CAD ANALYSIS LAB MANUAL 2015 S6 Mechanical

ST.THOMAS INSTITUTE FOR SCIENCE AND TECHNOLOGY (STIST) THIRUVANANTHAPURAM

DEPARTMENT OF MECHANICAL ENGINEERING

CAD ANALYSIS LAB LABORATORY MANUAL 2015

DEPARTMENT OF MECHANICAL ENGINEERING ST.THOMAS INSTITUTE FOR SCIENCE AND TECHNOLOGY THIRUVANANTHAPURAM

08.607 CAD ANALYSIS LAB LABORATORY MANUAL 2015

Name: Roll No:

CONTENTS Title

Page No.

Introduction to Solid Edge

1

PART 1: PART MODELING

6

Exercise 1

7

Exercise 2

7

Exercise 3

8

PART 2: ASSEMBLY MODELING

9

Exercise 4

10

Exercise 5

11

Exercise 6

12

Exercise 7

13

Exercise 8

14

Exercise 9

15

Exercise 10

16

Introduction to Femap

17

PART 3: ANALYSIS

20

Exercise 11

21

Exercise 12

21

Exercise 13

22

Exercise 14

22

Exercise 15

23

Exercise 16

23

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

INTRODUCTION TO SOLID EDGE Solid Edge, a product of Siemens, is one of the world’s fastest growing solid modeling software. Solid Edge with Synchronous Technology combines the speed and flexibility of direct modeling with precise control of dimension-driven through precision sketching, region selection, face selection, and handle selection. Solid Edge ST4 integrates the synchronous modeling with the traditional modeling into a single environment. It is an integrated solid modeling tool, which not only unites the synchronous modeling with traditional modeling but also address every design-through-manufacturing process. In Solid Edge, the 2D drawing views can be easily generated in the drafting environment after creating solid models and assemblies. The drawing views that can be generated include orthographic views, isometric views, auxiliary views, section views, detail views and so on. The user can use any predefined drawing standard file for generating the drawing views. The user can display model dimensions in the drawing views or add reference dimensions whenever he wants. The bidirectional associative nature of this software ensures that any modifications made in the model is automatically reflected in the drawing views. To make the design process simple and efficient, the software package divides the steps of designing into different environments. This means, each step of the design process is completed in a different environment. Generally, a design process involves the following steps:   

Sketching by using the basic sketch entities and converting them into features or parts. These parts can be sheet metal parts, surface parts or solid parts. Assembling different parts and analyzing them Generating drawing views of the parts and the assembly.

Solid Edge supports data migration from various CAD packages such as IDEAS, AutoCAD, Mechanical Desktop, Pro/E, Inventor, CATIA, and NX documents. As a result, all files and documents created in these software into a Solid Edge document.

Solid Edge Environments To reduce the complications of a design, this software package provides you with various design environments. a. Part Environment This environment is used to create solid as well as surface models. The part environment consists of two environments namely Synchronous Part and Ordered Part. Synchronous is the default environment in ST4. In this environment, there is no separate environment to draw sketches; rather the sketching tools are available in the Synchronous Part environment itself. b. Assembly Environment This environment is used to create an assembly by assembling the components that were created in the Part environment. This environment supports animation, rendering, piping, and wiring.

Page

This environment is used for the documentation of the parts or the assemblies in the form of drawing views. The drawing views can be generated or created. All the dimensions added to

1

c. Draft Environment

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

the component in the part environment during its creation can be displayed in the drawing views in this environment. d. Sheet Metal Environment This environment is used to create sheet metal components. e. Weldment Environment This environment enables you to insert components from the part or the assembly environment and apply weld beads to the parts or the assembly. This environment is associative with the part and assembly environment.

User Interface of Solid Edge Prompt Line: If the user invoke a tool, the prompt line is displayed below the command bar. This line is very useful while creating a model, because it provides the user with the prompt sequences to use a tool. PathFinder: The PathFinder is present on the left of the drawing area. It lists all occurences of features and sketches of a model in a chronicle sequences. Docking Window: The docking window is available on the left of the screen and remains collapsed by default. It has different tabs on the top. These tabs can be used to activate the feature library, family of parts etc. Ribbon: The Ribbon is available at the top of the solid edge window and contains all application tools. It is a collection of tabs. Each tab has different groups and each group is a collection of similar tools. Quick Access toolbar: It is available on the top-left of the title bar of the solid edge window. It proves an access to the frequently used commands such as New, Open, Undo, Redo, Save and Print. Application Button: It is available on the top left corner of the solid edge window. It is present in all environments. On choosing this button, the Application menu containing the options for creating, opening, saving, and managing documents will be displayed. Status Bar: It is available at the bottom of the solid edge window. It enables the user to quickly access all the view controls like Zoom Area, Zoom, Fit, Pan, Rotate, Sketch View, View Orientation, and View styles. QuickBar: It provides the command options for the active tool. Assembly Environment Tabs: There are several tabs in the Ribbon that can be invoked in the part environment. vi. Inspect vii. Tools viii. View

2

Home Features PMI Simulation Simulation Geometry

Page

i. ii. iii. iv. v.

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Assembly Relationships The assembly relationships are the logical operations that are performed on the component to assemble at their respective work in position in an assembly this relationship played to reduce the degrees of freedom of the components Mate: This relationship is used to make the selected face of the different components coplanar. You can also specify some offset distance between the selected faces. Planar Align: This relationship enables you to align a planar face with the other planar face. Axial Align: This relationship enables you to make a cylindrical surface coaxial with the other cylindrical surface. Insert: This relationship is used to mate the phases of two components that are actually symmetric and also to mate their axes coaxial. Connect: This relationship enables you to connect two keypoints, line, or a face on two different parts. Angle: This relationship is used to place the selected faces of different components at some angle with respect to each other. Tangent: This relationship is used to make the selected face of a component tangent to the cylindrical, circular or conical faces of the other component. Cam: This relationship applies the cam-follower relationship between a closed loop of tangent face and the follower face. Parallel: The parallel relationship is used to force two edges, axes or an edge and an axis parallel to each other.

Page

3

Gear: The gear a relationship allows you to apply rotation-rotation, rotation-linear, or a linearlinear relationship between two components.

Application Button Quick Access toolbar

Groups

Ribbon

PathFinder

Base Coordinate System

Docking Window

View Orientation Triad

Status bar

Solid Edge ST4 Assembly environment

4

Page

Quick Bar

Assembly Relationships

Tabs in Assembly Environment

PART 1: PART MODELING

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Exercise 1

Exercise 2

Page

7

Φ19

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

8

Exercise 3

PART 2: ASSEMBLY MODELING

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

10

Exercise 4: FLANGED COUPLING (Protected Type)

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

11

Exercise 5: UNIVERSAL COUPLING (Hook’s Joint)

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

12

Exercise 6: SOCKET AND SPIGOT JOINT (Cotter Joint)

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

13

Exercise 7: SLEEVE AND COTTER JOINT (Cotter Joint with Sleeve)

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

14

Exercise 8: GIB AND COTTER JOINT (Strap Joint with Gib and Cotter)

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

15

Exercise 9: CROSS HEAD (Horizontal Type)

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Page

16

Exercise 10: KNUCKLE JOINT (Pin Joint)

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

INTRODUCTION TO FEMAP Femap (Finite Element Modeling And Postprocessing) is an engineering analysis program sold by Siemens PLM Software that is used to build finite element models of complex engineering problems ("pre-processing") and view solution results ("post-processing"). It runs on Microsoft Windows and provides CAD import, modeling and meshing tools to create a finite element model, as well as postprocessing functionality that allows mechanical engineers to interpret analysis results. The finite element method allows engineers to virtually model components, assemblies, or systems to determine behavior under a given set of boundary conditions, and is typically used in the design process to reduce costly prototyping and testing, evaluate differing designs and materials, and for structural optimization to reduce weight. Product simulation applications include basic strength analysis, frequency and transient dynamic simulation, system-level performance evaluation and advanced response, fluid flow and multi-physics engineering analysis for simulation of functional performance. Femap is used by engineering organizations and consultants to model complex products, systems and processes including satellites, aircraft, defense electronics, heavy construction equipment, lift cranes, marine vessels and process equipment.

Features of FEMAP CAD-Independent Femap is CAD-independent and can access geometry data from all major CAD systems including CATIA, Pro/Engineer, NX, Solid Edge, SolidWorks and AutoCAD. Once imported you can prepare the model for analysis using the geometry locator to identify and display potentially troublesome entities, such as slivers, and either remove them completely with the geometry cleanup tools or suppress them. Femap also offers a wealth of geometry creation and modification functions so you can make necessary model changes in preparation for finite element model creation. Finite Element Modeling The full finite element model with underlying data is fully exposed by Femap, allowing you to view, create or modify entities directly. Femap’s grouping, layering and visualization tools help you to manage model display while creating and setting up the finite element model.

Mid-plane extraction of thin-walled structures to aid creation of more efficient and accurate shell models



Weldment modeling that connects discrete solid welded parts together into a contiguous model



Data surfaces that allow you to create complex loading conditions based on prior analysis output for multi-physics applications

Page



17

Femap includes specialized capabilities to help with modeling tasks including:

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Finite Element Meshing Femap’s 3D solid and surface meshes are tuned to generate high-quality meshes, providing well-shaped elements to ensure accurate results. Femap gives you full control over all mesh generation parameters including mesh sizing, meshing of small features, growth factors, short edge suppression, etc. With complex geometry, modification of the mesh is often required in areas where greater accuracy is desired. For this situation Femap’s Meshing Toolbox allows you to interactively modify mesh sizing parameters on the underlying geometry, and see the mesh update automatically. You can also view element quality feedback live while modifying the mesh, to ensure that a high-quality finite element model is created. Assembly Modeling Femap with NX Nastran supports assembly modeling, including automatic contact detection that determines the components initially in contact. The contact regions can be set to be simply in contact (with or without friction) or glued together. The contact calculations performed by NX Nastran are iterative and update during the solution, to take into account deformation changes representing the true contact condition in the final results. Other types of component assembly modeling techniques also supported include spot-weld, fastener elements, and bolted joints with optional pre-loading. Beam Modeling Besides solid and shell element models Femap also supports beam modeling and meshing. This technique allows models comprising long, slender components (for which a solid meshing approach would create a large, unwieldy model) to be represented by one-dimensional elements with associated properties. Model visualization is key to beam modeling, and with Femap you can view these elements as solid components and include offsets. Femap features a section property editor which includes a library of standard cross-section shapes. You can also define your own sections, and the built-in section property calculator automatically determines the required properties. Also available are full beam visualization and results display options including shear and bending moment diagrams. Composite Modeling The use of composite materials in designs has increased significantly in recent years, and Femap can help you model and postprocess results on composite structures. With Femap’s a laminate editor and viewer, you can update the laminate properties interactively as you create and modify plies in the laminate. You can also postprocess composite laminate results using Femap’s global composite ply feature, which allows you to view results on continuous plies through the structural model.

Page

Femap is solver-neutral and provides in-depth pre- and postprocessing support for all of the main commercial solvers on the market, including NX Nastran, Ansys, LS-DYNA, Abaqus and TMG. You can take full advantage of the advanced analysis capabilities of these solvers using

18

Solver Neutral

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Femap’s comprehensive modeling and analysis support, particularly for dynamic, geometric and material nonlinear, heat transfer and fluid flow analyses. Postprocessing A wealth of visualization capabilities help you view and interpret the results to quickly understand the model behavior. You’ll find everything you need to view and interpret the output data, including: 

Contour and criteria plots



Deformed shape animations



Dynamic cutting plane and iso-surfaces



Full output selection



XY plots



Free body diagrams and grid point force balance output



Time and frequency domain animations

Complete access to results data is provided through the Data Table pane, which you can use to gather, sort and control the amount and type of data that is visible, to compile an analysis report. Scalable Simulation Solutions The Velocity Series CAE products offer scalable solutions for design engineers in the form of the CAD-embedded Solid Edge Simulation program, and Femap with NX Nastran for CAE analysts. The Femap with NX Nastran product line itself offers solution scalability, from the more general simulation capabilities available in the base module to more advanced applications including dynamics, optimization, advanced nonlinear, rotor dynamics, heat transfer and fluid flow in add-on modules. Customization Femap’s open customization capability allows complete access to all Femap functions through an OLE/COM object-oriented Application Programming Interface (API), which employs standard, non-proprietary programming languages. Access to the API is through a development environment within the user interface where you can create custom programs that automate workflows and processes, and which can interact and exchange data with third-party programs such as Microsoft Word and Excel.

Page

Femap is an intuitive Windows-native application. Femap’s support of multiple graphics windows and specialized panes, such as the Model Info Tree and Data Table, allow complete access to the finite element model and results data and help promote efficient work flows. You can modify the appearance of the interface to suit your requirements, including repositioning panes, modifying the level of functionality exposed, and complete toolbar and icon customization.

19

Usability

PART 3: ANALYSIS

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Exercise 11: Find out the total axial deflection and reaction force at the fixed end of an axial member of cross section 100x100mm and 1000mm long subjected to an axial load of 1000N at the free end. The axial member is made of 4340 steel.

Exercise 12:

Page

21

Find the maximum deflection of a cantilever beam having a length of 1m and cross section of 200 x 100 mm (where, 200mm is height). The load applied is 10 kN. E = 210 GPa.

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Exercise 13: Find maximum deflection of a simply supported beam having a length of 1m and cross section of 200 x 100 mm and 200mm is mean height. A centralized load of 10kN is applied. E= 210 GPa for steel.

Exercise 14:

Page

22

Find the deflection of each joint and reaction forces at the fixed ends under loading as shown in fig. Cross sectional area is 5000mm2, E= 13GPa.

CAD Analysis Lab Manual

S6 Mechanical

DEPT OF MECHANICAL - STIST

Exercise 15: Determine the nodal deflection, reaction forces and maximum stress acting on a truss as in figure. E=200Gpa, A=3500 mm 2.

Exercise 16:

Page

23

Determine the nodal deflection, reaction forces and maximum stress acting on a truss as shown in the figure. E = 200 Gpa, A = 3500 mm2.