Manufacturing Solutions 11.0 HyperFormTutorials
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The following countries have distributors for Altair Engineering: Asia Pacific: Indonesia, Malaysia, Singapore, Taiwan, Thailand Europe: Czech Republic, Hungary, Poland, Romania, Spain, Turkey. © 2011 Altair Engineering, Inc. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated to another language without the written permission of Altair Engineering, Inc. To obtain this permission, write to the attention Altair Engineering legal department at: 1820 E. Big Beaver, Troy, Michigan, USA, or call +1-248-614-2400. ® HyperWorks 11.0 Release Notes
Trademark and Registered Trademark Acknowledgments
Listed below are Altair® HyperWorks® applications. Copyright© Altair Engineering Inc., All Rights Reserved for: HyperMesh® 1990-2011; HyperCrash™ 2001-2011; OptiStruct® 1996-2011; RADIOSS® 1986-2011; HyperView® ® ® ® ® 1999-2011; HyperView Player 2001-2011; HyperStudy 1999-2011; HyperGraph 1995-2011; MotionView 1993® ® ® 2011; MotionSolve 2002-2011; HyperForm 1998-2011; HyperXtrude 1999-2011; Process Manager™ 2003-2011; Templex™ 1990-2011; Data Manager™ 2005-2011; MediaView™ 1999-2011; BatchMesher™ 2003-2011; TextView™ 1996-2011; HyperMath™ 2007-2011; ScriptView™ 2007-2011; Manufacturing Solutions™ 2005-2011; HyperWeld™ 2009-2011; HyperMold™ 2009-2011; solidThinking™ 1993-2011; solidThinking Inspired™ 2009-2011; Durability Director™ 2009-2011; Suspension Director™ 2009-2011; AcuSolve™ 1997-2011; and AcuConsole™ 2006-2011. In addition to HyperWorks® trademarks noted above, GridWorks™, PBS™ Gridworks®, PBS™ Professional®, PBS™ and Portable Batch System® are trademarks of ALTAIR ENGINEERING INC., as is patent # 6,859,792. All are protected under U.S. and international laws and treaties. All other marks are the property of their respective owners.
Manufacturing Solutions 11.0 Tutorials - HyperForm
HyperForm ........................................................................................................................................... 1 Introduction................................................................................................................................... to HyperForm 3 Introduction................................................................................................................................... to HF Macros - HF-0010 5 Introduction to HyperBlank Macros HF-0010 ................................................................................................................................... 11 HF-0100: ................................................................................................................................... General Introduction 13 Radioss One Step ................................................................................................................................... 33 HF-0150: ........................................................................................................................................ Quick Setup 35 HF-0200: ........................................................................................................................................ Geometry Cleanup 49 HF-0300: ........................................................................................................................................ Automeshing 65 HF-0400: ........................................................................................................................................ Mesh Quality 81 HF-0500: ........................................................................................................................................ Model Preparation - Undercut Check and Autotipping 89 HF-1000: ........................................................................................................................................ One-Step Stamping Simulation 95 ........................................................................................................................................ HF-1010: Increasing Blankholder Pressures 105 ........................................................................................................................................ HF-1020: Applying Drawbeads and Performing Circle Grid Analysis 109 ........................................................................................................................................ HF-1030: Transferring Forming Results to Crash Analysis 115 ........................................................................................................................................ HF-1040: Laser Weld 123 ........................................................................................................................................ HF-1050: Trim Line Layout 127 Incremental Analysis ................................................................................................................................... 133 ........................................................................................................................................ HF-3000: Introduction to Incremental_Radioss and Incremental_Dyna 135 ........................................................................................................................................ HF-3001: Auto Process 143 ........................................................................................................................................ HF-3002: User Process 159 ........................................................................................................................................ HF-3003: Setting Up a Multi Stage Simulation from the User Process 175 ........................................................................................................................................ HF-3010: Simple Draw Forming 181 ........................................................................................................................................ HF-3020: Combined Binderwrap and Draw Forming Analysis 191 ........................................................................................................................................ HF-3030: Drawbead 203 ........................................................................................................................................ HF-3040: Springback 213 ........................................................................................................................................ HF-3050: Trimming 219 ........................................................................................................................................ HF-3060: Gravity 225 ........................................................................................................................................ HF-3070: Redraw 227 ........................................................................................................................................ HF-3080: Multi-stage Manager 237 ........................................................................................................................................ HF-3090: Tube Bending 247 ........................................................................................................................................ HF-3100: HydroForming 255 ........................................................................................................................................ HF-3110: Blank Optimizer 265 Die Module ................................................................................................................................... 273 ........................................................................................................................................ HF-2005: Basic Addendum Creation Using Die Process 275 ........................................................................................................................................ HF-2010: Basic Addendum Creation 281
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........................................................................................................................................ HF-2020: Designing a Parametric Addendum 287 ........................................................................................................................................ HF-2030: Modifying a Parametric Addendum 307 HF-2040: Parameterization of External Binder and Addendum Section Using Section Editor ........................................................................................................................................ 317 Optimization ................................................................................................................................... 327 ........................................................................................................................................ HF-4010: Mesh Morphing 329 ........................................................................................................................................ HF-4020: Optimization 1-Step 337 Result Mapping ................................................................................................................................... 347 ........................................................................................................................................ HF-5000: Using Result Mapper in HyperCrash 349 ........................................................................................................................................ HF-5100: Result Mapping Using Process Manager 357 HF-6000:................................................................................................................................... Die Structure Optimization 367
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HyperForm Introduction HF-0010: Introduction to HF Macros HF-0100: General Introduction
Radioss One Step Analysis HF-0150: Quick Setup HF-0200: Geometry Cleanup HF-0300: Automeshing HF-0400: Mesh Quality HF-0500: Model Preparation - Undercut Check and Autotipping HF-1000: One Step Stamping Simulation HF-1010: Increasing Blankholder Pressures HF-1020: Applying Drawbeads to a Model HF-1030: Transferring Forming Results to Crash Analysis HF-1040: Laser Weld HF-1050: Trim Line Layout
Incremental Analysis HF-3000: Introduction to Incremental HF-3001: Auto Process HF-3002: User Process HF-3003: Setting Up a Multi Stage Simulation from the User Process HF-3010: Simple Draw Forming HF-3020: Combined Binderwrap and Draw Forming Analysis HF-3030: Drawbead HF-3040: Springback HF-3050: Trimming HF-3060: Gravity HF-3070: Redraw HF-3080: Multi-stage Manager HF-3090: Tube Bending HF-3100: HydroForming HF-3110: Blank Optimizer
Die Module
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HF-2005: Basic Addendum Creation Using Die Process HF-2010: Basic Addendum Creation HF-2020: Designing a Parametric Addendum HF-2030: Modifying a Parametric Addendum HF-2040: Parameterization of External Binder and Addendum Section Using Section Editor
Optimization Study HF-4010: Mesh Morphing HF-4020: Optimization 1-Step
Result Mapping HF-5000: Using Result Mapper in HyperCrash HF-5100: Result Mapping Using Process Manager
HF-6000: Die Structure Optimization
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Introduction to HyperForm The following introductory tutorials are available:
HF-0010: Introduction to HF Macros HF-0100: General Introduction
HF-0010: Introduction to HyperBlank Macros HF-0100: General Introduction to HyperBlank
Radioss One Step Analysis HF-0200: Geometry Cleanup HF-0300: Automeshing HF-0400: Mesh Quality HF-0500: Model Preparation - Undercut Check and Autotipping HF-1000: One-Step Stamping Simulation HF-1010: Increasing Blankholder Pressures HF-1020: Applying Drawbeads to a Model HF-1030: Transferring Forming Results to Crash Analysis HF-1040: Laser Weld HF-1050: Trim Line Layout
Incremental Analysis HF-3001: Auto Process HF-3002: User Process HF-3010: Simple Draw Forming HF-3020: Combined Binderwrap and Draw Forming Analysis HF-3030: Drawbead HF-3040: Springback HF-3050: Trimming HF-3060: Gravity HF-3070: Redraw HF-3080: Multiple Stage Manager HF-3090: Tube Bending HF-3100: HydroForming HF-3110: Blank Optimizer
Die Design
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HF-2010: Basic Addendum Creating HF-2020: Designing a Parametric Addendum HF-2030: Modifying a Parametric Addendum HF-2040: Parameterization of External Binder and Addendum Section using Section Editor
Optimization Study HF-4010: Mesh Morphing HF-4020: Optimization 1-Step
Result Mapping HF-5000: Result Mapper Using HyperCrash HF-5100: Result Mapping Using Process Manager
HF-6000: Die Structure Optimization
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Introduction to HF Macros - HF-0010 Radioss One Step process macros This is the interface for HyperForm with the Radioss One Step macro active. You will see the active browser for Radioss One Step on the left side of the interface. See the online help for information about the specific macros that are available.
HyperForm interface w ith One Step tab active
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HyperBlank interface w ith the OneStep tab active
All the Radioss One Step macros are located on the 1Step page of the Utility Menu. These macros allow you to quickly set up an analysis for one step simulation. The Radioss One Step macros are divided into the following three sections.
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Model
Allows you to import, cleanup, and mesh the model.
Setup
Allows you to setup the model for simulation using Radioss One Step.
Results
Allows you to do post-processing once the analysis is done.
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Radioss One Step Utility menu
Incremental process macros The following image shows the Utility Menu of the HyperForm interface with Incremental_Radioss user profile:
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Incremental_Radioss Utility Menu
All of the macros are located in the Radioss page of the macro area. The incremental process macros allow you to more easily setup different application types. The following application types are available under Application.
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Form - 1st forming operation setup. Bend - Tube bending setup. Hydro - Hydroforming setup. Blank Opti - Blank Optimizer TL Opti - Trim Line Optimizer Die Compensation - Die Compensation macroDepending on the application type chosen, the setup process contains different macros. The organization of the buttons within the Utility Menu is topdown, guiding you through each step of the specific application type. Further explanation of each application type is provided in the subsequent tutorials.
Return to HyperForm Tutorials
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Introduction to HyperBlank Macros - HF-0010 HyperBlank process macros This is the interface for HyperBlank with the OneStep tab active. This is the default setting when HyperBlank is started. The various macros that are available for HyperBlank are available on the Utility Menu, which is also on the left side of the interface. See the HyperBlank online help for information about the specific macros that are available.
HyperBlank interface w ith the OneStep tab active
All the macros are located on the Utility Menu. These macros allow you to quickly set up an analysis for one step simulation. The macros are divided into the following three sections. Model
Allows you to import, cleanup, and mesh the model.
Setup
Allows you to setup the model for simulation.
Results
Allows you to do post-processing once the analysis is done.
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HyperBlank Utility Menu
Further explanation of each application type is provided in the subsequent tutorials.
Return to HyperForm Tutorials
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HF-0100: General Introduction HyperForm, a subset of Manufacturing Solutions, is a finite element based pre- and post-processor for sheet metal forming. It combines an extremely fast one-step solver and incremental forming solution using Radioss as the solver. It also integrates well with the LS-DYNA solver for incremental forming simulation. With the customized geometry manipulation and mesh generation capabilities, HyperForm enables you to build metal forming related finite element models, view their results, and perform data analysis. HyperForm integrates the functionality of HyperMesh and provides engineers at any stage of product design with quick, valuable, reliable information, reducing the overall product cycle. HyperForm's die module enables engineers to create and analyze conceptual die designs in order to generate an optimized die. Die concepts can then be read into any CAD system as a starting block for the actual die build. Integrated with HyperView, HyperForm can export data in the .h3d format allowing results to be visualized using HyperView Player with any web browser. This tutorial introduces HyperForm, as well as many basic concepts and tasks that are needed to get started with HyperForm, and which serve as pre-requisites for most other HyperForm tutorials. In this tutorial, you will be introduced to HyperForm from the one-step analysis point of view. The HyperForm interface for incremental analysis will be described in later tutorials. This tutorial covers: Session 1: Fundamental HyperForm user interface o
User Profiles
o
Graphics Area
o
Using the mouse
o
Tool bar menu
o
Main menu
o
Toggles and switches
o
Utility Menu
o
The pull-down menus
Session 2: Using the online help Session 3: File input and output Session 4: The concept of collector Session 5: Secondary menus o
Menu items
o
Entity selector
o
Direction selector
o
Input fields
o
Pop-up menus
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o
Function buttons
Session 6: Default HyperForm files
Exercises: Three exercises are provided in this chapter: Exercise 1: Opening a database file and using the tool bar Exercise 2: Understanding Collectors and using online help Exercise 3: Translating elements
Session 1: Fundamental HyperForm user interface The HyperForm window consists of these main areas: the graphics area, the User Process tab, the header bar, the main menu, Utility Menu, and the drop-down menu as shown below. You can access secondary menus either through their main panel or by using keyboard function keys.
User profiles The HyperForm user interface includes the following analysis configurations: Radioss One Step: Setup, run, and review of a one-step analysis Incremental_Radioss: Setup and run an incremental analysis using RADIOSS Solver
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Die Module: Create and edit binders and addendums Incremental_LsDyna: Setup and run an incremental analysis using the LS-DYNA solver After starting HyperForm, the following dialog appears.
In the Applications: field, select Manufacturing Solutions and then select one of the modules - Radioss One Step, Incremental_Radioss, Incremental_LsDyna, or Die Module - before performing any further operations. The selected configuration can include loading a specific template, loading a specific Utility Menu, renaming panels, removing unused panels or subpanels, and removing, moving, or renaming panel options. The selected configuration can change the appearance of a panel, but they do not affect the internal behavior of each function.
Graphics Area The graphics area displays geometry, models, and XY plots.
Status Bar
The status bar is located at the bottom of the HyperForm window, just below the user profile switches on the Utility Menu. It displays the name of the current panel and user profile, and model status information. Messages also appear on the message bar, temporarily overriding the title and status information.
Using the Mouse The mouse attached to your system is integral to HyperForm and can be used in almost every aspect of user
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input. A two- or three-button mouse can be used with HyperForm. The mouse buttons have these functions: Left mouse button
Performs selection operations.
Right mouse button
De-selects entities in the graphics area. Aborts graphics operations.
Middle mouse button
In the rotate (r) and arc dynamic motion (a) modes, selects a new center of rotation when you pick a node in the model.
CTRL + left mouse button
Dynamically rotates the model
CTRL + the middle mouse button
Zooms into an area of the model
CTRL + the right mouse button
Pans the model
Toolbars Collectors toolbar
Visualization toolbar:
Display toolbar:
The toolbars enable you to manipulate the view of the model, control which collectors are displayed in the graphics area, set global modeling parameters, and edit solver-specific data. The functions of some of the toolbar menu icons are described below: Panel
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Icon
Description
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Files
Load, save, or import files.
Card edit
Edit solver-specific data in card format
Wireframe Elements
Draws model geometry as a wire-frame
Shaded Elements & Mesh Lines
Draws model geometry in shaded mode
Wireframe geometry
Draws model geometry as a wire-frame. Click the downward arrow to choose between excluding and including surface lines.
Shaded Geometry & Surface Edges
Draws model geometry in shaded mode. Click the downward arrow for options: with edges or without them.
Visualization
Show or hide different types of topology, connector, or morphing entities. A sub-menu is enabled when this panel is selected.
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The following viewing icons are available: Item
Icon
Description
Plot Refresh
Refreshes the graphics area by re-plotting the model
Previous View
Returns to the previous view
Fit View
Resizes the model view to fit the model to the graphics area
Modal Zoom
Circle zoom (left click) / Dynamic zoom (right click). Left-clicking activates the circle zoom feature. Circle zoom deactivates after zooming once, or when you click either button while the pointer is in the graphics area.
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Right-clicking activates the dynamic zoom feature. Once active, right-click and drag in the graphics area to zoom in/out. Left-click to deactivate. Incremental Zoom
Zoom incrementally; left-click to zoom in, right-click to zoom out
Rotate Mode
Rotate modes: this functions in one of two different ways: Left-click to activate dynamic rotate mode. Once active, clickand-drag in the graphics area to rotate the model. Right-click to deactivate. Right-click to activate dynamic spin mode. Once active, rightclick in the graphics area and hold the mouse button down to make the model spin. Left-click to deactivate.
Pan modes
Pan modes: this functions in one of two different ways:· Left-click to activate pan mode. Once active, click-anddrag in the graphics area to pan the model view. Right-click to deactivate· Right-click to activate center mode. Once active, right-click in the graphics area to change the graphics area center. Left-click to deactivate.
Rotate (left/ right)
Click the left mouse button to rotate the model leftward, and the right button to rotate it rightward
Rotate (up/ down)
Click the left mouse button to rotate the model upward, and the right button to rotate it downward
Spherical clipping
Use spherical clipping to isolate portions of the model regardless of component or collector
User View / True view
Open a pop-up menu used to save and retrieve user-defined or standard views.
True View
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Exercise 1: Opening a database file and using the toolbar Step 1: Load the HyperForm Radioss One Step environment file 1.
Start HyperMesh.
2.
On the Preferences menu, click User Profiles….
3.
For Application, select Manufacturing Solutions. Verify that HyperForm and Radioss One Step are selected.
4.
Click OK.
Step 2: Load the model file 1.
From the File menu, select Open.
2.
In the Open File dialog, change the Files of type: field to All files.
3.
Navigate to the 1Step folder, click on the file Die_Mesh.hm and click Open.
Step 3: Change the visualization of the model 1.
In the Model Browser, expand the Master Model folder, and then Component folder.
2.
Right-click on the Binder component and select Hide. Notice the Binder mesh is no longer displayed in the graphics area. Right-click on it again and select Show.
3.
From the toolbar, click the Shaded Elements & Mesh Lines icon shaded mode.
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to re-draw the model geometry in
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4.
From the toolbar, click the Wireframe Elements icon mode.
to re-draw the model geometry in wireframe
5.
From the toolbar, click the Element Color Mode icon
and select By Mat from the selection list.
Notice that the Binder and Addendum components become a gray color. This indicates the two components share the same material. 6.
Repeat step 5 and change the setting back to By Comp.
7.
From the Preferences menu, click Colors.
8.
The graphics area is displayed as a gradient color. You can change both the lighter and darker colors. Click the color box next to Background 1 and Background 2 and select other color options. This changes the background color to your selection.
9.
Click Reset to restore the default settings.
10. Click Close to close the dialog. 11. From the toolbar, right-click Pan modes
.
12. Move the mouse cursor to graphics area, keep on holding the right mouse button and pan the model graphically. Move the mouse cursor back to toolbar menu to release the panning action. Note: Pan action can also be achieved by holding Ctrl keyboard + right mouse button. 13. From the toolbar, left click Rotate Mode icon
to enter dynamic rotate mode.
14. Click and drag in the graphics area to rotate the model. 15. From the toolbar, left click Incremental Zoom icon 16. From the toolbar, click Fit View icon
to zoom in on the model.
to fit the model on the screen.
17. From the toolbar, left click User View / True view icon
to open the user view panel
18. Click the left button to review the model from the XZ plane.
Main Menu From the main menu you can access to a variety of panels grouped by the selected user profile.
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The main menu w ith the Radioss One Step user profile loaded
Toggles and Switches Toggles and switches allow you to select and specify options that need to be determined before you complete the function. Click a toggle to alternate between two options.
Click a switch to display a list of options in a pop-up menu.
Reset button. This removes selection and back to empty value
Utility Menu The Utility Menu is located on the left side of the graphics region and can be relocated by clicking on View and selecting Tab Area. When Manufacturing Solutions and HyperForm working environments are loaded, the Utility Menu is automatically switched to the HyperForm working environment. It provides tools for defining/reviewing/editing a model. The Model tab option enables the Model Browser functionality The user profile selection buttons are at the bottom of the menu.
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1Step Quick access/switch to the Radioss One Step user profile Radioss Quick access/switch to the Incremental_Radioss user profile Die Quick access/switch to the Die Module user profile Disp Tools for visualization purpose Util Utilities to perform operations at geometry level. User User-created macros only Dyna Quick access/switch to Incremental_LsDyna user profile To hide the Utility Menu: From the View pull-down menu, uncheck the Utility Menu. To display the Utility menu: From the View pull-down menu, check the Utility Menu.
The menu bar The menu bar, located just beneath the title bar, enable access to many types of functionality. Most menu options access panels, but some options perform other tasks such as configuring the layout of the
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HyperForm environment.
When the HyperForm environment is loaded, the menu bar also enables you to access to the fundamental menus regardless of the customization of the HyperForm interface.
Session 2: Using the online help HyperForm includes a help system to provide information about using the interface. There are several methods of accessing and using the online help system.
Method 1: Start online help from the pull-down menu This method provides access to all information. 1.
Stay in the main menu; do not click any panel.
2.
From the Help menu, select HyperForm. The HyperForm online help is launched. This book contains all information including Release Notes, User’s Guide, Reference Guide, Tutorials, etc.
Method 2: Start context-sensitive help This method allows you to search information specifically for individual panels. 1.
Click any panel from the main menu, for example, the Sections panel, and stay in the selected panel.
2.
From the keyboard, click the H key. This directly enters the help function for the selected panel. The information for the Sections panel is displayed on screen.
Method 3: Finding information using the tabs You can also search information by typing any keyword(s). 1.
Stay in the main menu; do not click any panel.
2.
From the Help menu, select HyperForm.
3.
Click on the Index or Find tab, and type in the desired keyword(s). A list of related topics is displayed.
Session 3: File input and output File input and output is performed through the File menu.
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File - Open/ Saves and retrieves HyperForm binary database files. Save/ Save As There are no restrictions placed on HyperForm database file extension names other than those imposed by the operating system. To load a HyperForm database file on top of another HyperForm database file (*.hf ), use the import option. File - Import
Loads CAD generated geometry or finite element model information. It is possible to import a CAD generated geometry or a finite element model information file into a HyperForm database file. HF PARM translator is used to import one step analysis ASCII input file
File - Export
Writes an ASCII file in a format specific to the selected analysis code.
Load
Load a the template file used to format the HyperForm database for a specific analysis code, or load a Results file, or a Macro file
Run
Run a command file or a TCL script
Session 4: The concept of a collector Collectors store entities, grouping together all the data pertaining to an entity and allowing you to handle the data as a group. Collectors in HyperForm consist of the Components, Materials and Sections (for Incremental_Radioss and Incremental_LsDyna analysis) panels. The component and material collectors in HyperForm have specific data associated with them. In one-step analysis, the component collector contains thickness data while the material collector holds the Young’s Modulus of Elasticity value and other constants. All entities in a HyperForm database are stored in collectors. Based on the analysis type, each collector may use a dictionary or card image to define the attributes assigned to the collector. The Collectors panel allows you to create and update collectors and assign and edit card images or dictionaries. Before you build a model, create a component collector for storing or organizing different data.
Exercise 2: Understanding collectors and using online help The Die_Mesh.hm file from Exercise 1 should still be loaded in HyperForm. In steps 1 through 6, you will practice changing the visualization of component collectors. 1.
In the Model Browser, click on the Mesh icon next to the Part component to turn off the display of the mesh for that component. Notice the mesh of the Part component is no longer displayed in the graphics area. The surface of the Part component is still visible.
2.
Click the Mesh icon to turn the mesh display back on.
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3.
Similarly, click the Geometry icon next to the various components to turn their display on and off. When finished, right click on the Components folder and click Show to display all of the components completely. In steps 4 though 11, you will review card images, assign a new material to the Part component, and use the online help.
4.
From the Application menu, select Incremental_Radioss.
5.
From the main menu, click the Components panel.
6.
Double-click component: and select Part. The associated material is displayed. Notice material = Rigid_material.
7.
Click edit card to review the card image in solver definition.
8.
Click return to go back to the Components panel.
9.
Click material: and select CRDQ Steel material.
10. Click update. Notice the associated material is now changed to CRDQ Steel. 11. Press the H key to start the online help. The online help is launched, displaying the help topic for the panel. Review information for the Components panel. Return to the main menu when finished.
Session 5: Secondary Menu The secondary menu contains several stand-alone functions, like calculating the distance between two points. Accessing the secondary menu interrupts the active main panel and allows you to perform a function from the secondary panel and then return to the main panel. For example, a user can access the secondary menu by pressing the function keys, F1 through F12, Shift F1 through shift F12, and more.
Menu Items The menu items on each panel allow you to specify settings and enter information that is needed to perform the panel’s function. Panels can contain subpanels, function buttons, toggles, switches, entity selectors, direction selectors, data entry fields, input fields, and pop-up menus.
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In the following discussion of menu items, you will be using the Translate panel. Access it from the Geometry menu.
Entity Selector The entity selector allows you to choose the type of entity to be modified when performing a function. The entity selector may or may not have a switch ; some panels perform a function on only one type of entity. The entity selector button is yellow; when it is surrounded by a blue box, the collector is active and ready for you to select or pick the entities to be processed. You can click on the switch to change the entity selector type.
Direction Selector The direction selector allows you to define a plane or vector by using the global x, y, or z axis, or by selecting a vector, or by selecting nodes in the database.
Direction selector pop-up menu x-, y-, and z-axis Specify a direction along any one of the global axes. vector
Use a pre-existing vector entity (something you can create using the vector panel) to define a direction.
N1, N2, N3
Create a user-defined direction. Selecting two nodes, N1 and N2, allows you to define a vector direction with base point at N1 toward N2. Selecting three nodes, N1, N2, and N3, allows you to define a plane with base point at N1 (unless otherwise specified). The vector is normal to the plane and its direction is determined by the right hand rule.
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Direction vectors for 2 point and 3 point definitions
Clears the node selections.
Reset
Input Fields Input fields are used to enter text or numerical values. A description of the type of input precedes the field.
For numeric input fields, you can use the keyboard to enter the value or double-click the input field and use the pop-up calculator to enter the value.
An example to input values and operations is as below: "0.0 (default) + 6" will need to be inputted as 0.0(default), 6, +, enter
Pop-up Menus Pop-up menus display when there are several options from which to choose. For example, the extended entity selection menu (shown below) allows you to specify alternate methods for selecting entities of the current data type. To use the extended entity selection menu, click the yellow data type button of the entity selector. The menu automatically closes when you have made your selection. Notice the grayed-out options within the pop-up menu indicates that the function is disabled in the selected entity selection menu.
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Function Buttons The color of the menu button corresponds to its purpose: Green
Carries out a function or a command.
Red
Exits a panel or aborts a command.
Exercise 3: Translating Elements The Die_Mesh.hm file from the previous exercise should still be loaded in HyperForm.
Access the Translate panel by hot keys 1.
From the Geometry menu, select Translate.
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All selections under the Translate option are displayed. SHIFT + F4 is the hot key for the Translate function. 2.
Press SHIFT + F4 to access the Translate panel directly.
Select the elements to translate 1.
Click the entity selector switch
.
A pop-up menu is displayed, listing all the entity types that can be modified with the Translate panel. The mouse cursor is located at the center of the pop-up menu. 2.
Select elems to specify "elements" as the entity type you want to translate. After you select elems, the pop-up menu automatically closes. The yellow entity selector button displays "elems" and the button has a blue border to indicate that it is active.
3.
Click elems. The extended entity selection menu displays, with the mouse cursor in the center.
4.
Select by collector to indicate you want to select the elements by component collector. After you select by collector, a list of component collectors is displayed.
5.
In the graphics area, pick a cyan element by clicking near its element handle (the dot in the center of the element). Selecting this element also selects the component collector containing the element, Part in this case. The element picked is momentarily highlighted white. The check box preceding Part has a white check mark in it.
6.
Click select to select all the elements in the component collector, Part, as the elements to be modified when you use the translate function. The Translate panel again displays and all of the elements in the Part component are highlighted.
Specify a direction to translate the selected elements 1.
Click the direction selector switch. A menu is displayed with a list of plane and vector options for translating the selected entities. The mouse cursor is located at the center of the pop-up menu.
2.
Click N1 N2 N3 to select the N1, N2, N3 method. After you select N1, N2, N3, the pop-up menu automatically closes.
3.
Click N1. The blue border around N1 indicates it is active. The selected elements in the graphics area are now gray because the entity selector is not active.
4.
In the graphics area, pick a node. A green circle displays in the graphics area at the node that was picked. The N1 button no longer has a blue border, but the N2 button does. N2 is currently active.
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5.
In the graphics area, pick any other node. A blue circle displays in the graphics area at the node you specified. The N2 button no longer has a blue border, but the N3 button does. N3 is currently active, but in this case, a node for N3 will not be specified.
6.
In the graphics area, right click the blue circle to deselect the node N2. The blue node N2 is not displayed in the graphics area. The N2 button now has a blue border.
7.
In the graphics area, pick a different node. This new node is the new N2 node. A blue circle displays in the graphics area at the node you specified.
Specify a distance to translate the selected elements 1.
Double-click magnitude =. The calculator pop-up menu appears.
2.
Input 50.0, click enter and click exit to leave the calculator.
3.
Click translate +. The highlighted elements move 50 units in the positive N1-N2 vector direction with N1 being the vector’s base node and the vector passing through N2.
4.
Click reject to reject the translation action.
5.
Click f on the permanent menu. The model is resized to fit the screen.
Session 6: Default HyperForm Files HyperForm includes or automatically creates several default files. These include: hm.cfg
configuration file
hmmenu.set user interface settings command. cmf
command file
hm.cfg The hm.cfg file is a default configuration file read on start-up. The hm.cfg file controls many aspects of how HyperForm runs at your particular site. You can edit the commands in the hm.cfg file to your own preferences. command.cmf The command.cmf file is a standard ASCII file that HyperForm reads and writes. Command files allow you to retrieve a work session in case of a system crash or program a series of procedures. You can use a command file in applications that contain repetitive steps or you can create demonstrations. All commands executed by the HyperForm command processor are written to this file. This file is
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automatically created in the directory in which you started HyperForm. If the file already exists, new commands are appended to the existing file. For more information about the command.cmf file, please see the HyperForm online help topic HyperForm Commands. hmmenu.set The hmmenu.set file is a binary file that HyperForm updates when you exit HyperForm. Your personal hmmenu.set file stores many global parameters and is located in the directory from which you started HyperForm. If the file already exists, it is overwritten after you run a new session. The most recent global parameter values in the current HyperForm session are written to this file when you exit. The next time you start HyperForm, it has the values recorded in the hmmenu.set file. If the file does not exist when HyperForm is invoked, the global parameter values are default values.
Return to HyperForm Tutorials
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Radioss One Step The following Radioss One Step tutorials are available:
HF-0150: Quick Setup HF-0200: Geometry Cleanup HF-0300: Automeshing HF-0400: Mesh Quality HF-0500: Model Preparation - Undercut Check and Autotipping HF-1000: One Step Stamping Simulation HF-1010: Increasing Blankholder Pressures HF-1020: Applying Drawbeads to a Model HF-1030: Transferring Forming Results to Crash Analysis HF-1040: Laser Weld HF-1050: Trim Line Layout
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HF-0150: Quick Setup This tutorial describes the steps required for modeling and running one step analysis that can be performed in HyperForm within the Radioss One Step user profile. The following steps are involved in one step analysis: 1.
Geometry cleanup and meshing
2.
Assigning materials and thickness
3.
Defining symmetry
4.
Defining blankholders
5.
Defining drawbeads
6.
Setting the stamping direction either by tipping the part or by using the existing part orientation as the forming axis
7.
Checking for undercuts
8.
Running the analysis
Exercise 1: Geometry Cleanup and Meshing This exercise uses the model file Part1a.igs. The following image shows the program with the Radioss One Step user profile and model file loaded:
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Step 1: Load the model file 1.
Click File > Import....
2.
Click the Import Geometry icon
3.
Click the Select Files icon and browse to the file \tutorials\mfs\hf\1Step\part1a.igs.
4.
Click Import and then click Close.
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Step 2: Geometry cleanup 1.
In the OneStep tab, right-click on Parts > New > Pick... as shown in the image below:
Note: The component name is recognized automatically as Part once the model is loaded into the session. 2.
Pick the part from the screen.
3.
Click on proceed. Note: The material CRDQ steel and a thickness of 1 mm is assigned to the part by default.
4.
Right-click on the part lvl1 and select Geometry > Remove Holes.
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5.
In the diameter< field, enter 40.
6.
Click on the yellow surfs button to highlight it. Click again and select displayed from the extended entity selection menu. This selects all the entities on the screen.
7.
Click find. All pinholes found are highlighted with xP.
8.
Click delete to close the hole.
9.
Click return to close the panel.
Step 3: Meshing the part 1.
Right-click on the part lvl1 and select Mesh > R-Mesh.
2.
Enter the values as shown below:
3.
Click on Mesh....
4.
Click surfs and select displayed from the extended entity selection menu. This selects all the surfaces displayed on the screen.
5.
Click proceed.
6.
Click Close.
Exercise 2: Setting up One Step Analysis
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Step 1: Assigning the material and thickness to the part 1.
Right-click on CRDQ Steel > Database... to change the material selection. Note: A user-defined material can also be added to the database by editing the material file hf.dat.
2.
When finished viewing/changing the material selection, click Close to close the dialog.
3.
Highlight Thickness:1 by clicking on it once. Double-click on the digit 1 to make it editable and change the value to 1.5.
Step 2: Setting symmetry conditions 1.
In the OneStep tab, right-click on Symmetry:No > Edit.
2.
Click on the yellow nodes button and select on plane from the extended entity selection menu.
3.
Click the toggle switch to x axis.
4.
Pick a point on the symmetric plane, as shown below.
5.
Click select entities.
6.
Under Constraint Type, click the X radio button.
7.
Click size = and enter 10.
8.
Click update.
9.
Click return.
constraints along the symmetric edge
Step 3: Setting the stamping direction
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1.
Right click on Stamping Direction:X and select Z. Note: Stamping can also be done in any of the three principal axes or an arbitrary axis in space by using Stamping Direction in the Autotip panel. Use the stamping direction subpanel to specify the stamping in an arbitrary direction. –
In the Autotip panel, use the vector selector switch to assign a direction. If the stamping direction of the part is not one of the principal axes, use N1, N2, N3 option and select 2 nodes on the model to define a direction.
–
Click set.
Step 4: Selecting the blankholder Blankholders can be defined as the upper and lower holding surfaces that control metal flow around a shape to be formed in a draw operation. They supply a restraining force on the material during the pressing process. HyperForm allows you to define the blankholder force in two ways: on element and on edge. The correlation between the magnitude and level of the applied forces is always available. Edge blankholder force application allows you to restrain an edge by enabling automatic selection of all nodes between two user-defined nodes along a free edge of a part. You can define the blankholder force in two ways: tonnage force or pressure level (high, medium and low). Note
The pressure level is proportional to the area of blank under the blankholder as well as thickness. A pressure level of 2MPa, 5MPa and 10MPa for a 1mm blank has been chosen as a reference for Low, Medium, and High (based on practical experience). The tonnage (metric ton unit) is equivalent to the pressure times the blankholder area normalized/scaled by the thickness (1 metric ton = 9810N).
1.
In the OneStep tab, right click on Blankholders > New. If desired, you can double click on Blankholder1 to change the name.
2.
Right click on Blankholder1 > Elements…
3.
Click elems and select on plane.
4.
Select z-axis and pick a node on the binder (flat region) for B (base node).
5.
Click proceed.
6.
Friction, Tonnage and Pressure level appears below Blankholder1. Double click on the values for Friction and Tonnage to change the values.
7.
Right click on Pressure Level: and select Medium. Notice that the Tonnage changes according to the selected pressure level.
Step 5: Creating drawbeads Modeling the exact drawbead geometry requires a large number of elements, which increases CPU time dramatically. A practical approach is to use an equivalent drawbead model by representing the drawbead analytically and providing a constant drawbead restraining force and closure force.
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Use the calculate subpanel to determine the closure and restraining force based on drawbead dimensions. The restraining force is the value of the force (per unit length) applied by the bead in the plane of the blank surface. The closure force is the force (per unit length) required in the perpendicular direction to keep the drawbead closed.
1.
From the OneStep tab, right-click on Drawbeads > New > Restrain….
2.
Pick two nodes on the part as indicated in the image below to define the drawbeads.
3.
Click create. Notice a message shows "The drawbead set has been created." A line representing drawbeads is created.
4.
Notice that Drawbead1 is created with a default Restraint Force and Pressure Level. Double click Drawbead1 to rename it.
5.
Right click on Pressure Level > Medium. Notice that Restraint Force changes based on the Pressure Level selection.
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Step 6: Tipping 1.
Right click on the OneStep tab anywhere in the red box as shown below and select Autotip.
2.
Select the autotip radio button.
3.
Verify the entity selector is set to comps and select the lvl1 component.
4.
Verify the toggle is set to full model and keep the rest of the options as default.
5.
Click calc autotip. Notice the angle to be tilted is displayed on the header bar on the left hand bottom corner and the magnitude is displayed in the angle field
6.
Click autotip.
7.
This action will tilt the part by an angle calculated by HyperForm to reduce draw depth during forming.
8.
Click return.
Step 7: Checking for undercuts 1.
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Right click on the OneStep tab anywhere in the red box as shown above and select Undercut Check.
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2.
Click on the yellow comps button to highlight it.
3.
Pick the part from the screen.
4.
Click on check undercut. Notice the message “0 elements with undercut detected”. If there are undercuts in the model then the failed elements are highlighted on the screen.
5.
Click return.
Step 8: Checking the model and running the analysis 1.
Right click on the OneStep tab anywhere in the red box as shown above and select Check Model. A message is displayed on the message bar, stating “Model checked.”
2.
Right click on the OneStep tab and select Run.
3.
Enter a name for the run. The feasibility solver launches, as shown below: Note: It is advised to run the analysis into a separate folder.
Exercise 3: Post processing After the successful completion of the run, right click on the white space of the OneStep tab to see the Blank Shape, %thinning and Formability options, which were not available before running the analysis.
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Right click and select the desired result type for post processing.
Step 1: Blank Shape 1.
Right click on the OneStep tab anywhere in the white space and select Blank Shape.
2.
Under Blank Shape Profile: click on the Initial radio button. Notice that the initial blank shape is displayed on the screen, as shown below.
3.
Click on export to write out an iges boundary of the predicted blank shape to the folder where feasibility analysis was run. The file will be named as _blank.iges.
Exercise 4: Blank Fit
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Step 1: Fitting the initial blank shape into different configurations 1.
From the Tools menu, click on Blank Fit. This will bring up the blank fit utility, as shown below:
2.
Use the Part drop down menu to select the component on which the one step analysis was run.
3.
Keep the default values for Density and Cost per Kg.
4.
Under PLOT OPTIONS, click on the checkbox next to %Thinning and Formability. Notice that % Thinning and Formability buttons becomes active.
5.
Rotate the model to a desired direction and click on %Thinning. This contours the model with % Thinning result type.
6.
Left click to capture the image to include it in the report. A right click will abort the function and return to the Blank Fit macro. This is indicated by the image on the right hand bottom corner of the graphics area .
7.
Under BLANK SHAPES, check all the boxes.
8.
Click on Blank Fit. This will fit the blank into the selected shapes.
9.
Click on Publish Report. This will open a HTML report with hyperlinks to blank shapes and results, as shown below.
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11. Click Close.
Exercise 5: Blank Nest Step 1: Nesting the initial blank shape on coil or sheet 1.
Click Tools > Blank Nesting.
2.
Click on elems and select displayed from the extended entity selector menu.
3.
Click on the nesting button. A new window called Blank Nesting opens which allows you to nest the blank in different configurations.
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4.
Right click any where on the blank shape and select Duplicate. This will create a duplicate of the existing blank shape.
5.
Right click anywhere on the blue screen and select Auto nesting from the menu. This will make the best fit of the 2 shapes of the blank on a sheet.
6.
Click on File > Export.
7.
Enter a name and click on Save. This saves an .iges boundary of the nested sheet.
8.
Select File > Exit to close Blank Nesting, Note: There is a detailed explanation of all the options in Blank Nesting in the HyperForm online help.
Exercise 6: Report Generation Step 1: Publishing a report of the feasibility analysis results 1.
Click Tools > Report Generator. The Report Generator opens up as shown below:
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2.
Click on the Result File: file browser icon and select .res in the folder where you have run the feasibility analysis. Note: You must run feasibility analysis in a separate folder with no spaces in the path and in the folder name.
3.
Click on the Report Name: file browser icon and type a name for the report. Note: The folder and report name must not have any spaces in the folder name or file name.
4.
Check all the boxes under Result Types.
5.
Under Export Mode, select HTML.
6.
Under Export Options, select JPEG.
7.
Click on Generate. This creates a report in the folder selected in the Report Name field. It includes a folder called _data_dir and .hml.
8.
Open the folder that was selected for Report Name. Open the file .html in Internet Explorer or Firefox. This opens a html page with hyperlinks to the selected result types and the corresponding image with contour, as shown below:
9.
Click Close to close the panel.
Return to Radioss One Step Tutorials
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HF-0200: Geometry Cleanup When designers create CAD geometry, their priorities are different from those of analysts trying to use the data. A single smooth surface is typically split into smaller patches, each a separate mathematical face. The juncture between two surfaces often contains gaps, overlaps, or other misalignments. To make the geometry more appropriate for meshing, analysts need to combine a number of faces into a single smooth surface. A single, smooth surface not only allows the elements to be created on the entire region at once, but also prevents unnecessary artificial or accidental edges from being present in the final mesh. Sometimes, the gaps, overlaps, and misalignments present when surface data is imported can affect the mesh quality. By eliminating misalignments and holes, and suppressing boundaries between adjacent surfaces and unnecessary details, you can automesh across larger, more logical regions of the model and improve the overall meshing speed and quality. In this tutorial, you will use a variety of tools to prepare surface geometry for meshing. Exercise 1: Reviewing Geometric Problems Exercise 2: Fixing Geometric Problems
Tools Auto Cleanup panel The Auto Cleanup panel performs automatic geometry cleanup
Quick Edit panel (F11 hotkey) This panel combines many tools for rapid editing of model geometry.
Exercise 1: Reviewing geometric problems In this exercise, you will first review a variety of common geometric problems after reading a CAD file. The
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solutions are discussed in Exercise 2. This exercise uses the model file Bpillar_cleanup.hf.
Step 1: Load the model file 1.
Click File > Open....
2.
Browse to the location \tutorials\mfs\hf\1Step and select the Bpillar_cleanup.hf file.
3.
Click Open.
Step 2: Review the model in Topology color mode 1.
Click View > Toolbars > Visualization to display the Visualization toolbar. The Visualization toolbar will need the panels displayed also in the View menu.
2.
From the toolbar, select Geometry Color Mode
and change to By Topo.
Notice the color of the model is changed and topology definitions are displayed on screen. 3.
From the toolbar, click Shaded Geometry & Surface Edges
icon to shade the surfaces on screen.
The model comes in with several geometric problems after importing. You will first review the problems to have a better understanding of the nature of the model. In Topology color mode, each color represents different topological modes: Free edge (Red color): The edge is owned by one surface. On a clean model, free edges appear only along the outer perimeter of the part and internal holes. Free edges that appear between two adjacent surfaces indicate the existence of a gap between the two surfaces. Shared edge (Green color): The edge is owned by two adjacent surfaces. When the edges between two adjacent surfaces are shared (green), there is no gap or overlap between the two surfaces, and they are geometrically continuous. The automesh utility always places seed nodes along their length and will
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produce a continuous mesh without any gaps along that edge. The automesh utility will not construct any individual elements that cross over a shared edge. Suppressed edge (Blue color): The edge is owned and shared by two adjacent surfaces but it is ignored by the automesh utility. They are blue dotted lines by default. Like a shared edge, a suppressed edge indicates geometric continuity between two surfaces but, unlike a shared edge, the automesh utility will mesh across a suppressed edge as if were not even there. The automesh utility does not place seed nodes along their length and, consequently, individual elements will span across it. By suppressing undesirable edges you are effectively combining surfaces into larger logical meshable regions. Non-manifold edge (Yellow color): The edge is owned by three or more surfaces. They typically occur at "T" intersections between surfaces or when 2 or more duplicate surfaces exist. The automesh utility always places seed nodes along their length and will produce a continuous mesh without any gaps along that edge. The automesh utility will not construct any individual elements that cross over a nonmanifold edge. These edges cannot be suppressed and can sometimes be indication for duplicated geometry.
Step 3: Review and measure the largest pinhole diameter 1.
From the toolbar, select the Visualization icon
2.
From the Visualization tab, select the Topology icon Non-manifold check boxes.
. and clear the Shared, Suppressed and
Only the red free edges display. 3.
Click Close to close the Visualization tab.
4.
Press T on your keyboard and input thetax = -101.154, thetay = -59.845 and thetaz = 109.363.
5.
Click set angles to set the true view.
6.
Notice several pinholes as shown in image below.
Notice the biggest pinhole as indicated in the left side of the image is considered as a part of the feature and will be kept. The smaller holes on the flange area are considered removable. 7.
Press F4 on the keyboard to go to the Distance panel.
8.
Hold the Ctrl key and middle mouse button to draw a circle to zoom in the center bigger pinhole on the flange as indicated in the image below.
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9.
In the Distance panel, select the two nodes option. Notice a halo is surrounding N1.
10. Hold the left mouse button and move the mouse cursor to the N1 location on top of the hole (location A in the image) until the hole is highlighted. Release the left mouse button and click again to create a temp green node created on top of the hole. 11. Repeat the same procedure for N2 to create a second blue temp node as shown as location B in the image. 12. Notice the diameter of the hole (value next to distance = ) is about 3.2. The approximate diameter of the largest hole is about 3.2. Remember this value so you can apply it when you remove pinholes later. 13. Press F on the keyboard to fit the model to the screen. 14. Click return to close the panel.
Step 4: Review free edges 1.
From the toolbar, select the Wireframe Geometry icon
2.
Notice several red lines as shown as in the image below. An example can be found as indicated where an arrow is pointing.
.
Free edges that appear between two adjacent surfaces indicate the existence of a gap between the two surfaces.
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Step 5: Review a missing surface 1.
From the toolbar, select Shaded geometry and surface edges
.
The surfaces are shaded on the screen. 2.
From the toolbar, select the Visualization icon
3.
From the Visualization tab, select the Topology icon manifold to turn on the display of all definitions.
4.
Click v on the keyboard to open the dialog with saved views.
5.
Click restore 1 to display the previously saved missing surf view.
6.
Notice the missing surface as shown in the image below.
. and check Shared, Suppressed and Non-
Step 6: Review the distorted surface 1.
Click v on the keyboard to open the dialog with saved views.
2.
Click restore 2 to display the previously saved distorted surf view. Notice the dark shadow on top of the surface as indicated in the image below.
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You will use the Automesh panel to verify the quality of the surface in the following procedures. 3.
Click Mesh > Auto Mesh.
4.
Click surfs and select only the surface with dark shadow. Notice two surfaces are selected as shown in the image below. This is a first indication of distorted surface.
5.
Click element size = and input 0.5.
6.
Click mesh. Notice the mesh pattern has poor quality and higher node density at the center area (along the center shared edge). This is a second indication of the distorted surface.
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7.
Click abort to abort the meshing operation.
8.
Click return to close the panel.
Step 7: Review the duplicated surface In this model, you have duplicated surfaces existing in this model. 1.
Click v on the keyboard to open the dialog with saved views.
2.
Click front to review the front view. Notice the yellow lines surrounding the surface as indicated by an arrow below:
3.
Click Geometry > Defeature and then select the duplicates subpanel.
4.
Click the switch and change to faces.
5.
Click find. Notice the two surfaces are highlighted and identified.
Step 8: Review deviated trim line 1.
Click v on the keyboard to open the dialog with saved views.
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2.
Click restore 3 to display the previously saved improve share view. Notice the deviation of one trim line as circled in the image below. The deviation of the trim lines could cause poor mesh quality. An ideal trim line will look like the dash line on the right hand side of the image below. You will correct this problem later.
Step 9: Review incorrect fixed point definition 1.
Click v on the keyboard to open the dialog with saved views.
2.
Click restore 4 to display the previously saved fixed point view. Notice the incorrect definition for the free boundary. This is due to the incorrect definition of the fixed point as indicated in the image below.
Exercise 2: Fixing geometric problems In this exercise, you will use a variety of tools to fix the geometric problems.
Step 10: Remove pinholes using the Auto Cleanup panel
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1.
From the Geometry menu, select Auto Cleanup.
2.
Click edit parameters… to launch the Parameters File editor to modify Auto Cleanup settings.
3.
In the Parameters File editor, clear all settings under Other options:
4.
Click the
5.
Repeat the steps above and disable all options EXCEPT Geometry cleanup and Surface hole recognition.
6.
Click
7.
In the first row under Surface hole recognition, input 4.0 under R< and check the Remove option. The final result should look like the image below. Since the largest diameter of the holes on the flange is about 3.2, using the value 4.0 can make sure all the holes on the flange will be removed.
8.
Change Target element size: to 3.0.
next to Other options and change to . This disables the other options.
(Delete line) to delete the second row under Surface hole recognition.
The target element size is the desired mesh size after geometry cleanup.
9.
Click Apply and Ok to return to the Auto Cleanup panel.
10. Click surfs and select all from the pop-up window. 11. Click autocleanup. Notice the cleanup process is launched. A message is displayed "There is a conflict between the user requested element size of 3 and the quality criteria ideal element size 0.5 used in the optimization, How do you wish to proceed?"
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12. Click Continue. When the cleanup process is finished, a message "Geometry cleanup process is finished" is displayed in message bar. After the auto cleanup process, notice that: The four holes on the flange are removed. The number of free edges (red edges) is reduced as shown in the image below. If you wish to see only the free edge definitions, select the Visualization definitions EXCEPT Free edges.
icon and deactivate all topologic
Duplicate surfaces are removed.
13. Click return to close the Auto Cleanup panel.
Step 11: Fix the missing surface using the Quick Edit panel In this step, you will manually clean up geometry using Quick edit panel. 1.
From the toolbar, select the Visualization
2.
From the toolbar, click the Shaded Geometry & Surface edges icon
3.
Click v on the keyboard to open the dialog with saved views.
4.
Click restore 1 to withdraw previously saved missing surf view.
5.
Click F11 to access the Quick Edit panel.
6.
Click the line(s) button right next to filler surf:.
icon and activate all topologic definitions. to shade surfaces.
A blue halo appears and surrounds the line button. 7.
Click any red edge of the missing rectangular surface. A surface is created to fill the missing surface. Notice the previous four free edges are now changed to a green shared edge.
8.
Click return to close the panel.
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Step 12: (optional) Delete the distorted surface and recreate it Using the Auto Cleanup function, most of the time, distorted surfaces are removed automatically. If you don't see distorted surfaces after the Auto Cleanup operation, skip this step. 1.
Click v on the keyboard to open the dialog with saved views.
2.
Click restore 2 to display the previously saved distorted surf view.
3.
Press F2 on the keyboard to go to the delete panel.
4.
Click the entity selector and change it to surfs.
5.
Click surfs and select the distorted surface (the surface with dark shadow) from the screen.
6.
Click delete entity. This action deletes the distorted surface.
7.
From the menu bar, click Geometry > Create > Surfaces > Ruled.
8.
If necessary, click the switch to set the selection to line list. Click the upper line list selector and select the three red edges as shown in the image below.
9.
Click the lower line list selector and select the one red edge as shown in the image below.
10. Verify that auto reverse is activated. 11. Click create. 12. Click return.
Notice a new surface is created at the same location. The new surface has three shared (green) edges and one free (red) edge as indicated in the image below.
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13. Press the F11 key to open the quick edit panel. 14. Click the line(s) button right next to toggle edge:. 15. Change the tolerance to be 0.1. This is the geometric cleanup tolerance. 16. Use the left mouse button to click the red free edge to turn it into a shared green edge. 17. Click return to close the panel.
Step 13: (optional) Delete the duplicated surfaces Using the Auto Cleanup function, most of the time, duplicated surfaces are removed automatically. This step is optional if you wish to remove duplicated surfaces manually without Auto Cleanup. If you don’t see duplicated surfaces after the Auto Cleanup operation, skip this step. 1.
Click Geometry > Defeature.
2.
Select the duplicates subpanel.
3.
Change the entity selector from surfs to faces.
4.
Click faces and select all from the pop-up window.
5.
Click find. Notice two duplicated surfaces are highlighted and identified.
6.
Click delete to remove the duplicated surfaces.
7.
From the toolbar, select the Visualization icon
8.
From the Visualization tab, select the Topology icon and uncheck Shared, Suppressed and Nonmanifold to turn off the display of all definitions EXCEPT free edge (red line).
9.
From the toolbar, select the Wireframe Geometry icon
.
.
Notice a red circular line indicating free edge. Since there is no hole existing, it indicates a problem with redundant surface.
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10. From the toolbar, click the Shaded Geometry & Surface edges icon
to shade surfaces.
11. Press F2 on the keyboard to go to the Delete panel. 12. Change the entity selector to surfs. 13. Hold the left mouse button and move the cursor to the red circular line until the circular surface edge is highlighted. Let go of the left mouse button and click delete entity to delete the surface. Refer to the image below.
14. Click return to close the panel. 15. From the toolbar, select the Visualization icon
.
16. Check Shared, Suppressed and Non-manifold to turn on the display of all definitions.
Step 14: (optional) Relocate a shared edge Using the Auto Cleanup function should have relocated this edge. If you don't see this edge after the Auto Cleanup operation, skip this step. 1.
Click v on the keyboard to open the dialog with saved views.
2.
Click restore 3 to display the previously saved improve share view.
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3.
Click F11 to access the Quick edit panel.
4.
Click the points panel right next to replace points:. The function is activated.
5.
Click points and click the fixed point B as shown in the image below
6.
Click retain and click the fixed point A as shown in the image below. Notice the two fixed points are now merged. Point B is moved to point A.
7.
Repeat steps 5 and 6 to merge point C and point D by moving point D to the location of point C.
Step 15: Fix the incorrect fixed point 1.
Click v on the keyboard to open the dialog with saved views.
2.
Click restore 4 to display the previously saved fixed point view.
3.
Click point(s) for release point to activate this feature.
4.
Click the fixed point as indicated in the image below.
Notice the fixed point is released and some free edges are generated.
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5.
Click return to close the panel.
Step 16: Merge the two free edges In the following steps, you will switch two free edges by replacing one free edge with the other free edge. 1.
Click Geometry > Edit > Surface Edges > Replace.
2.
Click line under moved edge : and select the line shown as B in the image.
3.
Click line under retained edge : and select the line shown as A in the image.
4.
Click cleanup tol = and input 1.0.
5.
Click replace. Notice the gap is closed and a new share edge is generated.
Step 17: Toggle the remaining red edges into shared edges and un-suppress two blue edges You are still in the edit surface edges panel. 1.
Click toggle subpanel.
2.
With a blue halo surrounding the edge button, click the two free edges as indicated in the image below.
3.
Notice the two red free edges are now converted into shared edges.
4.
Press the t key and input thetax = 145.968, thetay = -79.495 and thetaz = 30.150.
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5.
Click set angles to set the true view. Notice three blue suppressed edges are indicated in the image below. You will toggle the blue suppressed edges and turn these two suppressed edges to green shared edges.
6.
Click return to go back to the edit surface edges panel.
7.
With the edge button activated, right-click the two suppressed edges to change them to green shared edges.
Step 18: Save the cleanup result 1.
From the File menu, click Save As.
2.
Use the file browser to save the file as Bpillar_cleanup_complete.hf.
3.
Click save.
Return to Radioss One Step Tutorials
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HF-0300: Automeshing In this tutorial, you are introduced to the meshing capabilities provided in HyperForm. Several meshing tools are available: BatchMesher AutoMesh R-Mesh (available in Radioss One Step, Incremental_LsDyna and Incremental_Radioss user profiles) B-Mesh (only available in the Incremental_Radioss and Incremental_LsDyna user profiles) The BatchMesher is an external tool that can perform geometry feature recognition, cleanup and automatic meshing (in batch mode) for given CAD files without user interaction. Detail of the BatchMesher will not be discussed in this tutorial. Refer to the HyperWorks online help for more information about BatchMesher. In this tutorial, you will be introduced to the three meshing modules: AutoMesh, R-Mesh and B-Mesh. In HyperForm, most of the element creation panels use the AutoMesh module, which supplies as much automated assistance as possible. AutoMesh allow you to adjust mesh interactively with a wide variety of parameters and choose from a suite of algorithms. You can interactively control the number of elements on each edge or side and you can immediately determine the nodes that are used to create the mesh. You can adjust the node biasing on each edge to force more elements to be created near one end than near the other, which allows you to see immediately the locations of the new nodes. The new elements can be specified as quads, trias, or mixed and can be first or second order elements. The created mesh can be previewed, which allows you to evaluate it for element quality before choosing to store it in the HyperMesh database. While you are in the meshing module, you can use any of viewing tools on the visual options menu to simplify the visualization of complex structures in your model. You can also re-mesh existing meshing interactively or automatically on surfaces or groups of elements. You will learn to use a variety of AutoMesh features later in this tutorial. R-Mesh (Rigid tool surface mesh) allows you to quickly mesh a rigid tool surface by specifying the max length of element, minimum length of element, chordal deviation, and fillet angle. B-Mesh (Blank surface mesh) allows you to quickly mesh a blank component. You can specify an average edge length and mesh selected surfaces. B-mesh is discussed in incremental analysis tutorials.
Tools The tools in this tutorial can be found in the Radioss One Step user profile. Midsurface The Midsurface panel allows you to extract the midsurface representation of a solid part.
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AutoMesh The AutoMesh panel allows you to create meshes or re-mesh existing meshing.
R-mesh macro Rapidly generates a quad/tria shell mesh ideal for representing rigid tool surfaces.
Exercise: Automeshing with different meshing options This exercise uses the model files Bpillar_AutoMesh.hf, Bpillar_AutoMesh_remesh.hf and Bpillar_AutoMesh_remesh_final.hf.
Step 1: Load the model file 1.
From the File menu, select Open....
2.
Browse to the file \tutorials\mfs\hf\1Step\Bpillar_AutoMesh.hf.
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3.
Click Open.
Step 2: Retrieve the mid-surface 1.
From the visualization toolbar, select the Geometry Color Mode icon
and change to By Topo.
Notice the color of the model is changed and topology definitions are displayed on screen. 2.
From the toolbar, click Shaded Geometry & Surface Edges
to shade the surfaces on screen.
The model is a pre-cleanup geometric model with thickness. In reality, it is common to have CAD data with thickness. You will learn how to extract midsurface in the next steps. 3.
From the menu bar, click Geometry > Midsurface.
4.
Verify that the auto midsurface subpanel is selected. The default toggle is set to closed solid.
5.
Click extraction options.
6.
Input max thickness ratio = 2.0 and toggle extract by component to cross components.
7.
Click return to exit the extraction options panel and return to the Midsurface panel.
8.
With surfs activated, graphically pick a surface on screen. Notice all surfaces are selected and highlighted.
9.
Click extract. Midsurface extraction takes about one to four minutes depending on system performance. Notice that once the operation is finished, a new component named Middle Surface is created that contains the extracted midsurface. By default, HyperForm applies the transparent view to the generated midsurface.
10. Click return to exit the panel.
Step 3: Prepare AutoMesh 1.
Using the Model Browser, expand the Components folder and hide all geometry EXCEPT Middle Surface.
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2.
Right-click on automesh. In the menu that appears, select Make Current. This sets the automesh component as default working component.
3.
From the File menu, select Save As... and enter the file name as automesh_ready.hf.
4.
Click Save.
Step 4: AutoMesh – size, biasing and automeshing secondary panel In this step, you will learn how to interactively mesh a blank using size and biasing control. The size and bias subpanel allows you to mesh surfaces or re-mesh existing meshes with some control over how the mesh is created. You can also adjust a mesh on-the-fly during the creation process using this subpanel. 1.
Click Mesh > Auto Mesh.
2.
Verify that the size and bias subpanel is selected.
3.
Click surfs and select displayed from the pop-up menu.
4.
Verify the following settings: element size = 3.0 mesh type = mixed elems to current comp toggle is set (generated elements will be stored in the current working component automesh component) first order toggle is set next to map: the size and skew checkboxes should be selected Toggle is set to interactive
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5.
Click mesh. Notice a mesh is displayed in the graphics area. You have entered the automeshing secondary panel (inactive mesh module), which allows you to manually adjust mesh before it is finalized.
6.
With the density subpanel selected and the adjust: edge option activated, move the mouse cursor onto any edge density number in the graphics area, and left-click to increase edge density.
7.
After the edge density number is modified, click mesh again to preview the modified mesh. Refer to the following images:
Notes: adjust: edge allows you to interactively increase/decrease mesh edge density by right/left-click. calculate: edge allows you to interactively modify individual edge or all edges based on desired element size. set: allows you to interactively modify individual edges or all edges based on a specified value. 8.
Select the mesh style subpanel. Mesh style allows you to specify the meshing and smoothing algorithm to use for each face of each domain when you are following a surface-based approach to the automeshing secondary panel.
9.
Under elem type: click the selector
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10. Click the set all button above the screen.
button and press the P key to refresh the
Notice all the element type symbols are changed to tria. Refer to the image below.
11. Click mesh. Notice the mesh type and symbol is changed to trias.
12. Click reject to reject the mesh. 13. For meshing algorithm, autodecide is the default algorithm. Review the image below for all the mapping definitions.
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14. Under elem type: click the selector
and select mixed element type
.
15. Click set all above the mixed button. 16. Click mesh again. 17. Select the biasing subpanel. Biasing allows you to control the element density biasing along edges. Element biasing is the placing of elements along an edge so that element size is smaller at one end than at the other, and is one way to improve element quality when doing transitioning. By default, all mesh edge biasing is linear with value 0.0. You can change the biasing style and increase/decrease biasing factor by left/right clicking on the edge biasing numbers. The following image shows different biasing styles.
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18. Select the checks subpanel. The checks option enables you to check the quality of generated elements before they are generated. 19. Click jacobian. Notice the default Jacobian value is 0.7. Elements with a Jacobian value < 0.7 are displayed in red in the graphics area. This option enables you to quickly identify initial quality before accepting the mesh. 20. Click return twice to close the panels. 21. From the File menu, select Save As... and enter the file name as automesh_size.hf. 22. Click Save.
Step 5: AutoMesh – QI optimized In QI optimized meshing, the surfaces are meshed to optimize the quality index (QI) of the elements generated. You can either provide a criteria file or update the quality index panel with the desired quality criteria. The surfaces are then meshed with algorithms that produce the best quality index. The placement of the nodes on the surface is also optimized to improve the QI. 1.
Click File > Open.
2.
Browse to select the previously saved automesh_ready.hf file and click Open.
3.
Click Mesh > Auto Mesh.
4.
Select the QI optimize subpanel.
5.
Input element size = 3.0.
6.
Click edit criteria.
7.
Set up all the criteria as shown in the following image:
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Note: It is recommended that you follow these guidelines for better accuracy: Warpage should be less than 25 Chordal Deviation should be small. 0.9 is a good threshold value to start with. Larger Jacobian values are better. Eliminate negative Jacobian values to prevent solver crashes. 0.4 is a good threshold value. Chordal Deviation should be selected, with a small value (0.9) 8.
Click Apply and OK to close the Criteria File Editor.
9.
You are still in the QI optimize subpanel. Uncheck smooth across common edges with. This step disables the smoothing operation of mesh across minor changes in surface angles.
10. Click the surfs button and select displayed. 11. While all displayed surfaces are highlighted and selected, click mesh. 12. Click return to accept the mesh. 13. Click File > Save As... and enter the file name as automesh_QI.hf.
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14. Click Save.
Step 6: AutoMesh – edge deviation The edge deviation subpanel allows you to set specific meshing parameters to limit how far the mesh elements can deviate from the actual edges of the surfaces meshed. The edge deviation normally occurs on curved edges, because individual elements have straight edges and therefore can only approximate a curve. This automesh sub function automatically chooses the best element size to approximate a curve, within limits that you specify. Note that this differs from the size and bias sub panel, which only meshes with elements of a uniform size that you specify. 1.
Click File > Open.
2.
Select the previously saved automesh_ready.hf file and click Open.
3.
Click Mesh > Auto Mesh.
4.
Select the edge deviation subpanel and set the following options: min elem size = 0.5 max elem size = 15.0 max deviation = 0.1 (Defines the maximum allowable distance between an edge of the surface being meshed and an element edge) max angle = 15.0 (Defines the maximum allowable angle between two element edges). mesh type = mixed first order toggle is set
5.
Click surfs >> displayed from the pop-up window.
6.
Click mesh.
7.
Click return twice to accept the mesh.
8.
Graphically review the mesh. Notice large element size occurs at planar surfaces and smaller element size is applied to capture curved surfaces.
9.
Click File > Save As... and enter the file name as automesh_edge_deviation.hf.
10. Click Save.
Step 7: AutoMesh – surface deviation Similarly to the edge deviation subpanel, meshing behavior on this subpanel is driven by distances between flat elements and model geometry. When HyperMesh uses flat elements to approximate a curved surface, there is always a discrepancy between each element and the actual curve of the surface, because the element uses a straight line between two nodes. The surface deviation automesh method chooses the mesh density based on the severity of this deviation. Where the threshold deviation would be exceeded, HyperMesh uses a larger number of smaller elements to
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reduce the deviation. For more information, please refer to the online help.
Step 8: AutoMesh – rigid body mesh (R-mesh) Rigid bodies are surfaces that are expected to impact other model surfaces, but are rigid enough that they themselves are not expected to deform as a result of the impact. When modeling the results of a stamp pressing down on a metal sheet, it’s important to model the shape of the stamp because that determines the shape of the metal sheet after being pressed. However, it is not important to model the stresses placed upon the stamp tool. Therefore, the mesh quality of rigid tooling is less important in the comparison of the captured shape of the tools. The R-Mesh macro directly accesses the AutoMesh/rigid body mesh feature. You can find the R-Mesh… macro under both the Radioss One Step and Incremental_Radioss user profiles. 1.
From the File menu, click Open.
2.
Select the automesh_ready.hf file and click Open.
3.
From the Mesh menu, select R-Mesh.
4.
Modify Maximum edge length = 15.0 Note:
The fillet angle field is used to specify a maximum angle across which elements can be maintained. If at any time two adjacent elements’ normals would exceed this angle, HyperForm creates a new set of nodes between them to maintain clean feature lines. Using a higher value would result in nodes spanning along the feature line.
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5.
Click Mesh…
6.
Click surfs >> displayed from the pop-up window.
7.
Click proceed.
8.
Click Close to close the panel.
9.
From the File menu, select Save As... and enter the file name as automesh_R_mesh.hf.
10. Click Save.
Step 9: AutoMesh – Re-mesh an existing local mesh AutoMesh enables you to re-mesh elements. In HyperForm, you can remesh elements when no geometry exists. The remeshing function is activated when you switch the entity selector from surfs to elems. Elements are remeshed with the use of the HyperMesh inferred surface algorithm, if geometry for the selected elements needs to exist in the model. The inferred surface algorithm interpolates geometry data from the selected elements in order to create new mesh. When elements are selected to be remeshed, there is the break connectivity option and the vertex angle parameter. The break connectivity option detaches the node connectivity between adjacent selected and unselected elements. This allows you to adjust the node densities along the boundary of the selected elements. The vertex angle parameter defines the placement of vertices along the boundary of the selected elements. If the angle between two adjacent element edges along the boundary is less than the specified angle, a vertex is placed at the meeting point of the two edges. Anchor nodes create the effect of a fixed point on the inferred surface (which is derived from the existing mesh) and keep the location of the anchor nodes intact.
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1.
Click File > Open.
2.
Select the Bpillar_AutoMesh_remesh.hf file and click Open.
3.
Click Mesh > Auto Mesh.
4.
Change the entity selector from surfs to elems.
5.
Click elems and select by sets from the pop-up menu.
6.
Check refine and click select. Notice that a set of elements are highlighted.
7.
Input element size = 1.0 and make sure break connectivity is selected. Also verify that all the settings are as shown in the image below:
8.
Click mesh to refine a local region and click return. Review the result as shown in the image below. You are still in the mesh panel.
In the next few procedures, you will rebuild the mesh’s transitional region by re-meshing elements with applied anchor nodes. 9.
Click elems and graphically select elements as shown in remesh region in the image below.
10. Click nodes and graphically select nodes as shown in anchor nodes in the image below. 11. Toggle break connectivity back to keep connectivity.
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12. Click mesh and click return. Notice the mesh transition is re-built as shown in the image below.
13. Click return to close the panel.
Step 10: Equivalencing nodes To ensure connectivity between the elements, you need to equivalence any coincident nodes in the model. The equivalence operation identifies any location where two or more nodes exist within the specified search tolerance. During equivalence, one of the nodes is retained, and any element definitions referencing the other nodes are re-defined to use the retained node. 1.
Click Mesh > Check > Components > Edges.
2.
Click comps and select component by clicking any element on screen.
3.
Click select.
4.
Input tolerance = 0.2. (This specifies the minimum coordinate distance between two nodes.)
5.
Click the preview equiv button. This identifies duplicated nodes and highlights them with a circle. The nodes that preview equiv displays can be equivalenced.
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6.
Click equivalence to merge coincident nodes.
7.
Click return to close the panel. You have fixed the connectivity problem of one side of the refined region. The remaining connectivity problems can be fixed using the same technique. For the purposes of this tutorial, you will load the final result for reviewing directly.
8.
From the File menu, select Open....
9.
Select the Bpillar_AutoMesh_remesh_final.hf file and click Open.
10. Review the final result.
Return to Radioss One Step Tutorials
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HF-0400: Mesh Quality It is always a good practice to check the quality of the mesh before running the analysis. HyperForm allows you to check different quality criteria such as conformance to the surface topology, Jacobian, warpage, length, skew angle, etc. Conformance to surface topology is a visual check that ensures that the mesh lies on the surface and none of the elements are warped. Checks should be done to ensure that features are being reasonably captured (fill plot check). Mesh connectivity is equally as important. This can be checked using the edge check macro. In general, the below element quality will be satisfied to acquire better analysis result accuracy: Maintain connectivity Remove duplicate elements Avoid zero-length elements (recommended value larger than 0.1) Warpage is recommended to be less than 30 Larger Jacobian values are better. No negative Jacobian value is allowed. It is recommended to have a Jacobian value larger than 0.1.
Tools The tutorial uses the Element Quality Report module and the following menu options: Mesh > Check pull-down menu: o
Elements > Check Elements
o
Elements > Quality Index
o
Components > Edges
Mesh > Edit pull-down menu: o
Elements > Combine Elements
o
Elements > Split Elements
Exercise: Mesh quality checking and improving This exercise uses the model file mesh_quality.hf.
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Step 1: Load the model file 1.
From the File menu, select Open....
2.
Browse to the file \tutorials\mfs\hf\1Step\mesh_quality. hf.
3.
Click Open.
Step 2: Review the 2D mesh quality report 1.
From the Utility Menu, under Model, click on Check Elems.
2.
Click Quality Report. Notice a 2D Element Quality Report dialog appears. The Quality Report Tool will check all the 2D elements regardless of whether they are displayed on or off.
3.
Modify the following values: Warpage > 30.0 Length < 0.1 Jacobian < 0.1
4.
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Click Check.
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Warpage > 30.0 => # of failed Elems = ______________
5.
Length # of failed Elems = ______________
Jacobian < 0.1
=> # of failed Elems = ______________
Click Close to close the dialog.
Step 3: Check connectivity 1.
Click Mesh > Check > Components > Edges.
2.
Ensure the comps button is highlighted and graphically pick any element to select the component.
3.
Set the tolerance = 0.01 and toggle to find: free edges.
4.
Click find edges. HyperForm generates a new ^edges component. Notice red 1D edge elements are generated along the free boundary.
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5.
Using the Model Browser, expand the Component folder and uncheck all geometry except the ^edges component.
You should see only the red lines for the free mesh boundary. In the next step, you will find elements attached to the ^edges elements to visually verify this. 6.
Click return to close the panel.
7.
Click Shift + F5 to open the Find Attached Entities panel. Select the find attached subpanel.
8.
Click the yellow elems button and select displayed.
9.
Click find. Repeat steps 8 and 9 again to find 2 layers of elements attached to the edge elements. Note:
Two layers of elements attached to ^edges elements are displayed back on screen. You can click Find Attached more times to find more layers of elements. Any missing holes or elements can be indication of connectivity problems. This method can be used to localize the disconnecting areas.
10. In the Model Browser, right-click on the Component folder and select Hide to turn off the display of all components. 11. Right-click again and select Show to display all components back on screen. 12. Click return to go back to the main menu. 13. In the Model Browser, right-click on the ^edges component and select Delete. 14. Click Yes to confirm the action.
Step 5: Visually review the mesh quality 1.
From the toolbar, click the Shaded Elements and Mesh Lines
icon and select Feature Line mode
. 2.
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From the toolbar, left-click the Dynamic Rotate
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region and randomly rotate the model for reviewing. Notice two shaded areas as indicated in the image below. Those areas are indications of elements with poor quality. (You can also use the User Views icon and retrieve the saved views view1 and view2 view to review them.)
Shaded areas
3.
From the toolbar, click the Shaded Elements and Feature Lines Elements and Mesh Lines
4.
icon and switch to Shaded
.
Visually review the two areas again with the mesh line displayed. Notice the mesh quality problem.
Step 6: Manually split an element using the split panel In this step, you will use the split subpanel to manually fix an element quality problem. Four methods used to split elements free-form are illustrated below. HyperForm prompts you to build a line to split these elements using one of the four methods. Draw a window as shown in the figure below.
Types of element splits
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1.
From the toolbar, click the user view
2.
Click the F6 key to access the combine elements panel.
3.
Select the split subpanel and change the selector from displayed elems to elems.
4.
With elems activated, graphically select the element as indicated in the image below.
5.
Under Splitting line:, click points to draw a line passing through two nodes (two black circles in the image) of the selected element. Refer to the image below.
6.
Click split to split the element.
icon and click restore1 to retrieve a saved view.
Step 7: Use the Check Elements panel 1.
Click F10 to open the Check Elements panel.
2.
With 2-d selected, click duplicates to check if there are any duplicated elements. Notice that the message bar displays "0 duplicate elements were found". If any duplicate element is identified, it will be highlighted.
3.
Click length. Notice the minimum length is larger than 0.0 from the message bar. Any element with length equal to or less than 0.0 must be fixed.
4.
Click jacobian. Notice the minimum length is larger than 0.0 from the message bar. Any element with Jacobian value equal to or less than 0.0 must be fixed.
5.
In the warpage field, enter 30.0.
6.
Click the warpage button. Notice that the message bar displays "25 of 4668 (1%) failed. The maximum warpage is 176.01."
7.
Click the save failed button to store the failed elements (warpage > 30.0) into a user mark. Notice message bar displays "The highlighted elements have been placed in the user mark".
8.
Click return twice to close the panels.
9.
In the Model Browser, right-click on the Component folder and select Hide.
10. Press Shift+F5 on the keyboard to open the Find panel.
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11. Open the find entities subpanel. Click elems and select retrieve to retrieve elements from the user mark. Notice the message bar displays "25 elements added by ‘retrieve. Total selected 25". 12. Click find to display the 25 elements on the screen. Elements with warpage >30.0 are displayed on the screen. 13. Press the F key to fit the model to the screen. 14. Click return to close the panel.
Step 8: Display all elements 1.
Click Shift+ F6 key to open the Edit Elements panel.
2.
In the plate elements subpanel, click the selector to change from split all sides to divide quads.
3.
Click elems and select displayed.
4.
Click split. The displayed quad elements are divided into trias elements.
5.
In the Model Browser, right-click on the Component folder and select Show.
Step 9: Use the Quality Index 1.
Click Mesh > Check > Elements > Quality Index.
2.
Under pg1 (page 1), uncheck max size, aspect ratio and skew.
3.
Under threshold, input min size = 0.1 and warpage = 30.0.
4.
Click
5.
Uncheck all features EXCEPT # of trias.
right next to pg1 and change to pg2.
Notice elements with color on screen indicate they fail to satisfy the activated quality check. Quality Index function allows element's quality to be improved by node optimize method and element optimize method. -
For node optimize method, click node optimize and select a node on the screen. HyperForm repositions the node on the inferred surface to obtain the best possible quality for all elements attached to that node.
-
For element optimize method, click element optimize and select an element on the screen. The locations of all its nodes move on the inferred surface to obtain the best possible quality for that element and its neighbors.
In this, you will leave Jacobian = 0.3 . 6.
From the tool bar, click the user view
7.
Click node optimize and graphically pick the node as indicated in the image below.
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icon and click restore 3 to retrieve a saved view.
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Notice the selected node is relocated and element quality is improved. The associated element is also changed to transparent mode. 8.
Click return.
Step 10: Compare 2D mesh quality improvement 1.
Click Applications > Radioss One Step.
2.
From the Utility Menu, under Model, click on Check Elems.
3.
Click the Quality Report macro.
4.
Modify the following Warpage > 30.0 Length < 0.1 Jacobian < 0.1
5.
Click Check.
6.
Compare the values to the ones written in step 3.
7.
Click Close to close the dialog.
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HF-0500: Model Preparation - Undercut Check and Autotipping Undercut is a term used in part design that refers to situations that lead to die lock condition when the part is being formed. In real-time forming applications, parts are designed in such a way that they get locked if formed. Split dies and punches with negative rake angles are used to form such parts to avoid this situation. But for the simulation purpose in One-Step analysis, the part is tilted in such a way that the Z-axis of the part matches with the Z-axis of the punch and the die. This process of aligning the part axis with the tool axis is called Autotipping. The angle to be tilted is calculated automatically by HyperForm. Stamping can also be done in any of the three principal axes or an arbitrary axis in space by using the stamping direction subpanel in the Autotip panel. The autotipping option will reduce the draw depth by making the z-axis as the stamping direction. In this tutorial you will learn to check for undercut and remove it in a part by using the Autotip feature. This tutorial assumes that you are familiar with functionalities such as creating components, geometry cleanup, and meshing. Information on these topics can be found in the online help.
Tools The tools used in this tutorial can be found in the Radioss One Step user profile. Autotipping Allows you to set the user defined stamping direction for the part. It can also help you to tip (orient) the part in the formable position along the user defined stamping direction.
Undercut check panel Allows you to identify all the elements in the displayed part that may lead to a die-lock condition. The stamping direction is assumed to be along the global z-axis.
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Exercise: Undercut checking and Autotipping This exercise uses the model file mesh_quality.hf.
Step 1: Load the model file 1.
From the File menu, select Open....
2.
Browse to the file \tutorials\mfs\hf\1Step\mesh_quality. hf.
3.
Click Open.
Step 2: Check the undercut in the part 1.
Click Tools > Undercut Check.
2.
Click comps and select the mesh component.
3.
Click check undercut. Notice that the header bar displays the number of elements with an undercut problem. Any element detected with an undercut problem is highlighted on screen. You can click the saved failed button and save the undercut elements into a user mark to be retrieved and fixed later.
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In One-Step analysis, minor undercut problems occurring at non-critical areas are unavoidable and acceptable. When significant undercut is detected, Local bending/Unbending in the Advanced panel is automatically disabled for better result accuracy. In this exercise, the undercut problem is not severe and therefore you will leave the model as it is. 4.
Click return.
Step 3: Autotip the model 1.
Click Tools > Autotipping.
2.
Select the autotip subpanel.
3.
Verify the entity selector is set to comps and select the mesh component.
4.
Verify the toggle is set to full model and keep the rest of the options as default.
5.
Click calc autotip. Notice the angle to be tilted is displayed on the header bar.
6.
Click autotip. This action will tilt the part by an angle calculated by HyperForm to avoid the die lock situation during forming. The default tipping direction would be +Z. Click F to fit the model to the screen if the display is not desirable.
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Step 4: Autotip the model along a user defined plane 1.
Click the stamping direction radio button.
2.
Click on the vector selector and select the N1 N2 N3 option.
3.
Click on any 3 nodes as shown below along the tail of the part and click on set.
4.
Open the autotip subpanel.
5.
Verify the entity selector is set to comps and select the mesh component.
6.
Verify the toggle is set to full model and keep the rest of the options as default.
7.
Click calc autotip. Notice the angle of orientation is displayed on the header bar.
8.
Click autotip. Note: Similarly the tool tipping can performed as per the user specific requirements.
N1 N2 N3 node selections
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HF-1000: One-Step Stamping Simulation In this tutorial, you will learn how to: Import geometry data Clean up the geometry Create a finite element mesh In preparation for running the model, you will specify blankholders and set constraints. After running the analysis, you can view the results in contour plot, blank shape, and FLD contour modes.
Tools This tutorial uses the following panels available in the Radioss One Step user profile: Remove Holes panel Mesh panel Component panel Constraints panel Blankholder panel Blank Shape panel Formability panel
Exercise: Basic Draw Forming Analysis This exercise uses the model file part1a.igs.
The model comes in clean after importing. There are no free edges for this model. All of the edges are stitched. However, there are many small surfaces in the part. You will minimize the number of surfaces in the
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following steps.
Step 1: Import the model file 1.
From the File menu, select Import....
2.
Click the Import Geometry icon
3.
Click the Select Files icon and browse to the file \tutorials\mfs\hf\1Step\part1a.igs.
4.
Click Import and then click Close.
.
Step 2: Save a HyperForm data file 1.
From the File menu, click Save As....
2.
Enter the file name and extension as part1a.hf.
3.
Click Save. This saves the file as a database file, in the current working directory. The Save as…option can be used to save the file at the desired location.
Step 3: Change the component color 1.
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In the Model Browser, expand the Components folder.
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2.
For the components lvl1 and lvl7, click on the colored box to select a color of your choice. Notice the color of the components has changed.
Step 4: Suppress lines 1.
Click Geometry > Edit > Surface Edges > (Un)Suppress.
2.
Click lines and select all from the pop-up menu.
3.
Click suppress. This suppresses all of the internal edges that are shared by the surfaces and converts the model into one big surface. Stay in the same panel for the next step.
Model after lines have been suppressed
Step 5: Add fillet features 1.
Click lines again, and select the suppressed lines as shown in the image below.
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2.
Click unsuppress. The selected blue lines become green lines to define the corner of the fillets. (Green lines can be noticed when toggled to By Topo.) Later when you are meshing, node seeding can be generated along the green lines for better mesh quality control.
3.
Click return.
Edges to be unsuppressed prior to meshing
Step 6: Remove a hole from the surface 1.
Click Geometry > Defeature. Make sure the pinholes subpanel is selected.
2.
With the yellow surfs button active, choose the flat surface.
3.
Click the pinholes button and select all.
4.
Type 40 in the diameter field.
5.
Click find.
6.
Notice the xP display on screen indicating a pin hole has been identified with a diameter less than 40.
7.
Click delete.
8.
Click return.
Step 7: Create a finite element mesh 1.
Click Mesh > Auto Mesh.
2.
Click surfs.
3.
Select displayed.
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4.
Use the settings below : Toggle is set to interactive Element size = 7 Mesh type = mixed Toggle is set to elems to current comp Toggle is set to first order Switch is set to break connectivity Size and skew are selected
5.
Click mesh.
6.
Click return twice to close the panel.
Step 8: Load the material library 1.
Click Setup > Materials and select the library subpanel. Notice default material types are provided under Materials in file.
2.
Verify that CRDQ steel is loaded under Materials in memory. If not, click >> and load CRDQ steel under Materials in memory.
3.
Click return. Note:
The default material for one-step solver is located at [HyperWorks installation] /hm/ scripts/hyperform/hf.mat. You can edit this file and store user-defined material data into this library.
Step 9: Create and update the elements to the component 1.
Click Setup > Components.
2.
Click Component: and enter Part.
3.
Click Material: and select CRDQ Steel.
4.
If you created an FLD curve, click FLD curve and select the curve. Otherwise, leave it blank, and HyperForm will automatically create an FLD curve.
5.
Click thickness= and enter 1.
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6.
Select a color.
7.
Click create to create the component.
8.
Click elems and select all elements to be defined in the part component.
9.
Click move.
10. Click update. 11. Click return.
Step 10: Set constraints 1.
Switch to shaded mode by clicking on this button from the header bar:
2.
Click Setup > Constraints.
3.
Click nodes and select on plane.
4.
Set the direction selector to x axis.
5.
Click B.
6.
Pick a point on the symmetric plane as shown in the image below.
7.
Click select entities.
8.
Below Constraint Type, click X.
9.
Click size= and enter 10.
10. Click update. 11. Click return.
Constraints along the symmetric edge
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Step 11: Specify a blankholder Blankholders can be defined as the upper and lower holding surfaces that control metal flow around a shape to be formed in a draw operation. They supply a restraining force on the material during the pressing process. HyperForm allows you to define the blankholder force in two ways: on element and on edge. The correlation between the magnitude and level of the applied forces is always available. Edge blankholder force application allows you to restrain an edge by enabling automatic selection of all nodes between two user-defined nodes along a free edge of a part. You can define the blankholder force in two ways: tonnage force or pressure level (high, medium and low). Note
The pressure level is proportional to the area of blank under the blankholder as well as thickness. A pressure level of 2MPa, 5MPa and 10MPa for a 1mm blank has been chosen as a reference for Low, Medium, and High (based on practical experience). The tonnage (metric ton unit) is equivalent to the pressure times the blankholder area normalized/scaled by the thickness (1 metric ton = 9810N).
1.
Click Setup > Blankholder.
2.
Click blankholder and type Blankholder 1.
3.
Set the pressure level to low.
4.
Click friction = and enter .125.
5.
Click elems and select on plane.
6.
Toggle the switch to z-axis and pick a node on the binder (flat region) for B (base node).
7.
Click tolerance = and enter .3.
8.
Click select entities.
Select elements on the binder region
9.
Click color and select a color of your choice.
10. Click create.
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You can see the corresponding tonnage force in the tonnage= field. 11. Click return.
Step 12: Save the file 1.
Click File > Save As....
2.
Enter the file name as part1a_complete.hf.
3.
Click Save. This saves the file in the current working directory. The Save as…option can be used to save the file at the desired location.
Step 13: Run the analysis 1.
Click Setup > Run Analysis.
2.
Click project: and select the saved file part1a_complete.
3.
Click run analysis.
4.
Click view output.
5.
Click 1- to review information about the analysis.
6.
Click view output again. ASCII result output information is displayed. Notice estimated press tonnage = 0.391E+02 (tons)
7.
Click close to close the summary.
Step 14: View the results 1.
Click load results while in the same panel.
2.
Click return to exit the Run Analysis panel.
3.
Press D on the keyboard and click the toggle switch to loadcols. Click on None to turn off the display of constraints.
4.
In the Model Browser, expand Components and click on the Geometry icon to turn off the geometry display.
5.
Click Tools > %Thinning.
6.
When you are finished viewing results, click return.
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Contour plot show ing % thinning
Step 15: View the blank shape profile 1.
Click Tools > Blank Shape.
2.
Select Initial to display the minimal blank shape.
3.
Select Final to view the original part geometry.
4.
Click return.
Step 16: View the forming limit diagram 1.
From the Utility Menu, under Results, click Formability.
2.
Click component and select the blank component.
3.
Click Create FLD.
4.
Pick a point on the curve (which represents a corresponding element on the model) or pick an element on the model. The corresponding major (y) and minor (x) strain are displayed in the header bar.
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Forming Limit Diagram of part1a
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HF-1010: Increasing Blankholder Pressures In this chapter, you will learn how to increase blankholder pressure and compare the results from different pressure levels. The result from the previous tutorial, One-Step Stamping Simulation (HF-1000), will be used to compare the result from this tutorial.
Tools This tutorial uses the following panels, which are available in the Radioss One Step user profile: Blankholder panel Blank Shape panel Formability panel
Exercise: Increasing Blankholder Pressures This exercise uses the model file Blank_holder.hf.
Step 1: Load the model file 1.
From the File menu, click Open.
2.
Browse to the file \tutorials\mfs\hf\1Step\blank_holder. hf.
3.
Click Open.
Step 2: Edit the blankholder and save as a different file name 1.
Click Setup > Blankholder. The blankholder parameters are already set up from the previous run.
2.
Click blankholder and select Blankholder 1.
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3.
Set the pressure level to High. Notice value in tonnage = is changed from 21.127 to 105.634.
4.
Click update.
5.
Click return.
6.
From the File menu, click Save As..
7.
Enter the file name as blank_holder_complete.hf.
8.
Click Save.
Step 3: Run the analysis 1.
Click Setup > Run Analysis.
2.
Verify project = is set to blank_holder_complete.
3.
Click run analysis.
4.
Click load results when your job has finished.
5.
Click return.
Step 4: View the forming limit diagram 1.
Click Tools > Formability.
2.
Click comps and select part.
3.
Click create FLD.
Note:
4.
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Pick a point on the curve (which represents a corresponding element on the model) or pick an element on the model. The corresponding major (y) and minor (x) strain are displayed in the header bar. The corresponding element ID is also displayed in the Formability panel.
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Step 5: View the thinning 1.
Click Tools > Thinning.
2.
Click Contour.
3.
Click return to close the panel.
Return to Radioss One Step Tutorials
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HF-1020: Applying Drawbeads and Performing Circle Grid Analysis In general, the material flow is controlled by the blankholder and a resultant restraining force is created by friction between the tools and the blank. However, during a forming process, it is common that a blankholder does not make contact with an entire blank. Therefore, material flow is usually not fully controlled by the blankholder. When a high restraining force is required, a higher blankholder force must be applied, which could cause wear in the tools. A local control mechanism is therefore necessary to restrain the material flow sufficiently at relatively low blankholder pressure. This is achieved by applying drawbeads. The drawbead creates a restraining force by cyclically bending and unbending the sheet as it traverses the drawbead, causing strain hardening and a change in the strain distribution with consequential thinning of the blank. HyperForm allows you to define a restraining force for the drawbead in two ways: qualitative (pressure level) or quantitative (restrain force). You can also define a lockbead, which will apply a 100% restraining condition. HyperForm provides drawbead function both for One-Step and Incremental analysis. The interface of the Drawbead panel is switched automatically based on the currently-selected analysis type. In this tutorial, you will learn to define drawbeads for One-Step analysis. You will also use the Circle Grid panel to show relative magnitudes and associated direction of major and minor strains Exercise 1: Applying Drawbeads to a Model Exercise 2: Performing Circle Grids Analysis
This tutorial uses the Drawbeads panel, Run Analysis macro, and the Circle Grid panel.
Exercise 1: Applying Drawbeads to a Model This exercise uses the model file drawbead_1step.hf.
Step 1: Load the model file 1.
From the File menu, click Open.
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2.
Browse to the file \tutorials\mfs\hf\1Step\drawbead_1step.hf
3.
Click Open.
Step 2: Add a drawbead to the existing model 1.
Click Setup > Drawbeads.
2.
Select the restrain subpanel.
3.
Click drawbead and type Drawbead1.
4.
Pick a drawbead condition. Force level = medium. (High is 80%, Medium is 50% and Low is 20% of necking condition).
5.
Select the green color.
6.
With the halo surrounding node list, pick two nodes on the blank as indicated in the image below to define the drawbeads.
7.
Click create. Notice a message shows "The drawbead set has been created". A line is created representing drawbeads.
Step 3: Update drawbeads using the calculate subpanel Modeling the exact drawbead geometry requires a large number of elements, which increases CPU time dramatically. A practical approach is to use an equivalent drawbead model by representing the drawbead analytically and providing a constant drawbead restraining force and closure force. Use the calculate subpanel to determine the closure and restraining force based on drawbead dimensions. The restraining force is the value of the force (per unit length) applied by the bead in the plane of the blank surface. The closure force is the force (per unit length) required in the perpendicular direction to keep the drawbead closed.
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1.
Select the green calculate button.
2.
Click material: and select the current blank material (CRDQ steel).
3.
Verify that the drawbead height, shoulder radius, and drawbead radius are set to 6.25.
4.
Click calculate. Notice output restraint force, closure force and necking result are calculated accordingly.
5.
Click update to go back to the Drawbeads panel. If the geometry is such that a necking condition exists, the message, Material Locking Condition is displayed on the status bar.
6.
Click update.
7.
Click return.
Step 4: Save and run the analysis 1.
From the File menu, click Save As.
2.
Enter the file name as drawbead_1step_complete.hf.and click Save.
3.
Click Setup > Run Analysis.
4.
Make sure project: is set to drawbead_1step_complete.hf.
5.
Click run analysis.
6.
Click load results when your job has finished.
7.
Click return.
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Step 5: View the thinning contour plot 1.
Click Tools > % Thinning to view the thinning contour plot.
2.
Click contour to review the result.
3.
Click return to close the panel.
Step 6: Review the Forming Limit Diagram 1.
Click Tools > Formability.
2.
Click comps and select the part component.
3.
Click Create FLD.
4.
Click return.
Exercise 2: Performing Circle Grids Analysis This exercise uses the result from Exercise 1, drawbead_1step_complete.hf. In circle grid analysis, a sheet of metal is prepared by etching a circle grid onto the surface. Plastic deformation in the steel during the forming operation causes the circles to deform into ellipses. The plastic strain at each circle is then calculated from the major and minor diameters of the ellipses. In HyperForm, the Circle Grid panel allows you to show relative magnitudes and associated direction of major and minor strains with respect to deformed mode by displaying circles drawn on the blank surface. A result file needs to be loaded before performing circle grid analysis.
Step 1: Review circle grids 1.
Click Tools > Circle Grid.
2.
Pick the elements you want to display.
3.
Select Initial Circle to show the initial status of the blank.
4.
Select Deformed Circle to show the final deformed status of the blank.
5.
Set the switch to cir & dir, cir only, or dir only to show the circles and/or major and minor deformed direction.
6.
Click draw. The circle grid is displayed. If you change the display method, click draw again to refresh the screen.
7.
To clear the circles and/or directions, click clear.
8.
Click return to close the panel.
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Circle grids on initial and deformed blanks
Step 2: Press tonnage output The HyperForm solver also outputs the estimated press tonnage required to form the part. The press tonnage is written out in the output file. 1.
Click Setup > Run Analysis.
2.
Click view output.
3.
Select 1- to view the text in graphics area. Scroll down toward the bottom. The estimated press tonnage output can be seen as shown in the figure below.
4.
When finished, click Close to close the report, and click return to close the panel.
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HF-1030: Transferring Forming Results to Crash Analysis HyperForm One-Step analysis can generate a LS-DYNA input file (a dynain file) containing forming results. This effectively allows users to initialize a crash model with forming effects. The preferred quantities to be used for forming initialization are thickness and plastic strains (the stresses are set to zero). This tutorial features the procedures for preparing an input file for a crash simulation, and illustrates how to: Perform autotipping on the model Perform undercut checking Create a dynain file using the HyperForm One-Step solver Position the stamped part into a car coordinate position Export the stamped part for use in a crash simulation This tutorial uses the following panels: Autotipping panel Undercut Check panel Advanced panel (Dyna/Nastran output option) Position tool (Mesh menu)
Exercise: Transferring Forming Results to Crash Analysis This exercise uses the model file bumper_car_coordinates.hf.
Step 1: Load the model file and change the model orientation 1.
From the File menu, click Open.
2.
Browse to the file \tutorials\mfs\hf\1Step\bumper_car_coordinates.hf file.
3.
Click Open.
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The structure part (bumper_car_coordinates.hf) is not oriented with respect to the stamping direction (z-axis). Prior to running the forming simulation and transferring the forming to the part in a crash simulation, it must be re-oriented with respect to the z-axis. Refer to the image below.
Step 2: Autotip the model 1.
Click Tools > Autotipping.
2.
Select the autotip subpanel.
3.
Click comps and select the bump_car_co-ord component.
4.
Click select.
5.
Verify that the toggle is set to full model.
6.
Click calc autotip. Notice that the message bar displays the potential rotation angles for autotipping with respect to the stamping direction (z-axis)
7.
Click autotip.
8.
Click the F key on the keyboard to fit the model to the screen.
9.
Click return to close the panel.
Step 3: Perform undercut checking 1.
Click Tools > Undercut Check.
2.
Click comps and select the bump_car_co_ord component.
3.
Click the green check undercut button. Notice no elements get highlighted on the screen. The model passes the undercut check and no problems are detected. Note: A set is created when perform undercut checking. You will delete the set before solving the problem in One-Step analysis.
4.
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Click return to close the panel.
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5.
In the Model Browser, expand the Set folder and right-click on the hf_undercut_set set.
6.
Click Delete and select Yes to confirm the action.
Step 4: Request LS-DYNA/Nastran output format 1.
In this step, you will request output format in LS-DYNA and Nastran solver formats for forming analysis. This allows HyperForm to write out a results file that can be directly used to initialize a structural analysis model. The names for the output files are: [filename]_thk.nas and [filename]_dyna.k corresponding to Nastran and LS-DYNA solvers, respectively. [filename]_thk.nas contains the mesh data along with the nodal thickness. [filename]_dyna.k contains the mesh and the nodal thickness, followed by the stress tensor and plastic strain at each integration point within an element.
2.
Click Setup > Advanced.
3.
Click Radioss/Dyna/Nastran output. This option will take you to another panel.
4.
Toggle the option to w/o stress (zero stress will be written to the dynain file).
5.
Click comps.
6.
Click comps again and check the bump_car_co-ord component.
7.
Click select.
8.
Click return twice to close the panels.
Step 5: Save the file 1.
From the File menu, click Save As.
2.
Enter the file name as bumper_car_coordinates_complete.hf and click Save.
Step 6: Run the analysis 1.
Click Setup > Run Analysis.
2.
Click project: and select bumper_car_co_ordinates_complete.
3.
Click run analysis.
4.
Click return when the analysis is finished. Note:
Notice several files are generated when 1 step analysis is finished:
bumper_car_co_ordinates_complete.parm : HFSolver Input deck generated by HyperForm. bumper_car_co_ordinates_complete_dyna.k : Contains the mesh and the nodal thickness, followed by the stress tensor and plastic strain at each integration point within an element.
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bumper_car_co_ordinates_complete_thk.nas : Contains the mesh data along with the nodal thickness. bumper_car_co_ordinates_complete.out : ASCII output file contains model and run information. This file can be used to debug model and system level problems. bumper_car_co_ordinates_complete_opt.dat : Input deck for optimization runs with HyperStudy bumper_car_co_ordinates_complete.dat : Input data summary.
Step 7: Delete the current session and load the resultant DYNAIN file with the forming result 1.
Press F2 to open the Delete panel.
2.
Click delete model.
3.
Click yes to confirm deletion of model.
4.
Click Applications > Incremental LsDyna to change the user profile.
5.
From the File menu, click Import.
6.
Click the Import Solver Deck icon
7.
Click the folder icon and browse to the location where the previous analysis was run to select the file bumper_car_co_ordinates_complete_dyna.k.
8.
Click Open to select the file.
9.
Click Import to import the file and Close to close the dialog.
.
The output file bumper_car_co_ordinates_complete_dyna.k has the identical format as the LSDYNA DYNAIN file. During the import of the *_dyna.k (dynain) file, only the node and element definitions are read into HyperForm. The initial stress and plastic strain quantities are automatically placed into a new file with an .hmx extension (i.e. filename_dyna.k.hmx) and HyperForm automatically activates an INCLUDE control card to retain the information. More detail regarding DYNAIN file will be discussed in HyperForm incremental analysis. Notice the warning message "No renumbering or rotation is allowed. Stress and strain history will get written to a .hmx file. Continue?" 10. Click Yes. If the *_dyna.k (dynain) file contains stress quantities, no rotations of the component are allowed. The stress tensors are written with respect to a global coordinate system, and would require a suitable transformation. In this exercise, because the file contains zero stress, rotations of the component are allowed.
Step 8: Position a stamped part back to car coordinate position
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In this step, you need to orient the model *_dyna.k file (dynain file) which has the information from the One-Step forming run, back to the car co-ordinate system model for crash analysis. You will first import the original bumper_car_coordinates.hf and re-position forming result in z-axis (*_dyna.k (dynain) file ) back to the original vehicle coordinate. 1.
From the File menu, click Import.
2.
Select the Import HM Model icon
3.
Click the folder icon
4.
Select the bumper_car_coordinates.hf file.
5.
Click Import.
6.
Click the F key on the keyboard to fit the model to the screen.
7.
Click Mesh > Position > Components.
8.
Click the selector and choose comps.
9.
Click comps.
.
. In the file browser dialog, switch the Files of Type field to All Files.
10. Check the 1 component (import from *_dyna.k file) and click select. 11. Click from: N1, N2, and N3 and select three nodes on the part in forming coordinates (part in gray color) as shown below. 12. Click To: N1, N2, and N3 and select three nodes on the part in car coordinates (part in blue color) as shown below. Note:
The locations and selection sequence of N1, N2 and N3 nodes in "from" will need to exactly match the corresponding N1, N2 and N3 nodes in "To". This ensures the transformation (consisting of translations and rotations) that maps the differences between the two sets of nodes is applied to the selected entities until they are relocated.
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13. Click position to reorient the stamped part back to car coordinate position. Notice two models are overlapped with each other. 14. Click F2 and jump to the Delete panel. 15. Change the selector to comps. 16. Click comps again and select the bump_car_co-ord component. 17. Click select. 18. Click delete entity. The original part in vehicle is deleted. 19. Click return twice to go back to the main menu.
Step 9: Export the model as a new LS-DYNA input file 1.
From the File menu, select Export....
2.
Verify the template field is set to LsDyna.key (LsDyna template).
3.
Click File: and type the name bumper_crash_input.key.
4.
Click Export and click Close.
Step 10: Review the LS-DYNA input file and the *.hmx file 1.
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Open any text editor and load the bumper_crash_input.key file for reviewing.
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Notice: A. The dyna input file contains the thickness distribution from the One-Step analysis. *ELEMENT_SHELL_THICKNESS $
EID
PID
N1
N2
N3
N4
13
2
12
21
23
14
1.00013 14
2
1.00026 21
1.00026 15
2
22
1.0004 24
1.00045 14
1.00036
23 1.0004
1.00036
23 1.00038
25
1.0004
16 1.00073
1.00097
……………………………… ………………………………
B. Plastic strains are carried and included in the *_dyna.k.hmx file *INCLUDE [ full path ] / bumper_car_coordinates_complete_dyna.k.hmx
C. bumper_car_coordinates_complete_dyna.k.hmx contains residual strain data from the 1Step forming analysis. *INITIAL_STRESS_SHELL *INITIAL_STRESS_SHELL $ EID NPLANE NTHICK $ T SIGXX SIGYY SIGZZ SIGXY SIGYZ SIGZX EPS Where "EPS" is Effective Plastic Strain
D. Forming related control cards need to be deleted/modified accordingly before running the crash analysis *CONTROL_SHELL *CONTROL_HOURGLASS *CONTROL_BULK_VISCOSITY *CONTROL_CONTACT *CONTROL_PARALLEL *CONTROL_ENERGY
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*CONTROL_ACCURACY……
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HF-1040: Laser Weld A laser-welded blank consists of different thicknesses of metal that has been laser-welded together into a sheet. In addition to achieving direct cost reductions through the more efficient use of materials, tailored blanks also offer manufacturers the potential for greater flexibility in design. Manufacturers currently apply several types of joining processes to weld coated-steel tailored blanks such as seam welding, high-frequency welding, electron beam welding, and laser welding. In this tutorial you will learn to simulate the welding of two blanks with different thickness and material properties. To set up the analysis for a laser weld, you need to define two (or more) components in the supplied model. The components may be assigned to different materials and may have different thickness and FLC curves. You use a default FLC curve for one component and create a user-defined FLC curve for another component. In the next step, you will create a sample FLC curve using minor and major strain data.
Tools This tutorial uses the following panels: FLD Curves panel Component panel Save panel Run panel
Exercise: Laser Welded Blank This exercise uses the model file laser_weld.hf and Laser_weld_FLC_curve.csv
Step 1: Load the model file 1.
From the File menu, click Open.
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2.
Browse to the file \tutorials\mfs\hf\1Step\laser_weld.hf
3.
Click Open.
Step 2: Load the FLD curve 1.
From the Setup menu, click FLD Curves.
2.
Click the library subpanel.
3.
Click file = and select Laser_weld_FLC_curve.csv. The figure below shows the FLD curve panel.
On the left-hand side of the panel, under Curves in file, the name of the curve (FLD Curve) should appear. 4.
Click
to transfer the FLD curve to memory.
The name FLD Curve should appear beneath Curves in memory. 5.
Click return to exit out of the FLD Curve panel.
Step 3: Reorganize the elements into two components 1.
Click Mesh > Organize > Elements > To Component and select the collectors subpanel.
2.
Click elems and select by windows from the pop-up menu.
3.
Draw a window on the graphics area to include the top half of the elements of the entire model. Refer to the image below.
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4.
Click select entities. Notice the elements within the window are highlighted.
5.
Click Dest Component = and select comp1.
6.
Click move. All selected elements are moved and stored in the comp1 component.
7.
Repeat steps 1-6 and relocate lower elements into the comp2 component.
8.
Click return.
Step 4: Assign different thicknesses and FLC curves 1.
Click Setup > Components.
2.
Click component: and select comp1.
3.
Click material and select CRDQ steel.
4.
Click thickness = and type 1.0.
5.
Click update. Notice the message bar shows "The component has been updated." You have associated the comp1 component with the CRDQ steel material and a thickness of 1.0.
6.
Repeat steps 1- 5 and re-associate the comp2 component as shown in the table below: Component 1
Component 2
Name : comp1
Name : comp2
Material : CRDQ Steel
Material : Steel 1
FLD curve : Default_FLC (Blank)
FLD curve : FLD curve
Thickness : 1.0
Thickness : 2.0
Color : color green
Color : color blue
Note:
comp1 is assigned the Default_FLC curve (blank) and comp2 is assigned the user defined FLD curve
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7.
Click return.
Step 5: Run the analysis and post-process the results 1.
From the File menu, click Save As.
2.
Browse for a user defined location and name the file as laser_weld_complete.hf.and click Save.
3.
From the Setup menu, click Run Analysis.
4.
Click run analysis.
5.
Click load results.
6.
From the Utility Menu, under Results, use all the functionalities for reviewing results.
7.
Review the results of the laser-welded blank.
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HF-1050: Trim Line Layout This feature allows you to track a line between the stamped part and the initial undeformed blank to minimize material waste (part to blank). It also allows you to map trim lines between the intermediate stages of stamping such as between the final flanged stage and the prior drawn stage (part to part). The tutorial is divided into two exercises: Exercise 1: Trimming the Line Layout In this exercise, you will study the difference between the final part to the undeformed blank and generate IGES data for a trim line selected from the part and mapped onto original blank. Exercise 2: Mapping the Trim Line from Final Part to Intermediate The purpose of the part-to-part line mapping is to allow you to map a line (or node list) between a final part and an intermediate part. This tutorial uses the line mapping panel.
Exercise 1: Trimming the Line Layout This exercise uses the model file part_blanktrimline.hf
Step 1: Load the model file 1.
From the File menu, click Open.
2.
Browse to the file \tutorials\mfs\hf\1Step\part_blanktrimline.hf.
3.
Click Open.
Step 2: Save the file and load the result 1.
From the File menu, click Save As.
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2.
Browse for a user defined location and name the file as part_blanktrimline_complete.hf.and click Save.
3.
Click Setup > Run Analysis.
4.
Click run analysis. Notice that HyperForm is solving the analysis.
5.
When the analysis is finished, click load results.
6.
Click return to close the panel.
Step 3: Map the trim line on the blank 1.
From the main panel area, select the Line Mapping panel and the part to blank subpanel.
2.
Click line and select the line on the final part shape as shown in the figure. Note:
This line is the one that will be mapped on to the flat blank.
3.
Click comps and select final_part as your flange part:.
4.
Click initial to display the original points with respect to the undeformed blank.
5.
Click return to close the panel.
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Note:
The trim line can be exported as IGES data externally.
Exercise 2: Map the trim line from the final part to the intermediate part This exercise uses the model file part_parttrimline.hf
The purpose of the part-to-part line mapping is to allow you to map a line (or node list) between a final part and an intermediate part. This method can be useful for predicting where a part should be trimmed prior to a flanging operation. For example, if you have a part that is made using three operations (1st draw, trim, and 2nd draw), and you want to predict where the flange line should be trimmed prior to the 2nd draw, you can use the line mapping (part to part) feature. To do this, you will need to model the part shape at the end of the 1st draw (intermediate shape) and at the end of the 2nd draw (final shape). Both of these parts should be modeled in the same HyperForm file. After performing the 1Step analysis and loading the results file, the line mapping function can be used. The flange line should be defined on the final shape and trim part elements should belong to the intermediate part.
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Step 1: Retrieve the file 1.
From the File menu, click Open.
2.
Browse the to file \tutorials\mfs\hf\1Step\part_parttrimline.hf
3.
Click Open.
Step 2: Review model setup 1.
Click Setup > Components to review the two components. Note:
2.
You have two components that represent the intermediate and the final part.
(optional) Click the letter D to open the Display panel. Change the entity selection to loadcols to see how the parts have been constrained. Note:
This prevents the parts from moving with respect to each other.
Step 3: Save the file and load the result 1.
From the File menu, click Save As.
2.
Browse for a user defined location and name the file part_parttrimline_complete.hf.and click Save.
3.
Click Setup > Run Analysis.
4.
Click run analysis.
5.
When the analysis is finished, click load results.
6.
Click return.
Step 4: Map the trim line 1.
From the main panel area, select the Line Mapping panel and select the part to part option.
2.
Pick the nodes or line you want to map as your flange line. You can select the line in the ^feature component.
3.
Click trim: comps and select the intermediate_part component.
4.
Click flange part: comps and select final_part component.
5.
Click map. Notice a mapped line is generated and stored in the ^Mapping_line component.
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Line mapping Part to Part
Return to Radioss One Step Tutorials
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Incremental Analysis The following tutorials are available:
HF-3000: Introduction to Incremental HF-3001: Auto Process HF-3002: User Process HF-3003: Setting Up a Multi Stage Simulation from the User Process HF-3010: Simple Draw Forming HF-3020: Combined Binderwrap and Draw Forming Analysis HF-3030: Drawbead HF-3040: Springback HF-3050: Trimming HF-3060: Gravity HF-3070: Redraw HF-3080: Multi-stage Manager HF-3090: Tube Bending HF-3100: HydroForming HF-3110: Blank Optimizer
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HF-3000: Introduction to Incremental_Radioss and Incremental_Dyna In this tutorial, you will learn the fundamentals of Incremental_Radioss and Incremental_LsDyna using HyperForm.
Tools The table below lists the tools used in Incremental_Radioss and Incremental_LsDyna analysis: Tool
Function
Sections panel
Creates section properties for a component and define the corresponding thickness
Materials panel
Creates the material properties for a rigid tool or a deformable blank Creates a hardening curve corresponding to the stress-strain behavior of the deformable blank based on a power law or as a set of points from an external file
Components panel
Creates a component and prescribe the corresponding elements, section and material properties. A toggle switch enables adaptive meshing for a deforming blank if required.
Loadcols panel
Creates a load collector that may hold applied velocities, forces, or constraint conditions
Curves panel
Creates a curve by inputting the data in the available fields or by reading an external file Reviews or modifies any curve inside the current model using the internal function
Tool Build panel
Several tool creation and positioning options: The auto build/setup function automatically creates additional tools by offsetting, creates material definitions, creates contact definitions and auto positions the tools. The tool offset function creates a new mesh component by offsetting elements of another. The auto position function positions two or more components until they are just in contact.
Tool Motion panel
Allows you to prescribe the motion of the tools. It automatically calculates the velocity curve and termination time for a moving tool based on its expected travel and maximum velocity. The history function automatically calculates a time step for a stable and accurate solution and also allows you to prescribe the intervals at which the results are output.
Tool Loads panel
Allows you to prescribe a force to a specified rigid tool. In
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Incremental_LsDyna, it allows you to choose rigid body stoppers to limit the displacement and velocity in order to minimize the inertial effects for the rigid tool under a specified force. Drawbeads panel
Allows you to set up analytical drawbeads that create restraining condition during stamping. The inputs for the drawbead forces can either be numbers corresponding to the restraining and closure force or you can just prescribe it as a percent of the locking force. The calculate function computes analytically, the restraining, closure and locking force as well as the geometry that causes locking based on a prescribed drawbead geometry, material properties and friction conditions for the deforming blank.
136
Contacts panel
Allows you to set up contact condition between a single pair of components or multiple sets of components.
Penetration panel
Allows you to check components for contact surface penetrations. It also allows you to determine how much penetration is occurring and move the penetrating nodes in order to eliminate the penetration.
Advanced panel
Allows you to set up advanced forming processes. Trimming and springback can be setup in the Incremental_Radioss user profile. Gravity, springback, trimming, coarsening, and mapping can be setup in Incremental_LsDyna profile.
Run Analysis panel
Allows you to automatically create the input file and interactively submit the job for a Radioss/Ls-Dyna analysis. A summary sheet can be invoked which will show a brief overview of the input data. A preview animation of the tool motion is possible from this panel. An option to write out a sta/ dynain file with the mesh and adaptivity data as well as thickness, stresses and plastic strain can be toggled from this panel.
Load Result panel
Allows you to automatically invoke HyperView for visualizing the results corresponding to the current model. HyperView is a high performance visualization tool with a multitude of features to help review metal forming analysis results.
Auto Process
Macros for automation of stamping process setup. All the Incremental_Radioss and Incremental_LsDyna forming processes can be easily set up and reviewed.
Multi-stage Manager
Macros for automation of multi-stage forming process set up.
HyperMorph
The HyperMorph module allows users to alter models in useful, logical, and intuitive ways while keeping mesh distortion to a minimum. Any morphed operation can be saved as shape entities for performing shape optimizations afterwards.
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HyperStudy
An integrated optimization, DOE, and robustness engine. All forming analysis result can directly transferred to HyperStudy. Hyperstudy in the Incremental_Radioss user profile can be accessed from Applications menu.
Process Manager
Pre-defined standard work processes. It enables you to rapidly develop and deploy process automation applications for standard product engineering practices within the HyperWorks environment.
Section 1: Introduction to Incremental_Radioss and Incremental_LsDyna Forming Analysis
This section introduces the HyperForm Incremental Interface for setting up an incremental metalforming analysis using Radioss / Dyna. The HyperForm Incremental_Radioss user profile provides a customized interface to set up an incremental metal forming analysis using RADIOSS,and the Incremental_LsDyna profile provides a customized interface to set up an incremental metal forming analysis using LS-DYNA. You can accurately model forming processes. Instead of modeling just the final part shape, as in One-Step metal forming analysis, this uses a more rigorous modeling approach. As the name implies, small solution steps or increments are taken to solve the problem. In this way, the incremental method allows you to accurately model important metal forming processes (for example: binderwrap, single or multi-stage forming, trimming, and springback). Solving a problem incrementally allows you to detect the stage at which the process defects (for example: wrinkles, thinning or tears) occur in the blank. You can then take corrective action to eliminate these defects by modifying the process in various ways (for example: changing tool loads, tool motion, or tool shape). The Incremental method allows you to represent all tool surfaces, prescribe the tool motions, apply tool loads, define material properties of the blank, and model the contact interaction between the tools and the blank.
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Section 2: The interface The Incremental_Radioss and Incremental_LsDyna user profiles support incremental metal forming analysis using the RADIOSS and LS-DYNA solver. Panels help set up the following input conditions for an incremental analysis in a highly automated fashion. You can define: Input parameters, such as material properties for a deforming blank The relative position and contact condition of the stamping tools Process conditions such as tool kinematics, drawbeads. and blankholder tonnage Automatic process for multi stage forming operations Optimization Result evaluation and mapping
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Incremental_Radioss panel
Section 3: Process Macros
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Application All the incremental macros are located on the Radioss & Dyna page of the macro area (lower-right-hand side of the HyperForm window). These macros allow you to more easily setup different application types, such as: Form – 1st forming operation setup Multi – 2nd or nth forming operation setup Trim – Trimming operation setup Coarse – Coarsening of blank mesh setup Sprbk – Springback setup Grav – Gravity setup Bend – Tube bending setup Hydro – Hydro forming operation setup Blank Optimizer – Generate a new blank shape based on the applied deviation represented by a reference trim line Model
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Macro panels are used to load model, remove holes and mesh tool (R-Mesh) and blank (B-Mesh) Setup The setup process will change according to the application type chosen. The sequence of tasks starts from the top and guides you through each step included in the specific application type. Further explanation of each application type will be provided in later chapters Results Allows users to generate a report in selected types and styles. Advance report can allow user to interactively zoom in, animate, rotate and contour plot a model in Microsoft PowerPoint.
Return to Incremental_Radioss Tutorials
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HF-3001: Auto Process In this tutorial, you will learn about Auto Process . This macro allows you to set up a model for incremental stamping simulation for RADIOSS/LS-DYNA with a minimal amount of input. The Auto Process panel leads you through two major steps: Setup and Detail Setup
The first step is to select the analysis type, and specify the essential input parameters for the analysis in the fields that are available in the dialog. The blank and tools of the forming process have fields to fill in the different values for each of these. After you have provided the required data, you can click the Auto Position button to automatically adjust the position of the tools. The Apply button saves the current tool and blank settings, generate load curves and create the input files for Radioss solver. After the process is defined, you can verify that the tool motion is correctly defined by reviewing animation control.
Details
Review the setup, and make modifications to the input data.
This tutorial assumes that you are familiar with basic HyperMesh functionality such as geometry cleanup, meshing, and mesh editing. If you need help on these topics, please refer to the corresponding HyperMesh tutorials in the online help. This tutorial includes the following exercises: Exercise 1: Set Up the Model for an Incremental Analysis Exercise 2: Review Process Setup Details Exercise 3: Run the Analysis
Tools This tutorial uses the Auto Process macro, which is available in the Incremental_Radioss and Incremental_LsDyna user profiles. This macro appears in the Tools menu. Note:
You can choose to set up the simulation either in Radioss or Dyna. However you should not switch between Radioss and Dyna in the middle of the set up. To setup an analysis for Dyna, the methodology is similar to the one described below. You will need to use the Incremental_LsDyna user profile.
Exercise 1: Set Up the Model for an Incremental Analysis This exercise uses the model file, forming_autoprocess.hf. Details about reviewing this model will be discussed later in this chapter.
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Step 1: Load the file 1.
From the File menu, click Open.
2.
Browse to the file \tutorials\mfs\hf\incremental\forming_autoprocess. hf.
3.
Click Open.
Step 2: Open and review the Auto Process macro 1.
Click on the Single Action Draw message that displays.
icon located above the graphics area. Click OK to the error
The Autoprocess macro with the default settings is displayed, as shown below. Note: The current forming process type is set to Double Action Draw, which is the default. This setting can be changed according to your needs inside the macro. Components are recognized if the names are identical (or have common letters) to the tool nomenclature in the macro. (Blank, Die, Punch and Binder). The colors of the components are picked up by the schematic of Single Action Draw inside of Auto Process. Parts that are not recognized appear with dashed lines within the Auto Process image.
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Step 3: Position the die, punch, binder, and blank 1.
Check to ensure that the Process field is set to Single Action Draw.
2.
For Draw beads: select No.
3.
For Symmetry/Constraints: select –x (Symmetric to YZ plane).
4.
For Draw direction: select –z. Note: In single action draw, the die closes in by following the negative Z direction.
5.
For Motion type:, select Velocity. Note: Tool motion will be described using velocity rather than displacement.
6.
Verify that the file type in the Source column next to Blank1, Die, Punch and Binder is HF. (You have two options: HF and Geometry file. For Blank1, in addition, you have the STATE file. )
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7.
Use the pull down selector in the Component column to pick sheet for the Blank1 field; Top for the Die field; Punch for the Punch field and Binder for the Binder field. Notice the components are recognized with solid line in the Auto Process image.
8.
Click on the Autoposition button.
9.
In the warning dialog that appears, click Proceed and then click Apply to use the tool travel values calculated by the utility. To use values that are user-defined, click Cancel. Click on the tool names under the Name column to activate the column headings for the selected tool and enter the desired values in the travel fields. Click Apply.
Step 4: Review blank parameters 1.
Click the space next to Blank1 to activate the arrow the blank component.
2.
Define material and thickness for the blank with the following:
. This enables you to modify all parameters within
Material: Associated material to the blank (default CRDQ steel)
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Thickness: Blank thickness in (mm). Enter 1.0. 3.
Click on the Autoposition button.
4.
Note that: Travel distances are calculated and the respective boxes are populated accordingly. All tools are moved to appropriate locations so that they just touch the blank, as shown in the image below.
Note:
In order to use your own values for tool travel and velocity, simply edit the values in the respective boxes and click the Apply button without clicking Autoposition.
Step 5: Review die parameters 1.
Click the space next to Die to activate the arrow Die component motion setup.
This enables you to modify all parameters within the
Travel 1: The distance the die travels towards the binder (mm) Velocity 1: The velocity at which the die travels towards the binder. The suggested velocity is 4000 mm/s. Travel 2: The distance the die travels towards the punch (mm). Enter 70.0. Velocity 2: The velocity at which the die travels towards the punch. The suggested velocity is 10000 mm/s.
Step 6: Review punch parameters 1.
Click the space next to Punch to activate the arrow Punch component.
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Clearance: The distance between the punch and the blank at the initial configuration. Leave it set at 0.0.
Step 7: Review binder parameters 1.
Click the space next to Binder to activate the arrow Binder component.
This enables you to modify all parameters within
Type: The type can be either Force, or Gap: Force: In this method, a force is applied to keep the binder closed. Gap: Gap (mm) is defined as the actual physical distance between the binder and die that is maintained after the binder closure until the draw is completed, after subtracting the blank thickness. 2.
Select the type as Force, and in the Force field, type 100000.
Step 8: Assign and review materials 1.
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Click on the Blank1 line again. Click on the open folder icon database, as shown below:
under Material to open the material
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2.
Click CRDQ in the steel folder. The material data is shown in RADIOSS keyword format along with a curve that corresponds to the stress/strain data. Click the Select button to make the selection. Notes: You can maintain a custom material database. To do so, create the data in RADIOSS keyword format and copy it to: \hm\scripts\hyperform\automation\materialdb\materials\steel To define a user material library for incremental runs, define the following cards: /BEGIN, /UNIT, /MAT, /FUNCT and /END
3.
(Optional) Use any text editor to open and review CRDQ material data in the library. \hm\scripts\hyperform\automation\materialdb\materials\steel\CRD Q.rad #RADIOSS STARTER
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##================================================================== ## ## Radioss Input Deck Generated by HyperMesh Version
: 10.0
## Generated using HyperMesh-Radioss Template Version : 10.0 ## Date: 01-30-2009
Time: 17:56:28
## ##================================================================== /BEGIN CRDQ.rad 51
0
## ## /UNIT/MASS/1.0 /UNIT/LENGTH/1.0 /UNIT/TIME/1.0 ##-----------------------------------------------------------------## Material Law No 43 HILL ORTHOTROPIC (Plasticity defined by a user function) ##-----------------------------------------------------------------/MAT/HILL_TAB/1 CRDQ
7.80000000000000E-09 210000.0
0.3
1.6
1.6
1.6
0.0
1 ##-----------------------------------------------------------------## Functions
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##-----------------------------------------------------------------##HWCOLOR curves 1 11 /FUNCT/1 crdq_stress_strain
0.0
185.0
0.05
293.188135
0.1
339.127251
……………………………………………………… ……………………………………………………… ##-----------------------------------------------------------------## End Of Radioss Block Deck ##-----------------------------------------------------------------/END
4.
Click Close to close the dialog.
Step 9: Model analytical drawbeads using the Drawbeads Editor When Draw beads: is set to yes within the Auto Process macro, you can launch the Drawbeads Editor using the button. The Drawbeads Editor helps you quickly create analytical drawbeads from lines and rapidly manipulate them. You can also edit drawbeads created by clicking on the graphics area. 1.
Within the Auto Process macro, next to Draw beads:, select Yes, which will create the Draw Beads row in the table.
2.
Click the … button
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. This launches the Drawbeads Editor tool.
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The following tools are available on the Drawbeads Editor toolbar: Button
Function In the drop-down menu, select Both to display both the drawbeads and lines in the model representation, Drawbeads to display only the drawbeads in the model representation, or Lines to display only the lines in the model representation. Create a drawbead by clicking points to define the line. When the points are in place, right-click to set the line and create a corresponding drawbead based on the line. Click to add a drawbead to the table. Then complete the fields for the row in the table to define the drawbead. Click lines to select them. Lines appear as blue dashes. When they are selected, they become yellow. Click to add a drawbead for each line.
Click to delete the active drawbead from the table. The active drawbead in the table has a gray arrow next to it.
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Click to delete all drawbeads.
Click on a drawbead in the model to select it. Click a drawbead to select it and then click and drag endpoints to change the size of the drawbead. Click a point on a drawbead to split the drawbead into two drawbeads at that location. Click two drawbeads when the button is selected to combine them into a single drawbead. Click the button to undo the last action in the Drawbeads Editor. You can also right-click to sequentially remove the most recently created points. In the drop-down menu, select: Force to set the force calculation mode as the default, which requires that you supply values for restraining and closure forces. You can also use the Drawbead Calculator to determine values. or %-lock to set the force calculation mode as percent lock, which applies force as a percentage of the required necking force. Click to fit the model to the current window size.
Zoom feature. Click once to fit the model in the window. Click and drag to draw a rectangle to zoom in on that selection area. Click and drag to move the viewing area when the model is zoomed in.
4.
Click the pencil button
5.
Graphically draw a blue line on simplified graphical representation of the model in the top area of the Drawbeads Editor, as shown below.
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6.
After selecting the points, click the create button to complete the first line. Notice the color is changed to yellow and the drawbead table displayed.
7.
Repeat the same steps to create DB2 and DB3 as shown below.
8.
Click on the space left next to DB1. Notice the corresponding drawbead line is changed from green to yellow in graphics region.
9.
Click on the … button after the Tstart column in the same row as DB1. This will open the Drawbead Calculator as shown below.
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10. Accept the current settings and click . Notice all the resultant conditions are calculated for the given geometry, blank material, and thickness.
11. Click Back. Notice calculated restraining force and normal force are automatically filled in. 12. In the Drawbeads Editor, follow the same steps for DB2 and DB3 to input values for all drawbeads. 13. Click the Update button to create the force curves for the drawbeads. 14. Click the Back button to return to the Auto Process setup page. 15. From within the Auto Process macro, click Apply. Note:
In the Model Browser, expand the Component folder. You will find three components: ^db_line for DB1, ^db_line for Db2 and ^db_line for DB3. These components are generated automatically, and correspond to the three drawbeads.
Step 10: Review the animation control The Animation Control field makes it possible to verify that the motion is setup correctly. Click the arrow buttons to move forward or back through the process, and observe how the tools move with respect to the blank in the graphics area.
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1.
From the Auto Process macro module, click
in the animation control field to visualize the tool
positions at the termination of the forming stage. 2.
Click
.
to get the model position back to initial configuration.
Exercise 2: Review in Input Data Step 1: Review items on the Details tab 1.
Click the Details tab.
2.
Click the selector and change to All.
Note: You can select any option to review. 3.
From the Select field, select Die. You can review the attributes of the die by clicking each item in the tree.
4.
In the die attribute tree, review the Velocity Curve as shown in the image below.
5.
The curve is displayed on the right hand side and the values are editable. Click the Preview button to preview the new curve after editing and then click on the Apply button to accept the new curve.
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This picture show s the velocity curve for die.
6.
From the Select field, select Summary.
7.
Click Motion Summary.
8.
Click Force Summary.
9.
From the Select field, select Control.
10. Click on each tree selection and review each topic.
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11. Click Animation: Count: from the tree selection. 12. Click the selector
next to Animation:.
Notice that there are two types result requests: Count: Number of rust types that is desired TFreq: At different time intervals till the end of the simulation .
Exercise 3: Save the File and Run the Analysis 1.
From Auto Process, click Run to start the analysis.
2.
When the Save as window appears, save the file name as forming_autoprocess_complete. Note: This will write out a D00 and D01 file and launch the Radioss solver.
3.
From the File menu, click Save As.
4.
Save the file as forming_autoprocess_complete.hf.
Return to Incremental_Radioss Tutorials
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HF-3002: User Process User Process is a utility that allows you to setup an arbitrary stamping process from scratch. Some of the benefits of User Process are: the ability to set up a unique forming process. The process can be saved as a template that can be retrieved and reapplied with no input or minimal input for a successive setup the flexibility to include any number of tools different orientation of the tools possible tool kinematics that don't need to follow the conventional forming types, such as Single Action Draw, Double Action Draw, etc. When a model is setup in Auto Process, the model definition is captured by User Process as well.
Exercise 1: Set Up the Model for an Incremental Analysis This exercise uses the model file forming_autoprocess.hf.
Step 1: Load the file 1.
Click on and browse the directories to find the file: \tutorials\mfs\hf\incremental\forming_autoprocess. hf.
2.
Double click on the file to load it into the session.
Step 2: Define process parameters 1.
In the User Process tab, adjust the settings as described below:
2.
Right click on Symmetry and select –X.
3.
Double click on Animation: Count and change the Count: value to 15.
4.
Leave the Draw direction: field at Z.
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5.
Leave the Motion Mode: field set to Velocity.
6.
Leave the Memory Mode: field set to Automatic.
7.
Right-click on Adaptivity: and select On.
Step 3: Set up the blank parameters Complete the steps below to set up the blank parameters. Use the switch type option to make the component as blank type as explained below 1.
Under the Tools header, right click on Sheet, select Switch type and select Blank as shown in figure below. This will make the sheet component appear below Blanks in the User Process tab.
2.
Under the Blanks heading, right-click on Material and select Database…. The Material Database dialog will display.
3.
In the Steel folder, click on CRDQ and click Select. The material data is shown in Radioss keyword format along with a curve that corresponds to the stress/ strain data.
Notes: You can maintain a custom material database. To do so, create the data in Radioss keyword format and copy it to: \hm\scripts\hyperform\automation\materialdb\materials\steel To define a user material library for incremental runs, define the following cards: /BEGIN, /UNIT, /MAT, /FUNCT and /END (Optional) Use any text editor to open and review CRDQ material data in the library. \hm\scripts\hyperform\automation\materialdb\materials\steel\CRD Q.rad #RADIOSS STARTER ## ## Radioss Input Deck Generated by HyperMesh Version
: 8.0SR1
## Generated using HyperMesh-Radioss Template Version : 8.0sr1
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## Date: 08-07-2007
Time: 17:56:28
## ##================================================================== /BEGIN CRDQ.rad 51
0
## ## /UNIT/MASS/1.0 /UNIT/LENGTH/1.0 /UNIT/TIME/1.0 ##-----------------------------------------------------------------## Material Law No 43 HILL ORTHOTROPIC (Plasticity defined by a user function) ##-----------------------------------------------------------------/MAT/HILL_TAB/1 CRDQ
7.80000000000000E-09 210000.0
0.3
1.6
1.6
1.6
0.0
1 ##-----------------------------------------------------------------## Functions ##-----------------------------------------------------------------##HWCOLOR curves 1 11 /FUNCT/1 crdq_stress_strain
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0.0
185.0
0.05
293.188135
0.1
339.127251
……………………………………………………… ……………………………………………………… ##-----------------------------------------------------------------## End Of Radioss Block Deck ##-----------------------------------------------------------------/END
Note: 4.
An easy way to create your own material would be to substitute your data into an existing material and save it under a new name
In the User Process tab, double click on Thickness: 1.0 and change the value to 1.5.
Step 4: Set up the tools parameters The Die in this exercise is named Top. 1.
Use the switch option to ensure this component is set as tool type.
2.
Under the component Top, right-click Contacts, select New Contact and sheet as shown in figure below. This will create a contact between the blank and the tool named Top.
3.
Right click on the Position and select Above as shown in the figure below:
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4.
Right click on Loads: and select New Motion as shown below.
5.
Double click on Motion: Motion1 to make it editable. Rename it as Punch_Motion1.
6.
Right click on Mating Part and select Binder as shown in the figure below.
7.
Right click on Loads: and select New Motion. Double click on Motion: Motion1 to make it editable. Rename it as Punch_Motion2.
8.
Right click on Punch_Motion2 and select Properties as shown below.
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10. Select options as shown below in the Details tab of Properties dialog and click OK.
11. Right-click on the component name Binder and make sure that Switch type is set as Tool. 12. Under the component Binder, right-click Contacts and select New Contact and select sheet. This will create a contact between the blank and the Binder. 13. Right click on Position and select Below. 14. Right click on Loads: and select New Motion. Double click on Motion: Motion1 to make it editable.
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Rename it as Binder_Motion. 15. Right click on Binder_Motion and select Properties. 16. Select options as shown below in the Details tab of Properties dialog that pops up and click OK.
17. Right-click on the component name Punch and make sure that the Switch type is set to Tool. 18. Under the component Punch, right-click Contacts and select New Contact and select sheet. This will create a contact between the blank and the Punch component. 19. Right-click on Position and select Below.
Step 5: Model analytical drawbeads using the Drawbead Editor 1.
From the User Process tab, right-click on Drawbeads and select Edit Drawbeads....
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Drawbeads Editor Toolbar The following tools are available on the Drawbeads Editor toolbar. Button
Function In the drop-down menu, select Both to display both the drawbeads and lines in the model representation, Drawbeads to display only the drawbeads in the model representation, or Lines to display only the lines in the model representation. Create a drawbead by clicking points to define the line. When the points are in place, click Create to set the line and create a corresponding drawbead based on the line. Click to add a drawbead to the table. Then complete the fields for the row in the table to define the drawbead. Click lines to select them. Lines appear as blue dashes. When they are selected, they become yellow.
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Click to add a drawbead for each line. Click to delete the active drawbead from the table. The active drawbead in the table has a gray arrow next to it. Click to delete all drawbeads. Click on a drawbead in the model to select it. Click a drawbead to select it and then click and drag endpoints to change the size of the drawbead. Click a point on a drawbead to split the drawbead into two drawbeads at that location. Click two when the button is selected to combine them into a single drawbead. Click the button to undo the last action in the Drawbeads Editor. In the drop-down menu, select: Force to set the force calculation mode as the default, which requires that you supply values for restraining and closure forces. You can also use the Drawbead Calculator to determine values. or %-lock to set the force calculation mode as percent lock, which applies force as a percentage of the required necking force. Click to fit the model to the current window size.
Zoom feature. Click once to fit the model in the window. Click and drag to draw a rectangle to zoom in on that selection area. Click and drag to move the viewing area when the model is zoomed in.
2.
Click the pencil button
3.
Graphically draw a blue line on simplified graphical representation of the model in the top area of the Drawbeads Editor, as shown below.
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4.
After selecting the points, click the create button to complete the first line. Notice the color is changed to yellow and the drawbead table is displayed.
5.
Repeat steps 2- 4 to create DB2 and DB3 as shown below.
6.
Click on the space left of DB1 under the Name column. Notice that an arrow appears and the corresponding drawbead line is changed from green to yellow in graphics region.
7.
Click on the … button after the Tstart column in the same row as DB1. This opens the Drawbead Calculator, as shown below.
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8.
Accept the current settings and click . Notice all the resultant conditions are calculated for the given geometry, blank material, and thickness.
9.
Click Back. Notice calculated restraining force and normal force are automatically filled in.
10. In the Drawbeads Editor, follow the same steps for DB2 and DB3 to input values for all drawbeads. 11. Click the Update button to create the force curves for the drawbeads. 12. Click the Back button to return to close the Drawbeads Editor. Note:
In the Model Browser, expand the Components folder. You will find three components: ^db_line for DB1, ^db_line for Db2 and ^db_line for DB3. These components are generated automatically, and correspond to the three drawbeads.
Step 6: Prepare the model to run 1.
Right click anywhere inside the red boundary and select Autoposition as shown below:
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The status of auto positioning is shown and updated at the left hand bottom corner of the window. Done indicates that tools have been successfully positioned with respect to blank. 2.
Right click any where in the red boundary as shown in the above figure and select Create Input. This will create a Radioss input deck which consists of 2 files: _0000.rad and _0001.rad
3.
Under Binder, and under Loads, double-click on the Distance: field to make it editable. Enter -70 as a new value.
4.
Right click any where in the red boundary as shown in the above figure and select Check Model. This will check the model for any errors. This option also brings up a box which has The Sequence tab will show the tool kinematics sequence The Messages tab will show errors in the setup, if any. Preview animation of the tool kinematics
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5.
Click on the Binder motion curve block to highlight the border with thick black line.
6.
Click and drag the thick black border line to change the tool motion interactively.
7.
In the figure below, the Binder motion curve block is dragged to start at a different time. Notice the change in the end time from the original 0.00928 to 0.0105 as shown in the red box on the right hand bottom corner in the picture below.
8.
After modifying the curve, use the Create input option as explained in step 2 to update the curves in the input file.
9.
Right click any where in the red boundary as shown in the figure under point 1 and select Export… to export the D00 _0000.rad and _0001.radD01 file. Run… will generate _0000.rad, _0001.rad D00 D01 files and run Radioss.
10. Right click on Process and select the Save As Process… option as shown below:
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11. Enter User_Process in the file browser and click on Save.
Exercise 2: Retrieve the Saved Process to Setup a Second Model This exercise will make use of the model Forming_ReUse_User_Process.hf
Step 1: Load the HyperForm file 1.
Click on File and select Save As… to save the existing file in the session
2.
Click on the New .hm File icon . This deletes the existing model from the session. Note that the parameters under the process tree is empty
3.
Click on Open Folder icon click to open the file.
4.
Right click on Process and select Load Process… as shown below.
5.
Browse for the file User_Process.up and double-click the file. A dialogue box appears as shown below. Click OK to bring the process file into HyperForm session.
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and browse for the file Forming_ReUse_User_Process.hf. Double-
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Notice that the process tree gets populated as per the settings of the imported process file.
Step 2: Set up a second stamping model using the retrieved process file The model and the retrieved process in the session look as below: 1.
Right click on Symmetry and select No.
2.
Right click on the component name Sheet and select Component and select Part.
3.
Right click on the component named Top and select Component and select Die.
4.
Right click on the component named Die and select Component and select Binder.
5.
Right click on the component named Punch and select Component and select Punch.
6.
Follow points 1 through 6 of step 5 from Exercise 1 to Autoposition, create input, export and run the model.
Return to Incremental Tutorials
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HF-3003: Setting Up a Multi Stage Simulation from the User Process This tutorial will take you through the process of setting up a multi stage simulation from within the User Process tab. To complete this tutorial, you should have HyperForm opened with the Incremental_Radioss user profile loaded. This exercise uses the model file multistage_gravity_radioss.hf.
Step 1: Set the root directory and enable the Multi Step option 1.
In the User Process tab, right click on Process: Default Process and select MultiStep > Enable as shown below:
2.
Right-click on Base Directory: and select set to select the directory where you want to store the results of forming sequence.
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A new tab named Stage 1 with a default forming template appears below the User Process tab, as shown below. The options under this tab are similar to the User Process single stage forming setup.
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Step 2: Set up the Multi Stage simulation The forming sequence in this example is Gravity, Double Action Draw and Trimming. Gravity: 1.
Right click on Process Type: and select Gravity from the menu. This will load the gravity options in the User Process tree.
2.
Right click on Stage1: Gravity and select Activate.
3.
Click File > Open and browse to the file /tutorials/mfs/hf/Incr/ multistage_gravity_radioss.hf
4.
Click on Gravity icon
in the toolbar.
This will open the Auto Process function with the Gravity template loaded. 5.
In the table, in the Component column, click on the drop down arrow in the Tooling row and select Die from the list
6.
Review the default settings. Click on Autoposition, and then click on Apply. Notice that the set up is captured by populating the options in the User Process tree.
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Double Action Draw: 7.
Right click on Stages and select Add Stage as shown
This will create a second tab named Stage 2. 8.
Right click on Stage 2: Forming and select Activate. Notice that the gravity model settings are masked and the User Process tree becomes empty. Click on the Stage1 tab to see the gravity model and its setup.
9.
Load the model multistage_double_action_draw_radioss.hf from the same location as indicated in Step 2.
10. Right click on Process: multistage_double_action_draw_radioss.hf and select Load Process from the
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menu. This will take you to a location in the installation where templates for common forming operations are available 11. Select the file dad.up and click Open. This populates the User Process tree with typical double action draw settings. 12. Right click on blank under Blanks and select Component > Stage 1 > Blank. This is to tell the process to look for the blank from the previous stage.
Trim: 13. Right click on the Stages and select Add Stage. 14. Right click on Stage 3: Forming and select Activate. 15. Right click on Process type: Forming and select Trimming from the list. 16. Click on File > Import > Geometry to import the file multistage_trim_line.iges from /tutorials/mfs/hf/Incr/. 17. Right click on blank under Blanks and select Component > Stage 1 > Blank. 18. Right click on Trim Lines and select Trim Outside as shown below
19. Click on the Stage 1 tab. 20. Right click on MultiStage and select Run to start the multi step forming sequence.
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This tutorial is now complete.
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HF-3010: Simple Draw Forming In this tutorial, you will learn the basic draw forming setup procedure using a simple box forming process. This tutorial assumes that you are familiar with basic HyperForm modeling functionalities, such as geometry cleanup, meshing, and mesh editing. If you need help on these topics, please refer to the corresponding tutorials in the online help.
Tools The following options are used in this tutorial can be accessed from the Setup menu: Sections panel Materials panel Components panel Tool Build panel Tool Motion panel Tool Loads panel Save panel Run panel
Exercise: Basic Draw Forming Analysis This exercise uses the model file forming.hf.
Step 1: Load the HyperForm file 1.
Click on and browse the directories to find the file \tutorials\mfs\hf\incremental\forming.hf.
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2.
Click Open.
Step 2: Create blank section properties 1.
Click Setup > Sections.
2.
In the section: field, type blank_section.
3.
In the thickness= field, type 1.0.
4.
Click card image: and select the respective card image from the list. Note:
For Radioss select SH_ORTH as the card image. For Dyna, select SectShll as the card image.
5.
Click create.
6.
Click return.
Step 3: Create blank material properties 1.
Click Setup > Materials.
2.
In the material: field, type CRDQ_steel.
3.
Click card image:, and select the respective card image from the list: Note:
For Radioss, select HillOrthotropic Tabulated as the card image. For Dyna, select TransAnsioElasticPlastic as the card image.
4.
Click import curve.
5.
In the curve: field, type stress_strain_curve.
6.
In the sigy = field, enter 185. (MPa)
7.
In the k = field, enter 550. (MPa)
8.
In the n = field, enter 0.21.
9.
Click create.
10. Click back. 11. Click create. 12. Click on add to database. A folder browser appears allowing you to browse for a folder into which the newly created material file will be saved. This is a one time operation for every new material created, after which you can access the material using the Material Database option under the Setup menu.
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13. Click OK to close the folder browser. 14. Click return to close the Materials panel.
Step 4: Assign section and material properties for the blank component 1.
Click Setup > Components.
2.
Double-click component: and select blank.
3.
Click section: and select blank_section.
4.
Click material: and select CRDQ_steel.
5.
Select the adaptive checkbox. Note: For Radioss:
By default a maximum of two levels of adaptivity are enabled and the initial value is set to 0. If the starting element size in the blank is, for example, approximately 8 mm, the smallest element after maximum refinement will be approximately 2 mm. The adaptive levels can be changed by using the Control Cards panel, and editing the AdaptiveGlobalMesh card. The parameter to edit is LevelMax. Refer to the RADIOSS Starter Manual for more detailed information.
For Dyna:
By default a maximum three levels of adaptivity are enabled. In Dyna, the initial level is considered as level 1. If the starting element size in the blank is, for example, approximately 8 mm, the smallest element after maximum refinement will be approximately 2 mm. The adaptive levels can be changed by using the Control Cards panel, and editing the Adaptive card. The parameter to edit is MAXLVL. Refer to the Dyna manual for more detailed information.
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6.
Click update.
7.
Click return.
Step 5: Display only the die component 1.
In the Model Browser, expand the Component folder.
2.
Right-click on the Component folder and select Hide.
3.
Right-click on the die component and select Show. The die component appears on the screen.
Step 6: Build the punch and binder components 1.
Click Setup > Tool Setup.
2.
Select the Build and setup tool from DIE surface subpanel.
3.
For Machine Type, choose Double acting.
4.
Click on the yellow Elements button in the Binder Source: field. The element selector panel appears.
5.
Click elems and select on plane.
6.
If necessary, click the switch to the N1, N2, N3 and B option. Pick four nodes on the binder for N1, N2, N3 and B as shown below.
7.
Click Select entities, and then select proceed.
8.
Click Build. This will extract the punch and binder surface from the die cavity.
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9.
Click Close.
Note: Note after execution, binder and punch components are generated. The punch offset amount is set using the blank thickness value. The punch offset is calculated to be thickness plus 20% (Default tolerance). In this case, it is 1.1*2.0 mm = 1.2 mm. This Tool Build macro creates blank and tool sections and tool materials. In case these are already created, it will be updated. It also creates 3 contacts viz between blank-die, blank-punch and blank-binder
Step 7: Set a top view of the blank 1.
In the Model Browser, for each component, click on the mesh icon to turn the mesh display off in the model for all components except blank.
2.
From the toolbar, click the user view
3.
Click top.
icon.
Step 8: Define symmetry plane constraints 1.
Click Setup > Symmetry Plane.
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2.
Under Select symmetry plane, select YZ.
3.
Click create.
4.
The node selector panel appears. Pick a node on the symmetric plane of the blank (right-hand edge).
5.
Click proceed.
6.
Click Close.
Step 9: Set an iso view and display all the components 1.
From the toolbar, click the user view icon.
2.
Click iso 1.
3.
Using the Model Browser, click on the mesh icons on the components to turn their display back on.
Step 10: Define the tool motion 1.
Click Setup > Tool Motion.
2.
Click moving tool and select the punch component.
3.
Verify all options (on the right-hand side) are set to translation velocity linear termination, load curve and loadcol are also checked.
4.
Click max velocity and type –5000. (mm/s)
5.
Click total travel and type 69.2. (mm) Note The total travel is distance the punch travels to close in on the die. This value is the distance between the punch and die, minus the blank thickness and a tolerance (Default is set to 20% of blank thickness). This distance between the punch and die are calculated using the Distance (F4) panel (Try to select, identical nodes on the die and punch). Total Travel = Distance Punch to Die – (Blank thickness + 20% Blank Thickness) Total Travel = 70.4 – (1.0 + 0.2) = 69.2
6.
Click set up.
7.
Complete the following steps for Dyna only: – Click the history subpanel on the left. – Click cycles/travel and type 500. (cycles / mm of tool travel)
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– Click update. – Notice timestep is changed to 4.000e-7. The following message appears: "history was updated successfully." – Click motion. – Click update. 8.
Click return.
Step 11: Update the contact with punch motion 1.
In the Model Browser, expand the Group folder.
2.
Right click on punch_to_blank and select Card Edit.
3.
Drag the tabs all the way to the bottom as shown in red box in the image below:
4.
Click the Number of Load Collectors toggle and select 2. This will add a second load collector selector as shown in the red box in the image below:
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5.
Click the button loadcollector_ids(2) and select loadcol_IMP-punch.
6.
Click return.
Step 12: Define the binder load For Radioss: 1.
From the Setup menu, click Tool Load.
2.
Click tool = and select Binder.
3.
Click tool force and type -100000. (N)
4.
Under setup option: make sure both load curve and CLOAD_Collector are checked.
5.
Click setup.
6.
Click return.
For Dyna: 1.
From the Utility Menu, under Setup, click Tool Load.
2.
Click tool = and select Binder.
3.
Click tool force and type -100000. (N)
4.
Click max velocity and enter 500. (mm/s)
5.
Click setup. The following message appears: "Tool load was set up successfully." Note:
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A force of 100kN is applied to the binder. A rigid body stopper limits the maximum velocity of the binder in order to minimize inertial effects. For more information about rigid body stopper,
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refer to HyperForm's FAQ section. 6.
Click return.
Step 13: Update the contact with binder load 1.
In the Model Browser, under the Groups folder, right click on binder_to_blank and select Card Edit.
2.
Drag the tabs all the way to the bottom of their respective sections.
3.
Click the Number of Load Collectors toggle and select 2.
4.
Click on the button loadcollector_ids(2) twice and select loadcol_CLOAD-binder.
5.
Click return.
Step 14: Save the analysis setup as forming_complete.hf 1.
From the File menu, click Save As....
2.
Use the file browser to save the file as forming_complete.hf.
3.
Click Save.
Step 15: Review the animation and run the analysis For Radioss: 1.
From the Setup menu, click Run Analysis.
2.
Click create sta file. Note:
3.
At the end of the computation, Radioss will write out a file called "sta". This file contains all the thickness, stress and strain information necessary to perform subsequent operations. This file is essential for performing multi-stage setups.
Click animation. Note:
4.
Animation feature enables you to review and correct the tool motion.
Click run to start the computation in Radioss.
For Dyna: 1.
From the Utility Menu, under Setup, click Run.
2.
Click create dynain.
3.
Click applied comps:comps and select blank.
4.
Click select.
5.
Select the DYNA checkbox to enable DYNAIN output.
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6.
Click setup. A message appears stating: "Dyna3d was set up successfully." Note:
At the end of the computation, Dyna will write out a file called "dynain". This file contains all the thickness, stress and strain information necessary to perform subsequent operations. This file can be read directly by HyperForm and is essential for performing multi-stage setups.
7.
Click return.
8.
Click animation. Note:
9.
This animation feature enables you to review and correct the tool motion.
Click dyna file and type forming_complete for the name.
10. Click run. A Dyna input file named forming_complete.bdf is generated. The file can be submitted to Dyna.
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HF-3020: Combined Binderwrap and Draw Forming Analysis This tutorial illustrates a combined binderwrap and draw forming set up procedure. A setup file containing the die mesh provides a starting point. All tool components are generated from the die tool mesh. Appropriate material and section properties are assigned to each component. In this tutorial, you will learn about: Double action forming processes Importing a HyperForm file Birth and death time concepts
Tools The following options used in this tutorial can be accessed from the Setup menu: Sections panel Materials panel Comps panel Tool Build panel Tool Motion panel Tool Loads panel Save panel Run panel
Exercise: Performing a Combined Binderwrap and Draw Forming Analysis This exercise uses the model file bwrap_form_Radioss.hf file for Radioss and bwrap_form_.hf file for LsDyna and bwrap_form_blank.hf for both profiles.
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Step 1: Load the file 1.
Click on and browse the directories to find the file \tutorials\mfs\hf\incremental\bwrap_form_Radioss.hf file for Incremental_Radioss and \tutorials\mfs\hf\incremental/bwrap_form_.hf file for Incremental_LsDyna
2.
Double click on the file to load into the session.
Step 2: Import a second file 1.
Click the Import icon
2.
Click the Import HM Model icon bwrap_form_blank.hf.
3.
Click Open in the dialog, and then click Import.
Note: 4.
to open the Import dialog. and use the Open File icon
to browse to the file
Import brings the file into the current session without erasing the existing file. Load model brings the model into the current session and will erase the existing file.
Click Close to close the Import dialog.
Step 3: Create blank section properties 1.
Click Setup > Sections.
2.
In the section: field, type blank_section.
3.
In the thickness = field, type 1.0 (mm).
4.
Click card image= and select the respective card image from the list. For Radioss, select SH_ORTH as the card image. For Dyna, select SectShll as the card image.
5.
Click create.
6.
Click return.
Step 4: Create blank material properties 1.
Click Setup > Materials. The Material definition panel displays.
2.
Click material: and enter CRDQ_steel.
3.
Click card image and select the respective card image:
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For Radioss, select HillOrthotropic Tabulated For Dyna, select TransAnisoElasticPlastic 4.
Click import curve.
5.
Click curve: and enter stress_strain_curve.
6.
Click sigy = and enter 185 (MPa).
7.
Click k = and enter 550 (MPa).
8.
Click n = and enter 0.21.
9.
Click create.
10. Click back. 11. Click create. 12. Click on add to database. A folder browser is displayed, allowing you to browse for a folder into which the newly created material file will be saved. This will be a one time operation for every new material created, after which you can access the material using the Material Database option in the Setup menu.
13. Click OK to close the folder browser. 14. Click return to close the Materials panel.
Step 5: Assign section and material properties to the blank component 1.
Click Setup > Components.
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2.
Double-click component: and select blank.
3.
Click section: and select blank_section.
4.
Click material: and select CRDQ_steel.
5.
Select the adaptive checkbox.
6.
Click update.
7.
Click return.
Note:
By default, two levels of adaptivity are enabled. If the starting element size in the blank is, for example, approximately 8 mm, the smallest element after maximum refinement will be approximately 1 mm. The adaptive levels can be changed by using the Control Cards panel, and editing the AdaptiveGlobalMesh card. The parameter to edit is LevelMax. Refer to the RADIOSS Starter Manual for more detailed information.
Step 6: Display a top view of the die component only 1.
Click on the Model tab to display the Model Browser. If it is not available, click on View and select Model Browser to display it.
2.
Expand the Component folder.
3.
Click on the mesh icon as shown in the figure below to turn off the blank mesh.
4.
On the toolbar, click the user views
icon and select top.
Step 7: Build the punch and binder 1.
From the Preferences menu, select Meshing Options.
2.
Click feature angle and enter 2.0 (degrees).
3.
Click return. Note:
Changing the feature angle to 2.0 will make element selection on the binder area easier.
4.
From the Setup menu, select Tool Setup.
5.
Select the Build and setup tool from DIE surface subpanel.
6.
For Machine Type, choose Double acting.
7.
In the Binder Source: field, click Elements. The element selection panel is displayed.
8.
Select one element on the binder area of the die as shown below.
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Figure 1: Element to select
9.
Click elems and select by face option from the extended entity selection. This highlights all the elements on the binder area of the die as shown below.
10. Click proceed. 11. Click Build. 12. Click Close.
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Note: Notice after executing the build, the binder and punch components are generated. The punch offset amount is set using the blank thickness value. The punch offset is calculated to be thickness plus 10%. In this case, it is 1.1*1.0 mm = 1.1 mm. The Tool Build macro creates tool sections and tool materials. If these were already created, they are updated. This macro also creates 3 contacts viz between Blank-Die, Blank-Punch and Blank-Binder
Step 8: Define the tool motion for the binder 1.
Click Setup > Tool Motion.
2.
Click moving tool and select the binder component.
3.
Click max velocity and type –2000 (mm/s).
4.
Click total travel and type 5.7 (mm). Note:
The total travel of the binder is the distance the binder has to travel rest on the die holding the blank. This value is the distance between the binder and die, minus the blank thickness and a tolerance (typically 10-20%). This distance between the binder and die are calculated using the Distance (F4) panel. (Try to select identical nodes on the die and binder). Total travel - Distance Binder to Die - (Blank thickness + 20% Blank Thickness) Total travel = 6.9 - (1.0 + 0.2) = 5.7
5.
Verify all options (at right hand side) are set to translation velocity linear termination, load curve and loadcol are also checked.
6.
Click set up.
7.
Click the history subpanel. Note the calculated termination time is T = 4.850e-03 seconds. This time will be used again later in the exercise.
8.
Click the motion subpanel.
9.
Click edit card. – For Radioss, click Tstop field and enter 4.850e-03 (s). – For Dyna, click DEATH time field and enter 4.850e-03(s). This is the time at which the prescribed motion of the binder is killed, and is also the time at which the force load is applied to the binder later in this exercise.
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10. Click return. 11. Click update.
Step 9: Update the contact with binder tool motion 1.
In the Model Browser, expand the Group folder.
2.
Right click on binder_to_blank and select Card Edit.
3.
Scroll all the way to the bottom of the sections as shown in red box in the image below:
4.
Click the Number of Load Collectors toggle and select 2. This will add a second load collector selector as shown in the red box in the image below:
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5.
Click on the button loadcollector_ids(2) and select loadcol_IMP-binder.
6.
Click return.
Step 10: Define the punch tool motion 1.
Click moving tool and select the punch component.
2.
Click max velocity and enter –5000 (mm/s).
3.
Click total travel and type 76.0 (mm). Note:
The total travel is distance the punch travels to close in on the die. This value is the distance between the punch and the die, minus the blank thickness and a tolerance (typically 10-20%). This distance between the punch and die are calculated using the Distance (F4) panel. (Try to select identical nodes on the die and punch.) Total Travel = Distance Punch to Die - (Blank thickness + 20% Blank Thickness) Total Travel = 77.2 - (1.0 + 0.2) = 76.0
4.
Click starting time and enter 4.850e-03. (s)
5.
Select the termination check box to uncheck it.
6.
Click set up.
7.
For Incremental_Dyna only, complete the following steps: – Click the history subpanel. – Click cycles/travel and enter 100 (cycles/mm of tool travel). – Click update. Notice that the timestep is reduced from 4e-7 to 2e-6.
8.
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Click return.
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Step 11: Update the contact with punch tool motion 1.
In the Model Browser, under the Groups folder, right click on punch_to_blank and select Card Edit.
2.
Scroll all the way to the bottom of the sections.
3.
Click the Number of Load Collectors toggle and select 2.
4.
Click on the button loadcollector_ids(2) and select loadcol_IMP-punch.
5.
Click return.
Step 12: Define the binder load For Incremental_Radioss user profile: 1.
From the Setup menu, select Tool Load.
2.
Click tool = and select Binder.
3.
Click tool force and type -200000. (N)
4.
Verify that load curve and CLOAD_Collector are selected.
5.
Click setup.
6.
From the Setup menu, select Curves Editor.
7.
Select the curve CLOAD_curve-binder and enter 4.450e-03 as the first entry of the X axis as shown below: 4.450e-03
0.0
1.0
0.0
8.
Click on Update.
9.
Click on Close.
10. Click return.
For Incremental_Dyna user profile: 1.
From the Utility Menu, under Setup, click Tool Load.
2.
Click tool = and select Binder.
3.
Click tool force and type -200000. (N)
4.
Click max velocity and type 500. (mm/s).
5.
Click birth time and type 4.450e-03 (s). Verify that Load curve, loadrigbod and stoppers are all selected.
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6.
Click setup. A force of 200kN is applied to the binder. A rigid body stopper limits the maximum velocity of the binder in order to minimize inertial effects. This rigid body stopper is defined to be active (note birth time) only after the prescribed motion of the binder has been killed. For more information about rigid body stopper, refer to the FAQs in the HyperForm online help.
7.
Click return.
Step 13: Update the contact with binder load 1.
In the Model Browser, under the Groups folder, right click on binder_to_blank and select Card Edit.
2.
Scroll all the way to the bottom of the sections.
3.
Click the Number of Load Collectors toggle and select 3.
4.
Click on the button loadcollector_ids(3) and select loadcol_CLOAD_binder.
5.
Click return.
Step 14: Update the tool type for die 1.
Click Setup > Components.
2.
Click component and select die.
3.
Click section and select tool_sec.
4.
Click material and select CRDQ_steel.
5.
Select the rigid checkbox.
6.
Click update.
Step 15: Save the analysis 1.
From the File menu, click Save As....
2.
Save the file as bwrap_form1_radioss_complete.hf for Radioss and bwrap_form1_complete.hf for Dyna.
3.
Click save.
Step 16: Review the animation and run the analysis 1.
From the Setup menu, select Run Analysis.
2.
Click animation. Note: Notice the kinematics of the tool motion. This animation feature enables you to review and correct the tool motion.
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3.
Click run to start the computation in RADIOSS.
For LS-DYNA:. An LS-DYNA input file named bwrap_form1_complete.bdf is generated. The file can be submitted to LS-DYNA for solver analysis.
Return to Incremental Tutorials
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HF-3030: Drawbead In this tutorial, you will learn: How to apply analytical drawbeads in a simple box forming process How to define tool motion About birth and death time concepts in tool motion definition How to define tool load
Tools The following panels are used in this tutorial and can be accessed from the Setup menu: Sections panel Materials panel Comps panel Tool Build panel Tool Motion panel Tool Loads panel Save panel Run panel HyperForm provides two methods by which to setup analytical drawbeads: The drawbead function, from the Setup menu of the Incremental_Radioss/Incremental_LsDyna user profiles. The Drawbeads Editor module, from the Setup menu of the Incremental_Radioss/ Incremental_LsDyna user profiles
Exercise: Using Analytical Drawbeads This exercise uses the model file drawbeads_Radioss.hf and drawbead_lines.igs for Radioss setup and drawbeads.hf and drawbeads_lines.igs for Dyna setup.
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Step 1: Load the file 1.
Click the icon and browse the directories to select the file \tutorials\mfs\hf\incremental\drawbeads_radioss.hf for Incremental_Radioss and \tutorials\mfs\hf\incremental\ drawbeads.hf file for Incremental_LsDyna.
2.
Click Open.
Step 2: Translate the binder 1.
Click Mesh > Translate > Components.
2.
Click on comps and select the Binder component.
3.
Set the direction switch to z-axis.
4.
Set the toggle to magnitude = and enter 6.0.
5.
Click translate +.
6.
Click return.
Note:
The binder is translated in the z-direction to account for the addition of analytical drawbeads of height 6.0 mm.
Step 3: Import the drawbead IGES line 1.
Click the Import icon
2.
Click the Import Geometry icon
3.
Click on the file browser icon and browse to the file \tutorials\mfs\hf\incremental\drawbead_lines.igs.
4.
Click Open to select the file, then click Import to import the file.
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to open the tabbed Import dialog. to set the Import Geometry options.
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5.
Click Close to close the Import dialog.
Step 4: Display only the die component and change the visualization to wire frame mode 1.
In the Model Browser, expand the Component folder.
2.
Click on the mesh icon as shown in the figure below to turn off the mesh display for all components except the blank mesh.
Display the binder and draw bead lines
3.
Click on the wireframe icon
to change the visualization to wire frame mode.
Step 5: Create analytical drawbeads 1.
Click Setup > Drawbeads.
2.
In the drawbead: field, type db1.
3.
Click comps and select the blank component as the master.
4.
Click line and select the line for DB1 as shown in the figure below.
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– For Incremental_Dyna only, click attached to and select binder.
5.
Click calculate to switch to the drawbead force calculator. Notice that Drawbead height and radius are automatically set to 6.25.
6.
Click shoulder radius and type 2.0.
7.
Ensure that Round is selected as the Drawbead type.
8.
Click calculate. Notice that restraint force and closure force are automatically calculated.
9.
Click back to accept calculated values.
10. Click color and select a color. 11. Click create to generate the drawbead. Notice a thick line drawn in selected color appears on the blank.
Step 6: Create additional drawbeads 1.
Click the field beside drawbead = and type db2.
2.
Click comps and select the blank component as the master.
3.
Click line and select the line for DB2 as shown in figure 1.
4.
Click color and select a color.
5.
Click create.
6.
Click the field beside drawbead = and enter the name db3.
7.
Click comps and select the blank component as the master.
8.
Click line and select the line for db3 as shown in the figure.
9.
Click color and select a color.
10. Click create.
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11. Click return. Note: For Radioss:
Three components are created for drawbeads with the names ^db_line for [user input name]. /INTER / TYPE 8/INTER ID Radioss cards are created and stored in those components.
For Dyna:
Three components are created for drawbeads with the names ^db_line for [user input name]. *Contact_Drawbead_Title DYNA cards are created and stored in those components
Step 7: Display all components and set the view to Isometric 1.
In the Model Browser, click on the mesh icon as shown in the figure below to turn off the blank mesh.
2.
From the tool bar, click the user view
3.
Click Iso1.
4.
In the Model Browser, right click on the Component folder and select Show.
icon.
Step 8: Define the binder tool motion 1.
From the Setup menu, click Tool Motion.
2.
Click moving tool and select the Binder component.
3.
Click max velocity and type –2000.
4.
Click total travel and type 6.0.
5.
Verify that all options (at right-hand side) are set to: translation velocity linear termination, load curve and loadcol are also checked.
6.
Click setup.
7.
Click the history subpanel. Notice that the calculated termination time is T = 0.005 seconds. This time will be used again later in the exercise.
8.
Click the motion subpanel.
9.
Click edit card.
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10. For Radioss, click Tstop field and type 0.005. For Dyna, click DEATH field and type 0.005. This stop/death time will ensure that the prescribed motion of the binder is stopped before a force load is applied. 11. Click return. Stay in the Tool Motion panel for the next step.
Step 9: Update the contact with binder tool motion 1.
In the Model Browser, expand the Groups folder.
2.
Right click on Binder_to_blank and select Card Edit.
3.
Scroll all the way to the bottom of the sections as shown in red box in the image below:
4.
Click the Number of Load Collectors toggle and select 2. This will add a second load collector selector as shown in the red box in the image below:
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5.
Click on the button loadcollector_ids(2) and select loadcol_IMP-binder.
6.
Click return.
Step 10: Define the punch tool motion 1.
Click moving tool and select the Punch component.
2.
Click starting time and type 0.005. This start time offset will ensure that the punch does not start moving until the binder is fully closed.
3.
Click update.
4.
Click the history subpanel. Note the termination time, T, is now calculated to be 2.090e-2 seconds. For Incremental_Dyna only, complete the following steps: – Click cycles/travel and type 100. – Click update.
5.
Click return.
Step 11: Update the contact with punch tool motion 1.
In the Model Browser, under, the Groups folder, right click on punch_to_blank and select Card Edit.
2.
Scroll all the way to the bottom of the sections.
3.
Click the Number of Load Collectors toggle and select 2.
4.
Click on the button loadcollector_ids(2) and select loadcol_IMP-punch.
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5.
Click return.
Step 12a: Define the binder load (Incremental_Radioss only) 1.
From the Setup menu, click Tool Load.
2.
Click tool = and select Binder.
3.
Click tool force and type –100000.
4.
Verify the direction is set to Z axis.
5.
Click setup.
6.
Click return.
Step 12b: Define the binder load (Incremental_LsDyna only) 1.
From the Setup menu, click Tool Load.
2.
Click tool = and select Binder.
3.
Click tool force and type –100000.
4.
Verify the direction is set to Z.
5.
Click max velocity and type 500.
6.
Click setup.
7.
Click edit beside the stoppers option checkbox.
8.
Click TB and enter 0.005. (s).
9.
Click return. This ensures the rigid body stopper becomes active as soon as the prescribed motion of the binder is killed.
10. Click update. 11. Click return.
Step 13: Update the contact with binder load 1.
In the Model Browser, under the Groups folder, right click on binder_to_blank and select Card Edit.
2.
Scroll all the way to the bottom of the sections.
3.
Click the Number of Load Collectors toggle and select 3.
4.
Click on the button loadcollector_ids(3) and select loadcol_CLOAD_binder.
5.
Click return.
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Step 14: Save the analysis setup as drawbead_complete.hf 1.
From the File menu, click Save As....
2.
Use the file browser to save the file as drawbead_Radioss_complete.hf for Radioss and drawbead_complete.hf for Dyna.
3.
Click Save.
Step 15: Review the animation and run the analysis For Incremental_Radioss: 1.
From the Setup menu, click Run Analysis.
2.
Click create sta file.
3.
Click animation
Note: 4.
Notice the kinematics of the tool motion. This animation feature enables you to review and correct the tool motion.
Click run to start computation in RADIOSS.
For Incremental_Dyna: 1.
From the Utility Menu, under Setup, click Run.
2.
Click create dynain.
3.
Click applied comps: comps and select blank.
4.
Click select.
5.
Select the DYNA check box.
6.
Click setup.
7.
Click return.
8.
Click animation. Notice the kinematics of the tool motion.
9.
Click dyna file and specify the name as drawbead_complete.
10. Click run. A dyna input as drawbead_complete.bdf is generated. The file can be submitted to LS-DYNA for solver analysis.
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HF-3040: Springback During forming process, elasto-plastic stress gradients across the surface builds up and results in an accumulation of residual stresses. The residual stresses cause the material to bounce back after forming. The resultant deviations from the profile often require manual adjustment before the component is considered acceptable for assembly. Components that do not fit in the final assembly usually need additional shimming and assembly time. In this tutorial, you will learn the setup procedure for performing a springback analysis for Radioss and LsDyna. The part shape and stress and strain states at the end of a simple draw forming operation are the inputs to setup. Appropriate material and section properties are assigned to the blank component. Fixture constraints are applied to the part to eliminate rigid body modes. In this tutorial, you will learn: How to load an .hf model, including an additional *.hmx file Section definition Material definition Setting up a springback analysis
Tools The following options are used in this tutorial and can be accessed from the Setup menu: Sections panel Materials panel Components panel Advanced panel (for Radioss) Sprbk Setup panel (for Dyna)
Exercise: Springback Exercise This exercise uses the following model files: springback_radioss.hf and sta_for_springback.hmx (for Radioss) springback.hf and dynain_for_springback.hmx(for Dyna)
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Step 1: Import the file and set the Include file The model files are zipped in the tutorial location. Before proceeding, unzip the files. 1.
Click on the open .hm file icon and browse to the file \tutorials\mfs\hf\incremental\springback_radioss. hf for Radioss or \tutorials\mfs\hf\incremental\springback.hf for Dyna.
2.
Click Open.
3.
From the View menu, select Eroded Mesh to enable a clear view with only the adapted elements displayed.
Note:
A file containing the forming results, _STA.hmx for Radioss and dynain.hmx for Dyna, must be included in the springback analysis.To set the Include file, first copy the file sta_for_springback.hmx from the installation directory \tutorials\mfs\hf\incremental to the current working directory, and then follow either of the two methods described below.
Method 1: 1.
In the Model Browser, under Master Model, right-click on the *.sta.hmx file and select Include File Options… The Include File Options dialog appears, showing the current path of the Include file. (The current path points towards the installation directory \tutorials\mfs\hf\Incremental)
2.
Browse for the new path and click Set. The new path is the location of the current working directory, where the *.sta.hmx file is saved.
Method 2: 1.
Edit the D00 file, after the complete setup, and insert the card - #include Here is sta_for_springback.hmx
Step 2: Create blank section properties
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1.
From the Setup menu, select Sections.
2.
Click section: and enter blank_section.
3.
Click thickness = and enter 1.0. (mm)
4.
Click card image= and select the respective card image from the list: For Radioss, select SH_ORTH as the card image For Dyna, select SectShll as the card image
5.
Click create.
6.
Click return.
Step 3: Create blank material properties 1.
From the Setup menu, select Materials.
2.
Click materials: and enter CRDQ_steel.
3.
Click card image: and select the respective card image from the list: For Radioss, select HillOrthotropicTabulated as the card image For LsDyna, select TransAnsioElasticPlastic as the card image.
4.
Click import curve.
5.
In the curve: field, enter stress_strain_curve.
6.
Click sigy = and enter 185. (MPa)
7.
Click k = and enter 550. (MPa)
8.
Click n = and enter 0.21.
9.
Click create.
10. Click back. 11. Click create. 12. Click return. Blank material properties are defined using Hill_Orthotropic Tabulated in Radioss and a transversely anisotropic elastic plastic material model in LsDyna. Material density, Poisson’s ratio, and Young’s modulus are assumed to be that of steel. A Holloman-type stress-strain curve is created and assigned to the material. Alternatively, an elastic material model could be used to model the blank since the stress recover during spring-back is essentially elastic.
Step 4: Assign section and material properties to the blank component
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1.
From the Setup menu, select Components.
2.
Click component: and select Blank.
3.
Click section: and select blank_section.
4.
Click material: and select CRDQ_steel.
5.
Check the adaptive checkbox.
6.
Select a color.
7.
Click update.
8.
Click return.
Step 5: Set a top view of the blank 1.
From the keyboard, click the letter v.
2.
Click top.
Step 6: Set up constraints 1.
Select Setup and select Advanced. Make sure you are in the springback subpanel. – For the Incremental_LsDyna user profile, from the Utility Menu, choose Sprbk and click Sprbk Setup . Ensure that the option using dynain is set.
2.
Click constraints: nodes and select node A as shown in the figure below.
3.
Check only the dof3.
4.
Click setup.
5.
Repeat the above procedures and create a total of three constraints as shown in image below.
6.
Press the P key to refresh the screen.
7.
Click return. Constraint nodes are chosen to eliminate rigid body modes. Artificial stabilization is used to gradually unload stress in the part.
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Step 7: Save the analysis setup 1.
Click on the File menu and select Save As….
2.
Save the file as springback_radioss_complete.hf for Radioss and springback_complete_hf for Dyna.
3.
Click save.
Step 8: Run the analysis 1.
From the Setup menu, select Run Analysis.
2.
Click create sta file.
3.
Click run to start the computation in Radioss. For Radioss, _0000.rad and _0001.rad files are created and the solver is launched. For Dyna, springback_complete.bdf is generated. The file can be submitted to LS-DYNA for solver analysis.
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HF-3050: Trimming This tutorial illustrates the setup procedure for performing a trimming operation. This example uses a simple box form. The part shape, stress, and strain state at the end of a simple draw forming operation are the inputs for this analysis. Appropriate material and section properties are assigned to the blank component. A trim line is imported from a file and the trimming operation is set up. Note:
It is possible to trim by selecting the elements and by components. Trimming by components option can trim only the elements inside the trim line.
Tools The following options used in this tutorial can be accessed from the Setup menu. For LsDyna, the Trim application needs to be selected. Sections panel Materials panel Components panel Advanced panel Run Analysis panel
Exercise: Trimming Analysis This exercise uses the model file radios_trimming_sta (for Radioss), dynain_trimming (for LsDyna), and trim_line.igs.
Step 1: Load the STA file The model files are zipped in the tutorial location. Before proceeding, unzip the files. 1.
Click the Import icon
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2.
Click the Import Solver Deck icon
3.
Set the File type field to RADIOSS (Block) and browse to the file \tutorials\mfs\hf\incremental\radioss_trimming.sta (for Radioss) and \tutorials\mfs\hf\incremental/ dynain_trimming (for Dyna).
4.
Click Open to select the file, and then click Import to import the file into HyperForm. Note:
.
When the STA/DYNAIN file imports, only the node and element definitions are read into HyperForm. The adaptive constraints, initial stress and initial strain quantities are automatically placed into a new file called Radioss_trimming.sta.hmx/dynain.hmx. This extra information is automatically included in the new setup by use of the *INCLUDE card for Radioss and *INCLUDE card for Dyna. The sta.hmx file and the dynain.hmx file will be created in the working directory. If, for some reason, you wish to change the path of the INCLUDE card, use the following steps. Ensure that the *sta.hmx/Dynain.hmx file is copied to the changed location. Method 1: 1.
Right-click on the *.sta.hmx/Dynain.hmx file in the Model Browser under Master Model and select Include File Options… A window will pop up showing the current path of the file.
2.
Browse for the new path and click Set. The new path is the location of the current working directory, where the *.sta.hmx/Dynain.hmx file is saved
Method 2: 1.
For Radioss, edit the D00 file after the complete setup, and insert the card #include . For Dyna open the BDF file and insert the card *INCLUDE redraw_dynain.hmx. Here is cup_draw_0001.sta.hmx/redraw_dynain.hmx
Warning: No renumbering or rotations of the imported STA component is allowed. The stress and strain tensors are written with respect to a global coordinate system and require a suitable transformation. Currently, HyperForm does not support transforming these stress and strain tensors. The STA file should be imported prior to importing other tooling models to prevent node or element renumbering by HyperForm.
Step 2: Rename the imported component 1.
In the Model Browser, expand the Component folder.
2.
Right-click on the component named 1 and select Rename.
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3.
Enter the name as blank.
Step 3: Create blank section properties 1.
Click Setup > Sections.
2.
In the section: field, type blank_section.
3.
In the thickness = field, type 1.0.
4.
Click card image= and select the respective card image from the list: For Radioss, select SH_ORTH as the card image. For LsDyna, select SectShll as the card image.
5.
Click create.
6.
Click return.
Step 4: Create blank material properties 1.
Click Setup > Materials.
2.
In the material: field, type CRDQ_steel.
3.
Click card image:, and select the respective card image from the list: For Radioss, select HillOrthotropicTabulated. For LsDyna, select TransAnsioElasticPlastic.
4.
Click import curve.
5.
In the curve: field, type stress_strain_curve.
6.
In the sigy = field, type 185. (MPa)
7.
In the k = field, type 550. (MPa)
8.
In the n = field, type 0.21.
9.
Click create.
10. Click back. 11. Click create. 12. Click return.
Step 5: Assign section and material properties for the blank component 1.
Click Setup > Components.
2.
Double-click component: and select blank.
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3.
Click section: and select blank_section.
4.
Click material: and select CRDQ_steel.
5.
Select a color.
6.
Click update.
7.
Click return.
Step 6: Import the IGES file 1.
Click the Import icon
2.
Click the Import Geometry icon
3.
Click on the file browser icon
4.
Click Open and then click Import.
5.
Click Close to close the Import dialog.
to open the tabbed Import dialog. to switch to Import Geometry options. and browse to the file trim_line.igs.
Step 7: Activate geometry handles for easier graphics area line selection 1.
Click Preferences > Geometry Options.
2.
Select the graphics subpanel, and check the geom handle option. Notice the geometry handles appear on top of all lines.
3.
Click return.
Step 8: Combine trim curve lines in a clockwise fashion 1.
Click Geometry > Edit > Lines > Combine Line. – For LsDyna, under Setup, click Combine Line.
2.
Click 1st lines and select the 1st line as shown in the image.
3.
Click 2nd line and select the 2nd line as shown in the image. Notice two selected lines will be combined into a new line.
4.
Repeat this selection process in a clockwise direction using the new line and the next adjacent line until all lines have been combined into a single line.
5.
Click return to close the panel.
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Step 9: Set up a trimming operation For Incremental_Radioss: 1.
From the Setup menu, click Advanced and choose the trimming subpanel.
2.
Click trim part: comps and select the blank component.
3.
Click trim line: line and select the line.
4.
Click the direction selector and select z-axis.
5.
Click toggle to switch to remove element inside.
6.
Click trim. Note: Trimming inside Radioss is done in the pre-processor.
7.
After the trimming calculation is done, from the View menu, click Trimmed Mesh. This will switch on the trimmed mesh.
For Incremental_Dyna: 1.
Click Trimming Setup under Trim application type.
2.
Click applied comps: comps and select blank component.
3.
Click trim lines: line list and select the line.
4.
Click the direction selector and select z-axis.
5.
Click the toggle to switch to remove element inside.
6.
Click setup.
7.
Click return.
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Step 10: Save the analysis setup as trimming_complete.hf 1.
From the File menu, click Save As....
2.
Save the file as trimming_complete.hf,
3.
Click save.
Step 11: Run the analysis (Dyna profile only) 1.
Under Setup, click Run.
2.
Click create dynain.
3.
Click applied comps: comps and select blank.
4.
Click select.
5.
Select the DYNA check box.
6.
Click setup.
7.
Click return.
8.
Click dyna file and specify the name trimming_complete
9.
Click run. A dyna input file trimming_complete.bdf is generated. The file can be submitted to LSDYNA for solver analysis.
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HF-3060: Gravity This tutorial illustrates the setup procedure for performing a gravity analysis. A setup file containing the blank and die mesh provides the starting point. The Auto Process utility is used to position the blank with reference to the die, and assign the appropriate material and section properties to the tool and blank.
Tools This tutorial uses the Gravity process available under the Auto Process utility:
Exercise: Gravity Analysis This exercise uses the model file gravity.hf.
Step 1: Load the HyperForm setup file 1.
Click on the open .hm file icon and browse to the file / tutorials/mfs/hf/incremental/gravity.hf.
2.
Click Open.
Step 2: Set up a Gravity process using Auto Process 1.
Click on the Gravity icon
2.
Under the component column, ensure that blank is selected for row Blank1 and tool_source is selected for the Tooling row.
. This opens the Auto process utility with the gravity template loaded in it.
The primary purpose of simulating gravity is to compute the shape of the deformed sheet due to a gravity load. This can help to reduce the simulated tool travel distance, and eliminates some of the low frequency dynamic oscillation that occurs when the tools first contact the blank. – Select the implicit option (LsDyna user profile only).
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3.
Click Autoposition. This automatically positions the blank with reference to the tool without user intervention. Avoiding initial penetration/intersections would be considered while autopositioning.
4.
Click Apply.
5.
Click Run. Specify the file name of the input deck as gravity_complete. _0000.rad and _0001.rad files are written and automatically launches the RADIOSS solver. Radioss: _0000.rad and _0001.rad files are written and automatically launches the RADIOSS solver. Dyna: Writes a .bdf file. This file can later be submitted into LS-DYNA.
Note:
Radioss writes a STA file and Dyna writes a dynain file, which can be used as include files for subsequent analysis.
Step 3: Save the analysis setup as gravity_complete.hf 1.
Click File and click Save As...
2.
Enter the file name as gravity_complete.hf.
3.
Click Save.
4.
Click return.
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HF-3070: Redraw This exercise illustrates a second stage setup procedure of a forming analysis. A setup file containing the tool meshes provides the starting point. The blank shape at the end of the binderwrap and draw forming exercise is used in this analysis. Appropriate material and section properties are assigned to each component. This tutorial assumes that you are familiar with functionalities such as creating components, geometry cleanup, and meshing. Information about these topics can be found in the online help.
Tools The following options used in this tutorial can be accessed from the Setup menu: Import STA/Dynain Rename Sections Materials Tool Motion Tool Load
Exercise: Perform a redraw forming analysis This exercise uses the model files redraw_radioss.hf and cup_draw_001.sta for Radioss setup, and redraw_hf and redraw_dynain for Dyna setup.
Step 1: Load the STA/DYNAIN file 1.
Click the Import icon
2.
Click the Import Solver Deck icon
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to open the tabbed Import dialog. and make sure the File type field is set to Radioss (Block).
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3.
Click on the file browser icon to open the dialog. Change the Files of type option to all files and browse to the file \tutorials\mfs\hf\incremental\ cup_draw_0001.sta for RADIOSS BLOCK and redraw_dynain for DYNA KEY.
4.
Click Open to select the file, and then click Import to import the file into HyperForm. The Import Process Messages dialog appears. You can choose to show the .hmx file, save the file with a different name, delete the message file, or simply close the dialog. Click Close to close the dialog. Note:
When the STA/DYNAIN file imports, only the node and element definitions are read into HyperForm. The adaptive constraints, initial stress and initial strain quantities are automatically placed into a new file called sta.hmx/dynain.hmx. This extra information is automatically included in the new setup by use of the *INCLUDE card for Radioss and *INCLUDE card for Dyna. The sta.hmx file and the dynain.hmx file will be created in the working directory.
Warning: No renumbering or rotations of the imported dynain component is allowed. The STA/DYNAIN file should be imported prior to import other tooling models to prevent node or element renumbering by HyperForm. If, for some reason, you wish to change the path of the INCLUDE card, use the following steps. Ensure that the *sta.hmx/Dynain.hmx file is copied to the changed location.
Method 1: 1.
Right-click on the *.sta.hmx/Dynain.hmx file in the Model Browser under Master Model and select Include File Options… A window will pop up showing the current path of the file.
2.
Browse for the new path and click Set. The new path is the location of the current working directory, where the *.sta.hmx/Dynain.hmx file is saved
Method 2: 1.
For Radioss, edit the D00 file after the complete setup, and insert the card #include . For Dyna open the BDF file and insert the card *INCLUDE redraw_dynain.hmx. Here is cup_draw_0001.sta.hmx/redraw_dynain.hmx.
Warning: No renumbering or rotations of the imported STA component is allowed. The stress and strain tensors are written with respect to a global coordinate system and require a suitable transformation. Currently, HyperForm does not support transforming these stress and strain tensors. The STA file should be imported prior to importing other tooling models to prevent node or element renumbering by HyperForm.
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Step 2: Import the file 1.
In the Import dialog, click on the Import HM Model icon
2.
Click on the file browser icon . Change the Files of type option to all files and browse to the file redraw_radioss.hf for the Radioss setup and redraw.hf for the Dyna setup.
3.
Click Open to select the file, and then click Import to import the file into HyperForm.
4.
Click Close to close the Import dialog.
Note:
Importing a HyperForm file allows this model to be added on to the previously-loaded STA/DYNAIN model without numbering any existing IDs in the HyperForm database.
Step 3: Rename the STA/DYNAIN component 1.
In the Model Browser, expand the Component folder.
2.
Right-click on the component 1 and select Rename.
3.
Enter the new name as blank.
Step 4: Create blank section properties 1.
From the Setup menu, click Sections. The Section definition panel is displayed.
2.
In the section: field, enter blank_section.
3.
In the thickness: field, enter 1.0 (mm).
4.
Click card image: and select For Radioss, select P9_SH_ORTH For Dyna, select Sectshll
5.
Click create.
6.
Click return.
Step 5: Create blank material properties 1.
From the Setup menu, click Materials. The Material definition panel displays.
2.
In the material: field, enter CRDQ_steel.
3.
Click card image and select the respective card image from the list: For Dyna, select TransAnisoElasticPlastic
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For Radioss, select HillOrthotropic Tabulated 4.
Click import curve.
5.
In the curve: field, enter stress_strain_curve.
6.
In the sigy = field, enter 185 (MPa).
7.
In the k = field, enter 550 (MPa).
8.
In the n = field, enter 0.21.
9.
Click create.
10. Click back. 11. Click create. 12. Click on add to database. A folder browser is displayed, allowing you to browse for a folder into which the newly created material file will be saved. This will be a one time operation for every new material created, after which you can access the material using the Material Database option in the Setup menu.
13. Click OK to close the folder browser. 14. Click return to exit out of the Materials panel.
Step 6: Assign section and material properties to the blank component 1.
From the Setup menu, click Components.
2.
Click component: and select blank.
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3.
Click section: and select blank_section.
4.
Click material: and select CRDQ_steel.
5.
Select the adaptive check box.
6.
Click update.
7.
Click return.
Step 7: Autoposition the blank onto tools 1.
From the Tools menu, click Auto Position.
2.
Select the autoposition subpanel.
3.
Select the multipart radio button.
4.
Click punch: comps twice and select the Punch component.
5.
Click binder: comps twice and select the Binder component.
6.
Click die: comps twice and select the Die component.
7.
Click blank: comps twice and select the Blank component.
8.
Click the moving part toggle to die. Note: This tutorial contains a single action draw problem. In single action draw, the punch remains stationary and the die closes in the –z direction. Therefore, the moving tool is set to the die and the direction is set to Z axis -.
9.
Click adjust. This operation takes few seconds depending on the complexity of the setup.
10. Click return.
Tools and blank after autopositioning
Step 8: Define the tool motion 1.
From the Setup menu, click Tool Motion. The Tool Motion panel is displayed.
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2.
Click moving tool and select the die component.
3.
Click max velocity and enter –5000 (mm/s).
4.
Click total travel and enter 38.0 (mm).
5.
Click set up. Note:
After auto-position, the distance between die and punch is about 36.0 mm. Final distance between punch and die = = 39.2 – approximate blank thickness * 1.2 = 39.2 – (1.0 * 1.2) = 38.0 mm. The blank section property defined in step 4 will be overwritten by the actual thickness carried from previous forming result within the STA/DYNAIN file. The STA/DYNAIN file contains nodal thickness results.
6.
Click return.
Step 9: Define the binder load 1.
From the Setup menu, select Tool Load.
2.
Click tool = and select Binder.
3.
Click tool force and enter 200000. (N)
4.
For Incremental_Dyna only: Click max velocity and enter 5500 (mm/s). keep all the other default options.
5. Click set up. You apply a force of 200kN to the binder. A rigid body stopper limits the maximum velocity of the binder in order to minimize inertial effects. The maximum velocity is 10% greater than the punch velocity, allowing the blankholder to adjust for thickening or wrinkling of the blank. 6.
Click return.
Step 10: Setup contacts between the blank and the tools 1.
From the Setup menu, click on Contacts.
2.
Click on the multiple subpanel.
3.
Next to master: field, click on comps and select Binder, Die and Punch.
4.
Next to slave: field, click on comps twice and select Blank.
5.
Click create.
6.
Click return.
Step 11: Modify the adaptivity settings These steps should be followed for Dyna only:
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1.
From the main menu area, click control cards.
2.
Click the Adaptive control card.
3.
Click ADPSIZE and enter 11.2 (mm).
4.
Click return.
5.
Click return. ADPSIZE defines the minimum element size to be adapted. To maintain the adaptive levels in the blank, this parameter should be set to an element size which is slightly less than twice the size of the smallest element in your adapted blank (ADPSIZE = 1.95*smallest characteristic length). During each adaptive cycle, LS-DYNA checks to see if any elements have a characteristic length greater than ADPSIZE, if so, then those elements can potentially adapt. Conversely, the elements smaller than ADPSIZE are not allowed to adapt. For this example, the smallest characteristic length in the blank after 3 levels is ADPSIZE = 5.76*1.95 = 11.2 mm.
5.76 mm so the
Step 12: Update the contact with die motion 1.
In the Model Browser, expand the Group folder.
2.
Right click on Die_to_blank and select Card Edit.
3.
Scroll to the bottom of the sections as shown in red box in the image below:
4.
Click on the Number of Load Collectors toggle and select 2. This will add a second load collector selector as shown in the red box in the image below:
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5.
Click on the button loadcollector_ids(2) and select loadcol_IMP-die.
6.
Click return.
Step 13: Update the contact with binder load 1.
In the Model Browser, right click on Binder_to_blank and select Card Edit.
2.
Scroll all the way to the bottom of the sections.
3.
Click the Number of Load Collectors toggle and select 2.
4.
Click on the button loadcollector_ids(2) and select loadcol_CLOAD-binder.
5.
Click return.
Step 14: Save the analysis 1.
From the File menu, click Save As....
2.
Save the file as redraw_radioss_complete.hf or redraw_complete.hf
3.
Click save.
Step 15: Run the analysis For Incremental_Radioss: 1.
From the Setup menu, select Run Analysis.
2.
Click animation. Note: Notice the kinematics of the tool motion. This animation feature enables you to review and correct
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the tool motion. 3.
Click run to start the computation in RADIOSS.
For Incremental_Dyna: 1.
From the Utility Menu, under Setup, click the Run button. This brings up the incremental analysis panel.
2.
Make sure that the path to the LS-DYNA executable is set. To do this, edit the lsdyna.bat file in the /hm/scripts/hyperform/automation/ directory.
3.
Click return.
4.
Click run.
Return to Incremental Tutorials
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HF-3080: Multi-stage Manager In this tutorial, you will learn about the Multiple Stage Manager. The Multiple Stage Manager provides a convenient graphical setup for modeling forming processes that are composed of multiple stages. It provides a dialog to assemble multi-stage processes by clicking icons that correspond to each step. The Multiple Stage Manager supports several types of forming process stages in incremental analysis such as gravity, forming, drawing and trimming. It can calculate many of the input values required for an incremental forming run while still allowing overrides for user-defined data. Complete the tutorial HF-3001: Auto Process prior to beginning this tutorial. This tutorial assumes that you are familiar with basic functionality such as geometry cleanup, meshing, and mesh editing. If you need help on these topics, please refer to the corresponding tutorials in the on-line help.
Tools The Multi-stage Manager is available in the Tools menu, under Multiple Stage Manager when the Incremental_Radioss or Incremental_Dyna user profile is loaded.
Exercise: Use Multiple Stage Manager to set up multiple forming analysis stages In this exercise, you will set up a multiple-stage forming analysis using gravity, double-action draw and trimming operations. This exercise uses the following model files: For Radioss: multistage_gravity_radioss.hf multistage_double_action_draw_radioss.hf multistage_trim_line.hf. For Dyna: multistage_gravity.hf multistage_double_action_draw.hf multistage_trim_line.hf.
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Step 1: Load the file 1.
Click on and browse the directories to find the file \tutorials\mfs\hf\incremental\multistage_gravity_ra dioss.hf.
2.
Click Open.
Step 2: Review the Multiple Stage Manager interface 1.
From the Tools menu, select Multi Stage Manager The Multi Stage Manager dialog opens, as shown below.
Project name: The user-defined name of the project. Location: A working directory for all the associated model files. Stages: A variety of forming analysis types is available. To apply a forming stage, select a stage by double-clicking its icon and that stage is appended to the sequence list on the right side of the dialog (current active forming sequence in the image). Sequence: The selected forming sequence that will be simulated. You can right-click an active forming sequence and select delete to remove the process from the active sequence window. Process build/setup tool: From the Process menu, click Setup to access the parameters for the
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currently-selected process stage. Two tabs, Setup and Details, appear in the left side of the dialog on which you can specify all the details of the analysis and review the settings. File: Create, open and save a new project. You can simulate complex, multi-stage processes in the Multi Stage Manager by following four simple steps listed below: Select process stages to add them to the process sequence Specify a source file for each stage Specify setup parameters for each stage Run the process
Step 3: Build the forming sequence 1.
For the Project name field, input New_process (default).
2.
Click on the … button next to the Location field, and browse for a target location folder to save the process file and model file.
3.
Under Stages, double-click the picture with the name Gravity.
4.
Notice the Gravity icon appears under Sequence. This indicates a gravity forming analysis is the first incremental forming analysis in the entire project.
5.
Click on the Gravity icon. Notice a red line is surrounding the icon indicating that the gravity sequence is currently selected.
6.
Click on … in front of the Source file field and browse to locate the file \tutorials\mfs\hf\incremental\multistage_gravity_ra dioss.hf for Radioss and \tutorials\mfs\hf\incremental\multistage_gravity. hf for Dyna.
7.
Click Open. The selected .hf file is assigned to the gravity process as a source file.
8.
Double-click Double Action Draw. Notice the Double Action Draw icon appears under the Sequence list.
9.
Repeat steps 5 and 6 to assign multistage_double_action_draw_radioss.hf for Radioss and multistage_double_action_draw.hf for Dyna to the Double Action Draw.
10. Repeat the above steps to make Trim active in the Sequence list and assign the multistage_trim_line.hf file.
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Step 4: Set up the Gravity process 1.
Under Sequence, click the Gravity icon.
2.
Click on the Process tab at the top of the window and select Setup. This brings up the process setup for gravity analysis.
3.
For Symmetry/Constraints:, select No.
4.
For Draw direction:, select –z. – For Dyna, select Implicit as the Gravity option.
5.
Under the Name column, click on the space left to Blank1. Notice an arrow (
6.
With blank1 selected, under the Source column select HF.
7.
With blank1 selected, under the Component column, verify Blank is selected.
8.
With blank1 selected, under Material, click the open folder icon Materials window.
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) appears.
and select CRDQ steel from the
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Radioss material database
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Dyna material database
9.
Click Select to accept the material.
10. With blank1 selected, under Thickness column, enter 1.0. 11. Click on the space left to Tooling. Notice an arrow (
) appears next to Tooling.
12. With Tooling selected, verify HF under Source and select Die under Component. Notice the pink die component color is shown as a solid line in the Multiple Stage Manager image.
Step 5: Set up the double action draw process
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1.
Under Sequence, click the Double Action Draw icon. Notice that the source file for Double Action Draw displays in the graphics area.
2.
For Draw beads, select No.
3.
For Symmetry/Constraints select No.
4.
For Draw direction, select –z.
5.
For Motion type, select Velocity.
6.
For Blank1, verify the name under Source is set to State file. Note:
At the end of the first stage gravity analysis, a STA file for Radioss and a Dynain file for Dyna is generated and imported into second stage double action draw forming as the initial blank. This file contains the shape of the blank in additional to the stress and strain output after the gravity stage.
7.
Verify that the remaining Source column values are set to HF.
8.
For Die, Punch and Binder names, verify Component column is set to Die, Punch and Binder respectively.
9.
For Punch, click on Clearance and enter 0.0. The meaning of different motion controls for the tools is enumerated below Clearance: This is the value for the distance between the punch and the blank at the initial stage. When clearance value is assigned, the Travel1 and Travel2 values will be adjusted accordingly. Travel 1: The distance the punch travels towards the blank until the binder is closed. Velocity 1: The velocity at which the punch travels towards the blank. The suggested velocity is 2000 mm/s Travel 2: The distance the punch travels towards the die after Travel 1 until the end of the draw. Velocity 2: The velocity at which the punch travels for Travel 2. The suggested velocity is 10000 mm/s Note:
Travel1 + Travel2 distance is the total travel of the punch. If you wish to specify values for Travel 1 and Travel 2, you need to turn off autopositioning in the settings.dat file.
10. Click on Binder and change the Type to Gap. Enter the values as shown below: Gap: 0.0 (default) The meaning of different motion controls for the tools is enumerated below Travel: type a value for the distance the binder travels toward the die. Velocity: type a value for the velocity at which the binder travels toward the die. The suggested velocity is 2000 mm/s. Type: select Gap or Force for the binder. If you choose Force, type a value (in Newtons) in the Force column that appears to the right. If you choose Gap, type a value in the Gap column that appears to the right. Gap is defined as the actual physical distance between the binder and die that is maintained after the binder closure until the draw is completed, minus the blank thickness + 20% of blank thickness. Note:
When gap value is specified, travel distance is automatically calculated and assigned. If you wish
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to specify values for Travel, you need to turn off autopositioning in the settings.dat file.
Step 6: Set up the trimming process 1.
Under Sequence, click on Trim.
2.
Under the Name column, click on the space left to Trim. Notice an arrow (
3.
With Trim selected, under Component column, select line.
4.
With Trim selected, under Remove column, verify Outside is selected.
) appears.
Step 7: Save the process and run the analysis For Incremental_Radioss: 1.
Within the Multiple Stage Manager, from the Files menu, select Save Process. Notice a message appears at the bottom of the Multiple Stage Manager window showing the path of the saved process file.
2.
From the Process pull-down menu, select Run. The Radioss solver is launched.
For Incremental_Dyna: To make the solver launch automatically as outlined about for Radioss, complete the following. HyperForm incremental forming analysis uses LS-DYNA as the solver. In order for HyperForm to launch the solver directly, you must specify the solver environment by performing the following steps: 1.
Open \hm\scripts\hyperform\automation\lsdyna.bat using any text editor.
2.
Remove any lines above "REM Remove the lines above and point the line below to lsdyna-executable".
3.
Point to the full path and LS-DYNA executable. Example: C:\LSDYNA\program\ls970_s_5434a_win32.exe i=%1
4.
Save and overwrite the lsdyna.bat file.
Step 8: (optional): Review result files 1.
Upon completion of the Radioss/Dyna run, review the result files in the following directories. stage_1: contains the input deck and result files for Gravity run stage_2: contains the input deck and result files for Double draw action run Stage_3: contains the input deck and result files for Trim run. Note: The input deck is the _0000.rad and _0001.rad files. The input deck for Dyna is the key file.
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2.
Review the Animation files within each folder using HyperView.
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HF-3090: Tube Bending In this tutorial, you will learn the tube bending setup procedure using a simple tube bending process. This tutorial assumes that you are familiar with basic bending process parameters.
Tools This utility can be accessed from the Tools menu under the Bend option, as shown below:
The following panels used in this tutorial can be accessed from the Setup menu: Materials panel Components panel Run analysis panel
Exercise: Basic Tube Bending Analysis This exercise creates the model file and sets up a tube bending simulation from scratch. Standard tooling geometries can be created from HyperForm and no preliminary file needs to be loaded to perform this tutorial.
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Step 1: Create the tube bending model 1.
From the Tools menu, select Bend and then select Model Creator. The following panel is displayed.
2.
Enter the values shown in the fields below:
Field Description
Values Tooling Parameters
Form Tool Center – X
0.0
Form Tool Center – Y
0.0
Form Tool Center – Z
0.0
Bend Die Radius (mm)
163
Offset From Center (mm)
100 Ball Parameters
Number of Balls
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Ball Outer Dia (mm)
70.3 Tube Parameters
3.
Outer Dia (mm)
76.2
Tube Length (mm)
750
Wall Thickness (mm)
2.6
Length Before First Bend (mm)
156.6
Click Apply. The graphical definition of all parameters is illustrated in the image below.
Note : Outer Dia = Tube diameter ( at mid surface of a tube) + Wall Thickness.
Step 2: Create the tube material properties 1.
From the Setup menu, select Materials.
2.
In the material: field, type CRDQ_steel.
3.
Click card image:, and select the respective card image from the list. Note:
For Radioss, select HillOrthotropic Tabulated as the card image For Dyna, select TransAnsioElasticPlastic as the card image
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4.
Click import curve.
5.
In the curve: field, type stress_strain_curve.
6.
In the sigy = field, enter 185. (MPa)
7.
In the k = field, enter 550. (MPa)
8.
In the n = field, enter 0.21.
9.
Click create.
10. Click back. 11. Click create. 12. Click return.
Step 3: Assign material properties for the tube component 1.
From the Setup menu, select Components.
2.
Double-click component: and select Tube. Note that the section: field is already updated with Tube.
3.
Click material: and select CRDQ_steel.
4.
Verify that the adaptive check box is not selected.
5.
Click update.
6.
Click return.
Step 4: Set up the bending simulation For the Incremental_Radioss User Profile: 1.
From the Tools menu, select Bend and then select Bend Setup. Type the file name as tube_bending and specify the required location to save the file.
2.
After saving, the bend setup utility appears:
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Notice that some component selections are already done. 3.
Set the Number of Bends field to 3 to specify the number of bends.
4.
Enter the following in the table to provide the bend sequence data:
5.
Translate
Rotate
Bend Angle
156.2
0
56.2
87.2
-49.2
50.2
99.7
126.1
29.8
Click Run. The folder where you saved the file will have _0000.rad and _0001.rad installed. The number of _000* files depends on the number of bends in the Bending setup. In this case, it is 6 files – 0001.rad, 0002.rad, 0003.rad, 0004.rad, 0005.rad and 0006.rad files. The tube bending problem has been set up completely. Note:
All tool parameters from the Bending Model Creator dialog are automatically applied to the "Bending Setup". However, if you create the tube and tool meshes without using the Bending Model Creator dialog, you will need to manually modify [install_directory] \scripts\hyperform\hydroforming\TubeBendingInitDefaults.dat to suit your needs.
For Incremental_Dyna user profile: 1.
Under Setup, click Bending Setup. The following dialog appears:
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2.
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Make the following component selections in the Hydro Tube Bending dialog by using the selector for the corresponding fields.
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3.
4.
Selector label
Component to Select
Form die:
FormDie
Mandrel:
Mandrel
Wiper die:
WiperDie
Pressure die:
PressureDie
Tube:
Tube
Tube rigid control:
CntrlRigid
Number of forming balls
2
Ball number 1:
ball_1
Ball number 2:
ball_2
Number of bends
3
Enter the following in the table for bend sequence data:
Translate
Rotate
Bend Angle
156.2
0
56.2
87.2
-49.2
50.2
99.7
126.1
29.8
Click Run. The tube bending problem has been set up completely. Note:
All tool parameters from the Bending Model Creator dialog are automatically applied to the "Bending Setup". However, if you create the tube and tool meshes without using the Bending Model Creator dialog, you will need to manually modify [install_directory] \scripts\hyperform\hydroforming\TubeBendingInitDefaults.dat to suit your needs.
Step 5: Save the analysis setup as tube_bending_complete.hf 1.
From the File menu, select Save As….
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2.
Use the file browser to save the file as tube_bending_complete.hf.
3.
Click save.
Step 6: Run the analysis 1.
Run the analysis from the Radioss Manager. The Radioss Manager can be accessed from Start - All Programs - Altair HyperWorks 11.0. Note: Do not use the Run function from the Utility Menu or the main panel area. This will rewrite the D00 and D0* files created from the Bending setup.
2.
Click run. An LS-DYNA input file named forming_complete.bdf is generated. The file can be submitted to LS-DYNA for solver analysis (in the Incremental_LsDyna user profile).
Return to Incremental Tutorials
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HF-3100: HydroForming Hydroforming is a metal forming process that involves using fluid pressure to shape the metal piece. It begins with the metal piece to be formed being placed in a blank holder over the punch. The blank holder and punch are then moved next to the fluid filled dome. Pressure inside the dome is increased to form the part. As the punch moves against the diaphragm of the dome, the pressure inside the dome is adjusted to form the part to the desired shape. In this tutorial, you will learn how to set up of a tube hydroforming process. This tutorial assumes that you are familiar with basic HyperForm functionality such as meshing and mesh editing. If you need help on these topics, refer to the corresponding tutorials in the online help.
Tools This tutorial uses the following panels which are available in Setup menu: Sections panel Materials panel Components panel Run Analysis panel
Exercise: Basic Tube Hydroforming Analysis This exercise uses the following model files: For Incremental_Radioss: tube_radioss.sta hydro_die_geom_radioss.igs For Incremental_Dyna: tube_dynain hydro_die_geom.igs
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Radioss Setup model
Dyna Setup model
Step 1: Import a STATE/DYNAIN file The model files are zipped in the tutorial location. Before proceeding, unzip the files. 1.
Copy the file tube_radioss.sta from it's location in the installation directory at \tutorials\mfs\hf\incremental to the location where you intend to run this simulation after setup.
2.
Click the Import icon . The Import tab opens with the options as shown below. Make sure that the selection is per the figure:
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3.
Click the file browser icon
4.
Click Open...
5.
Click Import.
Note:
and browse to find the file tube_radioss.sta or tube_dynain.
During import of the sta/dynain file, only the node and element definitions are read into HyperForm. The adaptive constraints, initial stress, and initial strain quantities are automatically placed into a new file called filename.sta.hmx/dynain.hmx. This extra information should be automatically included in the new setup by use of the #INCLUDE in the D00 0000.rad file for Radioss and *INCLUDE card for Dyna.
Step 2: Rename the STA/DYNAIN component 1.
In the Model Browser, expand the Component folder.
2.
Right-click on the component 1 and select Rename.
3.
Enter the new name as Tube and click Enter.
Step 3: Create blank section properties 1.
From the Setup menu, click Sections. The Section Definition panel is displayed.
2.
In the section: field, type tube_section.
3.
In the thickness: field, type 1.3(mm).
4.
Click card image: and select the respective card image from the list: For Radioss, select SH_ORTH For Dyna, select SectShll
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5.
Click create.
6.
Click return.
Step 4: Create tube material properties 1.
From the Setup menu, click Materials. The Material definition panel displays.
2.
In the material: field, type CRDQ_steel.
3.
Click card image:, and select the respective card image from the list: For Radioss, select HillOrthotropic Tabulated For Dyna, select TransAnsioElasticPlastic
4.
Click import curve.
5.
In the curve: field, type stress_strain_curve.
6.
In the sigy = field, enter 185. (MPa)
7.
In the k = field, enter 550. (MPa)
8.
In the n = field, enter 0.21.
9.
Click create.
10. Click back. 11. Click create. – For Dyna, click edit card and set Lankford coefficient (R) to 1.6. 12. Click return.
Step 5: Assign section and material properties for the tube component 1.
From the Setup menu, click Components.
2.
Double-click component: and select Tube.
3.
Click section: and select tube_section.
4.
Click material: and select CRDQ_steel.
5.
Select a color.
6.
Select the adaptive check box.
7.
Click update.
8.
Click return.
Note:
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By default, three levels of adaptivity are enabled. The adaptive levels can be changed by using the
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Control Card panel, and editing the parameter LevelMax in the card /ADMESH/GLOBAL for Radioss and the parameter MAXLVL in the Adaptive card for Dyna. Refer to the RADIOSS/LSDYNA manual for more detailed information.
Step 6: Import the die geometry 1.
Click the Import icon
2.
Click on the Import Geometry icon
3.
Click the file browser icon and browse to find the file hydro_die_geom_radioss.igs/ hydro_die_geom.igs and double click to open the file.
4.
Click Import.
5.
Click Close.
. The Import tab opens. to change to geometry import options.
Step 7: Rename the upper and lower die components 1.
In the Model Browser, expand the Component folder.
2.
Right-click on the component lvl3 and select Rename.
3.
Enter the new name as upper_die and click Enter.
4.
Right-click on the component lvl4 and select Rename.
5.
Enter the new name as lower_die and click Enter.
Step 8: Display only the upper and lower die components 1.
In the Model Browser, click the surface icon as shown in the figure below to turn on lower_die and upper_die components.
Step 9: Set the current component to Upper_Die 1.
In the Model Browser, under the Components folder, right click on Upper Die and select Make Current as shown below.
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Note: This sets the current working component to be upper_die.
Step 10: Mesh the Upper_Die component using R-mesh R-Mesh is a tool meshing utility available from the Mesh menu that allows you to specify several parameters to create the mesh. The macro is intended for generating rigid tool meshes for incremental analysis. For incremental analysis, the meshing parameters default settings are Minimum Edge: 0.5, Maximum edge: 30.0, Chordal deviation: 0.1, and Fillet angle: 15.0. The four parameters are defined as shown in the interface as shown below.
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1.
From the Mesh menu, click R-Mesh. The default parameters can be used here.
2.
Select the Mesh to current component check box.
3.
Click Mesh…
4.
Select the yellow surfs button and select by collector.
5.
Select the upper_die component and click proceed.
6.
Click Close.
Step 11: Repeat Steps 9 and 10 using lower_die as the current component 1.
Set the lower_die component as the default working component.
2.
Mesh the lower_die surface using R-Mesh.
Step 12: Set up pressure loads using the Hydro Setup macro 1.
Click Tools > Hydro > Hydro Setup.
For Incremental_Radioss: 2.
A window pops up asking you to save the file. Type the file name as tube_hydro_radioss_complete and specify the required location to save this file.. The HydroForming utility displays as below
3.
For Upper Die:, choose the upper_die component.
4.
Click Velocity: and type -2000. (mm/s)
5.
Click Total travel: and type 8. (mm)
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6.
For Lower Die:, select the lower_die component.
7.
For Tube:, select the Tube component.
8.
For Adaptive levels:, change from the default of 3 to 1.
9.
Click Coeff of friction: and type 0.125.
10. Click Initial pressure: and type 1000. (psi) 11. Click Final pressure: and type 6000. (psi) 12. Click Run to set up the hydroforming pressure loads. Notice the pressure curve and velocity curve are set on screen. Note:
For Radioss, D00 and D01 files are created at this step. Save the file as in Step 13 and directly use the Radioss Manager to run these files. The Radioss Manager can be accessed from Start - All Programs - Altair HyperWorks 11.0. Do not execute the Run command either from the Utility Menu or the main panel area.
Step 13: Save the analysis setup 1.
Click File > Save As....
2.
Enter the file name as tube_hydro_complete.hf.
3.
Click Save.
Step 14: (Incremental_Dyna Only) Review the animation and run the analysis 1.
Under Setup, click Run.
2.
Click create dynain.
3.
Click applied comps: comps and select Tube.
4.
Click select.
5.
Select the DYNA check box.
6.
Click setup. A message appears stating: "The entity set has been created." Note
At the end of the computation, LS-DYNA will write out a file named "dynain". This file contains all the stress and strain information necessary to perform subsequent operations. This file can be read directly by HyperForm and is essential for performing multi-stage setups.
7.
Click return.
8.
Click dyna file and specify the name tube_hydro_complete.
9.
Click run. A dyna input file tube_hydro_complete.bdf is generated. The file can be submitted to LS-DYNA for solver analysis.
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HF-3110: Blank Optimizer In order to precisely capture the final part profile after performing an incremental forming analysis, the deviation between the final part edge from the analysis and the targeted part edge is measured and applied to original blank profile. A new blank shape is then generated based on the applied deviation. Material is removed or added in areas corresponding to deviations of the part edge with respect to the target edge. This process is called blank optimization and will be studied in this tutorial.
Tools This tutorial uses functionality available in the Tools menu, with the Blank Opti option.
Exercise 1: Blank Optimizer without web exclusions This exercise uses the model files: Incremental_Radioss: BlankOptiFinal.STA BlankOptiInitial.nas BlankOptimize_TargetLine_Radioss.iges Incremental_Dyna: final-dynain initial_dynain BlankOptimize_TargetLine.iges You do not have to load these files individually. When you start the Blank Optimizer, you need to indicate your root directory. This root directory should contain the files mentioned above. The function will load the appropriate model at the appropriate time in the task.
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Step 1: Open the file and select the root directory The model files are zipped in the tutorial location. Before proceeding, unzip the files and copy the files into a convenient working folder. This will be used as your root directory. 1.
From the Tools menu, select Blank Opti and then choose Select Root Directory. A dialog box pops up with the instructions about file format and their locations, as shown below.
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Incremental_Dyna dialog
2.
Click on Proceed. A dialogue box pops up asking you to change the exiting location of the root directory You need to point to the directory where the model files are stored. Please note that there cannot be any spaces in the root directory path.
3.
Click on Yes to change the directory, or No to accept the default directory. If Yes, browse the appropriate directory and click OK.
Step 2: Optimize the initial blank 1.
From the Tools menu, select Blank Opti and then choose Blank Opti Setup. The utility makes a comparison between the boundary of formed part and the target boundary to calculate the deviation. This deviation is applied to the initial blank and a new boundary for the blank is created as shown below.
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The zoomed area shows the deviation applied to the flat blank
Exercise 2: Blank Optimizer with Web Exclusions This process is typically used to optimize the blank shape for progressive die forming where the blank shape for optimization is considered excluding the webs connecting the continuous strip of blanks. This exercise uses the model files: Incremental_Radioss: BlankOptiFinal.STA BlankOptiInitial.nas BlankOptimize_TargetLine_WebExclusion_Radioss.iges Incremental_Dyna: final-dynain initial_dynain BlankOptimize_TargetLine_WebExclusion.iges
Step 1: Optimize the initial blank Before beginning, copy the files to a convenient working folder. This will be your new root directory.
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Note: Radioss and Dyna files should be kept in separate working folders. 1.
From the Tools menu, select Blank Opti and then choose Select Root Directory.
2.
Click on Proceed. A dialog box pops up asking you to change the exiting location of the root directory You need to point to the directory where the model files are stored. Please note that there cannot be any spaces in the root directory path.
3.
Click on Yes to change the directory, or No to accept the default directory. If Yes, browse the appropriate directory and click OK.
Step 2: Exclude web elements from the initial blank 1.
From the Tools menu, click Blank Opti and then Select Web Elements. The flat blank will load into the session with the web selection options
2.
In the Enter no.of webs field, type 1.
3.
Click on proceed.
4.
Click on elements and select approximately half of the elements, as shown in the figure below.
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Incremental Radioss selection
Incremental LsDyna selection
5.
Click on proceed.
6.
From the Tools menu, click Blank Opti and select Blank Opti Setup.
7.
In the file selection dialog, select BlankOptimize_TargetLine_WebExclusion_Radioss.iges for Radioss, and BlankOptimize_TargetLine_WebExclusion.iges for LsDyna.
8.
Click Open. This will apply the deviation to on half of the blank as opposed to full blank. Deviation compensated blank is shown below:
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Die Module The following Die Module tutorials are available:
HF-2005: Basic Addendum Creation Using Die Process HF-2010: Basic Addendum Creation HF-2020: Designing a Parametric Addendum HF-2030: Modifying a Parametric Addendum HF-2040: Parameterization of External Binder and Addendum Section Using Section Editor
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HF-2005: Basic Addendum Creation Using Die Process Die Process is a browser based approach for creating and editing addendum and eventually the die cavity. The addendum is a part of the die face and that facilitates the smooth and controlled flow of the metal into the die cavity. HyperForm allows you to create the addendum and construct a complete die with the part profile as the input. First a binder is constructed and the addendum is built connecting the part and the binder surface. The binder is then trimmed to get a complete die cavity. The addendum can also be created with different cross sections depending on the complexity of the part shape. You also have the flexibility of modifying the cross section of the addendum depending on the changes to the part design.
Exercise: Designing an Addendum with a Constant S-Section Step 1: Load the HyperForm file 1.
From the File menu, click Open....
2.
Browse to the file \tutorials\mfs\hf\die\cup_addendum.hf.
3.
Click Open.
Step 2: Import the draw bead line 1.
Click on the Import icon
2.
Select the Import Geometry icon
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3.
Click the file browser icon to select the file to import. From the installation directory used above, select the file drawbead.iges.
4.
Click Open.
5.
Close the Import tab.
Step 3: Establish the Die Process settings 1.
On the Die Process tab, under the Settings heading, right-click on Symmetry and select Edit, as shown below. This opens the Symmetry Setting panel.
2.
Make sure the toggle is set to full.
3.
Click return.
4.
In the Die Process tab, under Settings, right-click on Stamping Direction and select Edit. The Stamping Direction Settings panel opens.
5.
Ensure the direction is set to Z-axis.
6.
Click Set.
Step 4: Establish the Die parameters 1.
Under Die, right-click on Part: (none) and select Set....
2.
Select the part from the graphics screen and click proceed. Note that the name of the component appears in front of the label Part:. For this example, Part: Part appears.
3.
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Double-click on Thickness to edit it. Enter the thickness as 0.1.
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Step 5: Create a trim line 1.
Under Die, right-click on TL and select Create > From Part.
The trim line (a line representing the part boundary) will be created in a temporary collector called TL.
Step 6: Create the binder 1.
Under Die, right-click on Binder and select Create > From Part.
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The binder is created in a temporary collector called Binder.
Step 7: Create the addendum 1.
Under Die, right-click on Addendum and select Create > From Part.
The addendum is created in a temporary collector called Addendum.
Step 8: Create the draw bead on the die face 1.
Using the Model Browser, make sure that the display of drawbead.iges is turned on.
2.
In the Die Process tab, right-click on Drawbeads (optional) and select Create.
3.
Enter 6 in both the Radius and Fillet fields.
4.
Click create.
5.
Pick the binder surface from the screen and click proceed.
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6.
Select the line representing the drawbead on the binder (die face) and click proceed.
7.
Select one node above or below the binder.
8.
Click proceed. The drawbead is created along the line with the specified dimensions.
Step 9: Create the die cavity and mesh 1.
Right-click on the white space in the Die Process tab and select Trim Binder > With Addendum, as shown below.
2.
From the menu bar, click View > Toolbars > Display. Click on the Display Fixed Point icon turn off the display of the fixed point from the die.
3.
In the Model Browser, turn off the geometry display for all of the components to display a clear view of the meshed cavity die.
to
Step 10: Create the punch and binder 1.
In the Die Process tab, right click on Punch: (None) and select By Offsetting Part and Addendum….
2.
Enter a value for the offset. The offset distance will be the gap between the punch and the die, which should be equal to blank thickness+20% of blank thickness.
3.
Click on Offset+ or Offset- based on the direction of the vector.
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4.
Click Return.
The punch will be created in a collector named Punch. The object punch in the die process tree reflects the name of the punch component. 5.
Right click on Blank Holder: (None) and select By Offsetting Binder….
6.
Enter a value for the offset. The offset distance will be the gap between the punch and the die, which should be equal to blank thickness+20% of blank thickness.
7.
Click on Offset+ or Offset- based on the direction of the vector.
8.
Click return.
The binder will be created in a collector named Binder. The object binder in the die process tree reflects the name of the binder component. It is advised to keep the blank ready by using tools in the Radioss One Step profile prior to creating tools. You can also switch to the Radioss-Incremental user profile and use the functions Auto Process and/or User Process to setup the solver parameters for Radioss Incremental.
Punch and binder w ith the die
9.
Create a new component called Die Cavity and organize the elements of the binder, addendum, and part.
This tutorial is now complete.
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HF-2010: Basic Addendum Creation The addendum is a part of the die face and that facilitates the smooth and controlled flow of the metal into the die cavity. HyperForm allows you to create the addendum and construct a complete die with the part profile as the input. First a binder is constructed and the addendum is built connecting the part and the binder surface. The binder is then trimmed to get a complete die cavity. The addendum can also be created with different cross sections depending on the complexity of the part shape. You also have the flexibility of modifying the cross section of the addendum depending on the changes to the part design. This tutorial assumes that you are familiar with basic HyperMesh functionalities such as creating components, geometry cleanup, and meshing. Information on these topics can be found in the online help.
Tools This tutorial uses the following macros: From Elements macro under Create Trim Line Flat macro under Create Binder Edit Binder macro under Create Binder Constant S macro under Create Addendum Components macro under Setup of 1Step macro menu
Exercise: Designing an Addendum with a Constant-S Section
Step 1: Load the file 1.
From the File menu, click Open....
2.
Browse to the file \tutorials\mfs\hf\die\cup_addendum.hf.
3.
Click Open.
Step 2: Create a trim line for the part
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1.
Click Geometry > Line Design.
2.
In the part boundary subpanel, click elems >> displayed.
3.
Click create. Notice the message "Trim line is created" on the header bar. This creates a feature line forming the outline of the part that is stored in the ^feature component. This line will be used later as the trim line.
4.
Click return.
Step 3: Create a binder component and assign a material to it 1.
Click Applications > Radioss One Step. This opens the Radioss One Step user profile within HyperForm.
2.
Click Setup > Components. This opens the Components panel.
3.
Input Binder in the text field for Component:.
4.
Click on the materials button and select CRDQ Steel.
5.
Click on the color button and assign a color to the binder component.
6.
Click create.
7.
Click return.
Step 4: Create a flat binder 1.
Click Applications > Die Module. This brings you to the Die Module user profile.
2.
From the Geometry menu, click Binder. Select the flat subpanel.
3.
Input offset = 20.0 and set the toggle to full model.
4.
From the tool bar, select the
5.
With the nodes button highlighted, from the graphics area, click on the empty region below the model.
icon.
Notice a temp node is created.
6.
Click create. A flat binder is created on screen.
7.
Click return.
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Step 5: Translate a flat binder 1.
From the tool bar, select the top view on the binder surface.
2.
From the Utility Menu, under Create Binder click on the Edit Binder panel.
3.
Select the Translate subpanel.
4.
Make sure that the selector is set to binder.
5.
Switch the direction from N1, N2, N3 to Z-axis.
6.
Press keyboard F4 (the function key 4) to enter the Distance panel.
7.
With N1 highlighted, click and hold down the left mouse button and move the mouse cursor on an edge of the binder to highlight a line. Once the binder edge is highlighted, click on the line again to create a temp node.
8.
Repeat the procedure for N2, but click on any node on the part edge.
icon Notice that the original part is approximately centered
Notice the distance between N1 and N2 is measured and displayed. Refer to the image below:
9.
Note the value of z dist = . The distance in Z direction will be used later.
10. Click return. You are back to the Edit Binder panel. 11. With the noted value from the Distance panel, arrive at a value so that the distance is equal to 20mm between the binder surface and the top of the part. Enter that value in the Magnitude = field. (For example, if the previous value is 10.0, you will have to translate binder in negative Z direction by 10.0 to be able to achieve a distance = 20.0 between the binder and the part.) 12. Click on Translate+ or Translate- accordingly.
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Picture show ing the binder and the part
Step 6: Build the addendum 1.
Click Applications > Radioss One Step.
2.
Under Setup, click Components.
3.
Input Addendum right next to component:.
4.
Click on material: and select CRDQ Steel.
5.
Click color and select a color.
6.
Click create.
7.
Click Applications > Die Module.
8.
From the Geometry menu, click Addendum, and select the Constant S-section subpanel.
9.
Click the line button next to TL:. With the line button highlighted, pick the trim line created in step 2 from the graphics screen (stored in the ^feature component). Once the line is picked, it highlights in white color and the surf button next to Binder: is highlighted in the panel area.
10. With the surf button highlighted, click on the binder surface from the graphics screen. 11. Click on the purple parameters button. This takes you to the control parameters for addendum creation. Plus length: A straight line section added to the outer edge of a part (10 mm default). Wall angle: Section wall angle (15 degrees default). Entry radius: Die entry radius (10 mm default). Constrain plus to part: Plus length will be constrained so that it is tangent with respect to the edge of the part. (ON by default). Enable fixed points: Fixed points will be placed along the edge of the new addendum surface if a finite element mesh exists. If the nodes lie along the edge and are within a tolerance, a fixed point will be generated. (ON by default). Split into small faces: Generated surfaces are divided into smaller areas in order to simplify their definition while reading and manipulating them in other CAD systems. (ON by default).
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12. Enter plus length = 3.0, wall angle = 5.0 and entry radius = 3.0. 13. Click return. 14. Click on the create addendum button. This creates an addendum forming a smooth connection between the part and the binder surface. 15. Click return.
Step 7: Edit the model to arrive at the final die cavity 1.
From the Preferences menu, click on Meshing Options. Select the graphics subpanel and uncheck the fixed points option. Click return to close the panel.
2.
Click Geometry > Edit > Surfaces > Trim with lines.
3.
From the toolbar, select the
4.
Highlight the surfs button under with lines and pick the binder surface from the graphic screen.
5.
Click on the yellow lines button below the surfs button. From the graphics screen, click and hold down the left mouse button and move the mouse cursor to highlight the entire surface edge of the created addendum. Refer to the image below:
top icon.
Highlight the entire surface edge of the addendum
6.
Click on the first toggle below the lines button to make the option as normal to surface.
7.
Verify the lower toggle is set to entire surface.
8.
Click on the trim button. This will trim the binder covering the die cavity.
9.
Click on return.
10. From the toolbar menu, select the bottom
icon.
11. Press F2 on the keyboard. This will take you to the Delete panel. 12. Set the yellow entity selector to surfs. 13. Click at the center of the binder to highlight the portion of the binder (which was trimmed out in steps 6 through 10) covering the die cavity.
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14. Click on the delete entity button. This will give the final die cavity with the addendum and the die face.
Pictures show ing the final die w ith the addendum.
Step 8: Save the file 1.
From the File menu, click Save As....
2.
Enter the file name as cup_complete.hf.
3.
Click Save.
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HF-2020: Designing a Parametric Addendum The addendum is a part of the die face that facilitates the smooth and controlled flow of the sheet metal into the die cavity. HyperForm enables you to rapidly create a parametric addendum and construct a complete die with the part profile as the input. First a developable binder is constructed and then the addendum is built connecting the part and the binder surface. The binder is finally trimmed to get a complete die face. An addendum can be created with single or multiple cross-sections depending on the complexity of the part shape. You also have the flexibility of parametrically modifying the cross-sections of the addendum in order to create different die geometries. Three exercises are contained in this tutorial: Exercise 1: Geometry cleanup for creating an addendum Exercise 2: Building an addendum for a flat binder Exercise 3: Building an addendum for a curved binder using Rib Editor
Tools This tutorial uses the following features: From Elements macro under Create Trim Line Flat macro under Create Binder Edit Binder macro under Create Binder Constant S macro under Create Addendum Components macro under Setup of 1Step macro button Spline macro under Create surfaces from Edit geometry button Rib Editor
Exercise 1: Geometry cleanup for creating an addendum This exercise uses the model files die_module_ex1.hf, die_module_ex2.hf, and die_module_ex3.hf
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Step 1: Retrieve the file 1.
From the File menu, click on Open.
2.
Browse to the file \tutorials\mfs\hf\die\Die_module_ex1. hf.
3.
Click Open.
Step 2: Prepare the part edge geometry Before generating an addendum surface, it is important to ensure that the part edge geometry or trim line (TL ) is sufficiently defined. Any sharp transitions or cutouts along the TL should be filled. Several geometry creation tools are available in HyperForm for this type of preparation, which are shown in the following steps. 1.
From the View menu, click Toolbars and then select Display. The Display toolbar menu is now displayed.
2.
Repeat Step 1 to turn on the Visualization toolbar.
3.
From the Visualization toolbar, select Geometry Color Mode and change to
By Topo .
Notice the color of the model is changed and topology definitions are displayed on screen. 4.
Click the User View icon
5.
In the Utility Menu, click Edit Geometry.
6.
Click the Spline button.
7.
Click the entity selector switch
8.
Click the switch in the middle of the panel and select surface only.
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and click restore1 to retrieve the saved Notch1 view.
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9.
Verify that keep tangency is active.
10. Click on the red line as shown in the figure below and click create to make it green. This will build a surface covering the notch.
11. From the toolbar, select the User View icon
and click restore2 to retrieve the saved Notch2 view.
12. You are still in the Spline panel. Click on the red lines as shown below to fill the surfaces.
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13. From the toolbar, select the User View icon view.
and click restore3 to retrieve the saved Fillet corner1
14. Click on the red lines as shown below to fill the surfaces:
15. From the toolbar, select the User View icon view.
. Click restore4 to retrieve the saved Fillet corner2
16. From the Utility Menu under Create Surfaces, click on the Sweep button. 17. In the drag geoms subpanel, click the toggle next to drag: and set it to line list. In the same row, set the toggle to use default vector. 18. Click the toggle to set the option surface only. 19. Click the drag: line list button and click the red line as shown in the figure below. 20. Click the along: line list button and click the red line as shown in the figure below. 21. Click drag.
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22. Repeat the above two steps to close the other surface as shown below. The next two steps are optional and can be skipped if you see all green-shared edges without any red edges. 23. (Optional) Click keyboard F11 to jump to the Quick edit panel. 24. (Optional) Click the line panel right next to toggle edge:. With the line panel lines active, graphically click the any interior red lines (free edges) within the circle regions in the image below. This changes the selected red free edges into green shared edges.
25. From the Utility Menu, click on the to continue the Create models window.
7.
Click Add Model….
8.
Select Model type: HyperMesh from the drop-down menu.
9.
Click OK.
in the upper right of the
A new model is added to the list. Notice the Solver is set to Radioss. 10. Click Next > to continue to the Design Variables dialog. 11. Click Add Model Parameter…. The Model Parameters dialog opens.
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12. In the model tree, open the Shape, Drawbead, and Blankholder collectors. 13. Hold down the ctrl key and left-click to select all shapes, drawbead variables and blankholder variables, except bh.friction. 14. Click Add. Notice all the selected variables are passed to the location under HyperStudy Parameters.
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15. Click OK. You return to the HyperStudy dialog. 16. Click the blank space to the left of each row, which contains information pertaining to a shape variable. 17. Type –1.0 in the Lower bound: text box for all shape variables. 18. Type 1.0 in the Upper bound: text box for all shape variables. 19. Click the blank space left next to rows which contain information pertaining to drawbead restraining forces (db1.restraintforce, db2.restraintforce, db3.restraintforce) and blankholder tonnage (bh. tonnage). 20. Repeat steps 17 and 18 using a Lower bound: of 0.0 and an Upper bound: of 200. 21. Click Next > to continue to the Do nominal run window. 22. In the Solver input file field, enter part1b_opti.parm.
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This is the name of the input file created by HyperStudy for the RADIOSS solver. 23. Choose Radioss from the drop down menu as the Solver execution script. The input to HyperForm will be part1b_opti.parm. You do not need to edit the Solver input arguments field.
Step 4: Perform the base run 1.
Click Write and then Execute. or Write/Execute.
2.
When the operation is complete, a message is displayed: End executing model(s) for approach ( Nom_1() )
3.
HyperStudy calls the RADIOSS solver to solve the model file without applying any design variables. This is called a nominal run. A nom_run directory is created inside the study directory. The data to evaluate the objective function is available under the file part1b_opti_opt.dat. The constraint can be evaluated from the data under the file part1b_opti.dat. These two files are the output of the nominal run.
4.
Click Next >.
Step 5: Create a response that corresponds to the objective function 1.
The Create responses panel is displayed.
2.
Click Add Response….
3.
Click OK to accept the default values.
4.
Verify that the box next to Response_1 is checked.
5.
Click Expr Builder…. The Response Expression Builder is displayed.
6.
On the Vectors tab, click Add. This adds a result vector called Vector 1.
Step 6: Define the vector 1.
Click the browser button under the Vector resource file field and select the part1b_opti_opt. dat file from the /study directory/nom_run/m_1/ directory.
2.
Define Vector 1 by choosing the following options from the pull-down menus in the lower right-hand section of the Vectors tab: Type:
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Request:
FLD
Component:
Distance 1
3.
Click Apply to use this vector in the Response expression field.
4.
Click in the Response expression field window and enter the following expression: sum(v_1*v_1). The meaning of this expression is: take a sum of the squares of the distance between each strain coordinate and the quality function.
5.
Select the Evaluate expression check box.
6.
Notice the function sum (v_1*v_1) is changed to a value of 55.8369.
7.
Click OK.
Step 7: Create another response corresponding to the constraint 1.
Repeat the previous steps to create a second response -- Response_2 and click Add to create Vector 2.
2.
Click the browser button under the Vector resource file field and select the part1b_opti.dat file.
3.
Define Vector 2 by choosing the following options from the pull-down menus in the lower right-hand section of the Vectors tab: Type:
HyperForm Results
Request:
FLD
Component:
Thickness Strain
4.
Click Apply to use this vector in the Response expression field.
5.
Click in the Response expression field window and enter the following expression: mean(sort(1, v_2)[0:49:1]). The meaning of the this expression is : 1) sort all the elemental thickness values in descending order, 2) extract the top 50 values, and 3) calculate the mean of those values. The result is a scalar representing the mean value of the top 50 thickness strain values in the model.
6.
Select the Evaluate expression check box. The expression mean(sort(1,v_2)[0:49:1]) should change to the corresponding value 45.022
7.
Click OK. This completes the Study setup. You can now proceed to the desired study type whether it is a DOE, Optimization, or Stochastic study.
Step 8: Bypass link design variables and sensitivity analysis HyperStudy can perform design variables linking and sensitivity analysis. In this exercise, you will bypass both and perform only optimization study.
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1.
Click Next > to continue to the Link design variables window.
2.
Click Next > to continue to the Sensitivity window.
Step 9: Run the optimization study 1.
Click Continue to… and select Optimization study. Or simply click the blank box for Create optimization in the navigation tree.
2.
Click Add Optimization….
3.
Click OK on the dialog box accepting the default values.
4.
Select Adaptive response Surface Method from the pull-down menu next to Optimization Engine.
5.
Click Next to continue to the Design Variables dialog. This allows you to review your design variables.
6.
Click Next > to continue to the Constraints dialog.
7.
Click Add constraint….
8.
Click OK.
9.
Choose Response_2 in the Apply constraint on: field.
10. Click to continue to the Define objective dialog. 12. Click Add objective. 13. Click OK. 14. Select Response_1 from the Apply On drop-down field. 15. Select Minimize in the Goal drop-down field. 16. Select 100 for Maximum number of iterations:. None of the other parameters need to be altered. 17. Click on the Advanced Parameters tab. 18. For the On failed analysis column, select ignore failed analysis. When ignore failed analysis is selected, optimization takes a step back and attempts another analysis when a failed analysis is detected. 19. Click Launch Optimization to launch the optimization. 20. Click Yes to A message window display "Do you wish to sk ip the solver run for starting point and extract results from _nom run".
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An information window informs you about the way the optimization is run. Either interactive mode or batch mode is possible. The mode can be changed by using the Tools drop down menu on the HyperStudy menu bar and selecting Job management…, and then Optimization Study. 21. After the optimization has finished, continue from the Post-processing window.
Step 10: View the iteration history of the optimization study In each of the tabs; Obj & Consr., DV, and Responses boxes are displayed with the labels of their respective functions. 1.
Click a check box to display the appropriate iteration history.
Step 11: View the results of the optimization study 1.
Open the file opti_1.hyperopt from study directory and go to the end of the file to find the iteration number that corresponds to the optimal design.
2.
Open HyperForm and import the part1b_opti.parm file from the directory that corresponds to the optimal run.
3.
From the Run Analysis panel, click load results.
4.
Create fld plots and compare it with the initial run.
5.
(optional) Save as a HyperForm model file.
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Result Mapping The following Result Mapping tutorials are available:
HF-5000: Using Results Mapper in HyperCrash HF-5100: Result Mapping Using Process Manager
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HF-5000: Using Result Mapper in HyperCrash In this tutorial, you will learn the procedure for mapping forming results onto structural models using the HyperWorks Results Mapper. In real time practice, you may come across situation where the end results of formed parts have to be considered when it goes as a part of an assembly for structural analysis to depict a more realistic situation. To achieve this, HyperWorks Results Mapper is used. HyperWorks Results Mapper (HWRM) is a HyperCrash based tool that provides a framework to initialize a structural model with results from a forming simulation. You will go through a simple procedure loading the structural model and forming simulation results followed by mapping the results and finally exporting the mapped data in a structural solver format. For output, the structural solvers currently supported are RADIOSS Y, Radioss STA, ABAQUS and Radioss BULK. The results are transformed as necessary if the forming and structural models are in different co-ordinate frames. In this tutorial, you will first import the structural model and find a region on it which is almost similar to a region on the formed component. This region identification is the reference for the Results Mapper. Then, you will import the results of the formed component, identify the same region, and map the forming results to the structural model. This tutorial assumes that you are familiar with HyperCrash. If you need help on these topics, please refer to the corresponding tutorials in the online help. Results Mapper can be accessed by clicking Start > Altair HyperWorks 11.0 > Manufacturing Solutions > Results Mapper.
Exercise: Mapping the forming data from a STA file onto a Radioss mesh This exercise uses the models: EndOfFormingResults.sta MeshToBeMapped_0000.rad MeshToBeMapped_0001.rad
Step 1: Load the structural model into HyperCrash 1.
Click Start > Altair HyperWorks 11.0 > Manufacturing Solutions > Results Mapper
2.
In HyperCrash, click on File, then click Import and select Radioss, as shown in the figure below.
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3.
Browse and locate the file MeshToBeMapped_0000.rad. Click OK to open the file.
4.
The Import Choice for Units dialog is displayed. Click on Ignore and Import.
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5.
Click on Process and then select Results Mapper from the menu, as shown below.
This will bring up Results Mapper inside HyperCrash as shown below.
Step 2: Load the STA file into HyperCrash
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1.
Click on the Load Stamping File icon
2.
Click on Radioss and browse and locate the file EndOfFormingResults.sta.
3.
Click on the file and click OK to bring the file into the session.
4.
Click on the model name as shown in the red box below to highlight it and click on the glasses icon to display the model in the small screen.
inside the Result Mapper.
Step 3: Position the STA file to align it with the target model Upon loading the files, the STA file, which is in the forming coordinate system, and the target model, which is in the car coordinate system, appear on top of each other as shown below:
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1.
Click on the Positioning button.
2.
Click on the third option, as shown in the red box below:
3.
Click on the arrow next to node Id below the header First couple of nodes.
4.
Pick the first node on the horizontal model shown on the left hand side of the image below.
5.
Rotate the model by ~90 degrees (press and hold the Ctrl button and left mouse button, move the mouse to rotate) to make the second selection as shown on the right hand side of the image above.
6.
Follow steps 4 and 5 to select 2 more corner node pairs as the second couple of nodes and the third couple of nodes. Refer to the image below:
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7.
Click on Optimize.
8.
Click on Allow Rotation.
9.
Click on Apply move.
10. Click on Ok in the bottom left hand corner to validate and accept the positioning.
Step 4: Map the results from STA mesh to structural mesh 1.
Click on the include picked part icon
2.
Graphically select the structural model from the screen. The selected part name is displayed within the Results Mapper in the right hand column.
3.
Click Yes on the right hand bottom corner of the screen as shown below.
4.
Click on Map Results at the bottom of the Result Mapper. The results are mapped and are shown in the Results Mapper area.
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Step 5: Change result type and export mapped mesh 1.
Click on the Contour tab. At this point, you may need to expand the Results Mapper tab by dragging the right side bar further out. This will enable you to see the entire Contour tab of the Results Mapper.
2.
In the Type of Value: field, select Plastic Strain from the drop down menu.
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Notice that the mapped data changes to Plastic Stain both for STA mesh and the structural mesh. 3.
Use the arrows in the On integration point: field to change the value in the box. Notice that the mapped result type is automatically updated with the new data.
4.
Click on the Output tab.
5.
Click on the Browse button.
6.
Navigate and select the destination folder.
7.
Type PlasticStrain.inp in the field and click on OK.
8.
In the File Format field, select Abaqus.
9.
Make sure the Thickness, Plastic Strain and Stress Tensor fields are checked.
10. Click on Export. The file is exported.
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HF-5100: Result Mapping Using Process Manager In this tutorial, you will learn the procedure for mapping forming results onto structural models using the HyperWorks Results Mapper. In real time practice, you may come across situation where the end results of formed parts have to be considered when it goes as a part of an assembly for structural analysis to depict a more realistic situation. To achieve this, HyperWorks Results Mapper is used. HyperWorks Results Mapper (HWRM) is a Process Manager-based tool that provides a framework to initialize a structural model with results from a forming simulation. A Process Manager template takes you through a step-by-step approach starting from loading the structural model and forming simulation results into Fepre and HyperView respectively, followed by choosing the data to map and finally exporting the mapped data in a structural solver format. Any scalar, vector or tensor data that can be read into HyperView can be chosen for mapping. For output, the structural solvers currently supported are RADIOSS (Bulk Data Format) and OptiStruct, Nastran, LS-DYNA and Abaqus. The results are transformed as necessary if the forming and structural models are in different co-ordinate frames. Some amount of geometric difference between the forming and structural model is tolerated. In this tutorial, you will first import the structural model and find a region on it which is almost similar to a region on the formed component. This region identification is the reference for the Results Mapper. Then, you will import the results of the formed component, identify the same region, and map the forming results to the structural model. This tutorial assumes that you are familiar with HyperView. If you need help on these topics, please refer to the corresponding tutorials in the online help. Note:
Starting version 11.0, HyperWorks Results Mapper is in maintenance mode. Results Mapping Using HyperCrash is recommended as a general purpose mapping tool.
Tools To do results mapping using the Process Manager, first launch HyperView and then load the Process Manager template file. Once the template file is loaded, the tutorial can be completed.
Exercise: Mapping Forming Analysis Results onto Structural Models This exercise uses the model files mapping.hf.
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Step 1: Launch HyperView and load the template 1.
Launch HyperView by clicking Start > Programs > Altair HyperWorks > HyperView.
2.
Click View > Browsers > HyperWorks > Process Manager.
3.
Click in the Load template: field and select Browse...
4.
Navigate to the following location \hw\tcl\fepre\hwrm and select the file hwrm.pmt.
5.
Click Open.
6.
In the Create/Open Process Instance dialog, enter a name and location in the appropriate fields to create a new instance.
7.
Click Create/Open.
Step 2: Load the structural model 1.
In the Type: field, select HM/HF (the structural file format).
2.
Click Browse… next to the File name: field and select the file containing the structural model mapping.hf.
3.
Click Import. The application automatically switches to HyperMesh and the User Profile dialog opens. Accept the default user profile and click OK.
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Notice the structure file is imported into the Process Manager tab. The first step is checked with a green mark indicating its completion.
Step 3: Select the structural part and its orientation for mapping 1.
Make sure the Components button is active. Click on Components and graphically select any element from the displayed component to be mapped.
2.
Click the top view icon
3.
Click the node list button and select three nodes and a base node on a region of the selected component so that the same region can be identified on the component from forming analysis. The image below shows the location of the nodes on the structural model.
4.
Click Apply.
to change to top view.
Notice the second step is checked on the Process Manager tab.
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Step 4: Load the forming results model 1.
In the tutorial folder, unzip HWRM_forming_result.zip. All the D3PLOTXX files form analysis results previously created by LS-DYNA into the same folder.
2.
For both the Model file name: and Result file name: fields, click Browse… and select the d3plot file from the forming simulation, as shown in the image below.
3.
Click Import.
Note:
The operation opens a second window in HyperWorks Desktop. The window on the left (HyperMesh) contains the structural model and the right window (HyperView) contains the formed component.
Step 5: Display the formed part For this set of steps, make sure the HyperView window is the active window. With the blue halo surrounding the forming result window (right window), by the following: 1.
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Click on the Results tab to open the Results Browser.
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2.
Expand the Components folder. Right-click on Shell 2 and select Isolate to turn off the display of all components except the blank (or the formed component).
3.
Click on the Shaded Elements and Mesh Line icon component.
4.
Click the top view icon
to turn on the mesh for the displayed
to change to top view.
Notice the structure and forming mesh are different as shown in the image below.
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Step 6: Select mapping parameters on the formed part 1.
With the yellow Components button highlighted as shown below, click on the formed part on the graphics area to highlight it.
2.
Make sure that the N1 N2 N3 option is selected in the Aligning plane: field. If another option is selected, click the toggle switch and select N1, N2, N3 option from the pull down menu as shown below:
3.
Highlight the displayed formed component by clicking on it once. With N1 highlighted, click on the nodes of the formed component in an order as shown in the image below. Notice that this region corresponds approximately to the same nodes of the structural part.
4.
From the Mapping Parameters pull-down list, select the parameter that needs to be mapped, such as thickness, strain, etc. For this exercise, select Thickness.
5.
Verify that both Model scaling and Result scaling are set to 1.0.
6.
Click Apply.
Step 7: Map and export data 1.
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From the Templates: pull-down list select the format for export (example: RADIOSS (Bulk Data Format) and OptiStruct, Nastran, LS-DYNA and Abaqus) as shown below. In this exercise, select Nastran.
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2.
Click the Browse… button next to the File name field and specify the name result.dat for exporting.
3.
Click Save.
4.
Click Exec. A new animation window opens displaying the contours of the mapped result on the structural model.
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5.
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Open the result.dat file using any ASCII text editor. Notice thickness results are mapped as nodal thickness. This result.dat file can also be included in the model file for further analysis.
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HF-6000: Die Structure Optimization The Die Structure Optimization process is a function used to automatically transfer tool contact forces from stamping analysis to a structural model and an easy step-by-step setup of die structure optimization model. The Die Structure Optimization process consists of two steps: Die Stress analysis Die Optimization
Tools Die Stress Analysis and Die Optimization features are under the Applications menu.
Exercise 1: Set up and run Die Stress Analysis This exercise uses the model file DieStress.hf
Step 1: Launch Die Stress analysis 1.
Click on the open .hm file icon and browse to the file \tutorials\mfs\hf\Opti\DieStress.hf
2.
From the Applications drop down menu, select Die Stress Analysis. The Create/Open Process Instance dialog is displayed, as shown below.
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3.
Click on the file browser icon
4.
Click Create/Open.
and designate the folder where you want to run the analysis.
The Process Manager tab appears in the tab area. The Process Manager is a step by step approach to preparing and running Die Stress Analysis.
Step 2: Setup Die Stress Analysis 1.
In the panel area, Steel is shown as the default material in the Material field. Click Apply. Notice that the white check mark turns green for Tool Material in the Process Manager tab.
Note:
Clicking on Apply at each step will turn the white check mark green in the Process Manager and a white check appears for the next option.
2.
For the Result file field, select either Radioss or LS-Dyna as the stamping solver.
3.
Click on Browse… and locate and load the results of the forming analysis. In this exercise you will use the file LawnMower2A001.
4.
Click Apply. The Process Manager launches HyperView to query the model and create a list of components that are available in the stamping model. Once the results are brought back into HyperForm, you will be able to select which tool to extract the contact forces from.
5.
For the Result part field, select Punch and click Apply. This is the tool from which forces are extracted at the last step of forming analysis. This will launch HyperView for a moment and will close on itself.
6.
Click on Components: and select the skin of the Die component from the screen. This will be the part onto which the loads will be mapped.
7.
Click proceed.
8.
Click Apply.
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Step 3: Display only the Punch component 1.
In the Model Browser, click on the plus symbol next to LoadCollector to expand the tree.
2.
Turn off the loads display by clicking on the mesh icon next to operational.
3.
Expand the Components folder, and click on the mesh icon to display the Punch_solid component.
Step 4: Define holding and lifting points on the structural model 1.
Click on the Process Manager tab.
2.
Click on Nodes twice and select By Sets.
3.
Select the Holding component. Notice that the bolt location nodes of the die are highlighted on the screen.
4.
Click select.
5.
Click proceed.
6.
Click Apply.
7.
Click on Nodes twice and select Lift. Notice the set of nodes on the die gets highlighted on the screen.
8.
Click select.
9.
Click proceed.
10. Click Apply. 11. Enter 1500 in the lifting height: field. 12. Click on Apply. This will create rigid elements connecting the nodes selected on the lifting location of the punch to the CG of the model as shown below.
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13. Click on Apply. 14. Click on Browse and select a location to save the file. Enter the name with a .FEM as the extension. 15. Click on save. 16. Click on Export to produce the input file. 17. Click on Export&Run to produce the input file and run stress analysis. Note: Make sure that all the steps on the Process Manager tree has a green tick mark which indicates that all the steps were successfully completed. Stress analysis on the punch is done in the background. The results of the stress analysis will be the input for Die Structure Optimization.
Exercise 2: Set up and run Die Structure Optimization Die Optimization can be accessed from the Applications menu.
Step 1: Setup the model for optimization 1.
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Select the Design component under Status column, as shown in the figure below:
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2.
Click on Apply.
3.
Enter 25.0 in the Min Member Size: field.
4.
In the Draw Direction: list, select Z.
5.
Click on Apply.
6.
In the Volume Fraction: field, enter 0.3.
7.
Click on Apply.
8.
For Objective:, select Max Stiffness.
9.
Click on Apply.
10. Next to the Export File: field, click on Browse and enter a file name with the extension .fem. 11. Click on Save. 12. Click on Export to create the input file for optimization. 13. Click on Export&Run to create the input file and run the optimization.
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