composites

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Analysis of Composite Materials with Abaqus

R 6.12

About this Course Course objectives

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Upon completion of this course you will be able to: Define anisotropic elasticity with Hookean models for combining the fiber-matrix response Define composite layups using Abaqus/CAE Model sandwich composite structures and stiffened composite panels Model progressive damage and failure in composites Model delamination and low-cycle fatigue of composite structures

Targeted audience Simulation Analysts

Prerequisites This course is recommended for engineers with experience using Abaqus/Standard

3 days

Day 1 Lecture 1

Introduction

Lecture 2

Macroscopic Modeling

Lecture 3

Mixed Modeling

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Workshop 1 Lecture 4

The Pagano Plate Problem Composite Modeling with Abaqus

Workshop 2a Buckling of a Laminate Panel Workshop 2b Composite Wing Section Workshop 3

Composite Yacht Hull (Optional)

Day 2 Lecture 5

Reinforcement Modeling

Lecture 6

Modeling of Sandwich Composites

Workshop 4

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Lecture 7 Workshop 5 Lecture 8

Bending of a Sandwich Beam Modeling of Stiffened Panels Bending of a Reinforced Flat Panel under Uniform Pressure Modeling Damage and Failure in Composites

Day 3 Lecture 9

Workshop 6

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Lecture 10

Cohesive Behavior

Analysis of a DCB using Cohesive Behavior Virtual Crack Closure Technique (VCCT)

Workshop 7

Analysis of a DCB using VCCT (Abaqus/Standard)

Workshop 8

Analysis of a DCB using VCCT (Abaqus/Explicit)

Lecture 11 Workshop 9

Low-cycle Fatigue Fatigue Crack Growth in a DCB Specimen

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Additional Material Appendix 1

Crack Propagation Analysis using the Debond Capability

Appendix 2

Cohesive Element Modeling Techniques

Appendix 3

Modeling Issues for Continuum Shell Elements

Appendix 4

Alternative Modeling Techniques for Composites

Appendix 5

Modeling Composite Material Impact with Abaqus/Explicit

Workshop 10 Perforation of a Composite Plate Appendix 6

Material Orientation Examples

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Legal Notices The Abaqus Software described in this documentation is available only under license from Dassault Systèmes and its subsidiary and may be used or reproduced only in accordance with the terms of such license. This documentation and the software described in this documentation are subject to change without prior notice. Dassault Systèmes and its subsidiaries shall not be responsible for the consequences of any errors or omissions that may appear in this documentation. No part of this documentation may be reproduced or distributed in any form without prior written permission of Dassault Systèmes or its subsidiary. © Dassault Systèmes, 2012. Printed in the United States of America Abaqus, the 3DS logo, SIMULIA and CATIA are trademarks or registered trademarks of Dassault Systèmes or its subsidiaries in the US and/or other countries. Other company, product, and service names may be trademarks or service marks of their respective owners. For additional information concerning trademarks, copyrights, and licenses, see the Legal Notices in the Abaqus 6.12 Release Notes and the notices at: http://www.3ds.com/products/simulia/portfolio/product-os-commercial-programs.

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Revision Status

Lecture 1

5/12

Updated for 6.12

Workshop 1

5/12

Updated for 6.12

Lecture 2

5/12

Updated for 6.12

Workshop 2a

5/12

Updated for 6.12

Lecture 3

5/12

Updated for 6.12

Workshop 2b

5/12

Updated for 6.12

Lecture 4

5/12

Updated for 6.12

Workshop 3

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Lecture 5

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Workshop 4

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Lecture 6

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Workshop 5

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Lecture 7

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Workshop 6

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Lecture 8

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Workshop 7

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Lecture 9

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Workshop 8

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Lecture 10

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Workshop 9

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Lecture 11

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Workshop 10

5/12

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Appendix 1

5/12

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Appendix 2

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Appendix 3

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Appendix 4

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Updated for 6.12

Appendix 5

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Updated for 6.12

Appendix 6

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Updated for 6.12

Lesson 1: Introduction Lesson content:

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Description of a Composite Typical Applications of Composites Some Typical Composites Finite Element Modeling of Composites

20 minutes

L1.1

Lesson 2: Macroscopic Modeling

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Lesson content:

Introduction Anisotropic Elasticity Viscoelasticity Thermal Expansion Material Orientation

45 minutes

L2.1

Lesson 3: Mixed Modeling

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Lesson content:

Introduction Laminated Composite Shells Continuum Shell Elements Continuum Shell Meshing Continuum Solid Elements Symmetry Conditions and Laminated Structures Workshop Preliminaries Workshop 1: The Pagano Plate Problem

3 hours

L3.1

Lesson 4: Composite Modeling with Abaqus

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Lesson content:

Introduction Understanding Composite Layups Understanding Composite Layup Orientations Defining Composite Layup Output Viewing a Composite Layup Abaqus/CAE Demonstration: Three-ply composite Composites Modeler for Abaqus/CAWorkshop 2a: Buckling of a Laminate Panel Workshop 2b: Composite Wing Section Workshop 3: Composite Yacht Hull

3 hours

L4.1

Lesson 5: Reinforcement Modeling Lesson content:

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Introduction Rebar Layers Embedded Elements

45 minutes

L5.1

Lesson 6: Analysis of Sandwich Composites

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Lesson content:

Introduction to Sandwich Composites Abaqus Usage Modeling Skins with Abaqus/CAE Abaqus Examples Comparison to NAFEMS solution Comparison of Conventional and Continuum Shells Stacking Elements Through the Thickness Tapered Sandwich Composite Workshop 4: Bending of a Sandwich Beam

90 minutes

L6.1

Lesson 7: Analysis of Stiffened Composite Panels Lesson content:

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Stiffened Composite Panels Abaqus Usage Abaqus Example Workshop 5: Bending of a Reinforced Flat Panel under Uniform Pressure

2 hours

L7.1

Lesson 8: Modeling Damage and Failure in Composites

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Lesson content:

Failure Criteria in Laminates Failure Theories Progressive Damage of Fiber-Reinforced Composites Example Import of Composite Damage Model

75 minutes

L8.1

Lesson 9: Cohesive Behavior

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Lesson content:

Introduction Cohesive Element Technology Constitutive Response in Cohesive Elements Viscous Regularization for Cohesive Elements Cohesive Element Examples Surface-based Cohesive Behavior Element- vs. Surface-based Cohesive Behavior Workshop 6: Analysis of a DCB using Cohesive Behavior

Note: Appendix 2 contains an in-depth discussion of modeling techniques for cohesive elements using both the interactive and keywords interfaces.

3 hours

L9.1

Lesson 10: Virtual Crack Closure Technique (VCCT)

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Lesson content:

Introduction VCCT Criterion LEFM Example using Abaqus/Standard LEFM Example using Abaqus/Explicit Output Ductile Fracture with VCCT VCCT Plug-in Comparison with Cohesive Behavior Examples Workshop 7: Analysis of a DCB using VCCT (Abaqus/Standard) Workshop 8: Analysis of a DCB using VCCT (Abaqus/Explicit)

3 hours

L10.1

Lesson 11: Low-cycle Fatigue Criterion Lesson content:

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Introduction Direct Cyclic Low-cycle Fatigue Analysis Low-cycle Fatigue Criterion Workshop 9: Fatigue Crack Growth in a DCB Specimen

1 hour

L11.1

Appendix 1: Crack Propagation Analysis using the Debond Capability Lesson content:

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Introduction Modeling Interface Behavior

30 minutes

A1.1

Appendix 2: Cohesive Element Modeling Techniques Lesson content:

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Viscous Regularization Modeling Techniques

60 minutes

A2.1

Appendix 3: Modeling Issues for Continuum Shell Elements Lesson content:

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Defining the thickness direction for continuum shell elements Shell thickness Change in thickness and thickness modulus

60 minutes

A3.1

Appendix 4: Alternative Modeling Techniques for Composites Lesson content:

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Introduction Laminated Shell Section Definition Laminated Solid Section Definition Section Point Based Postprocessing Technique

60 minutes

A4.1

Appendix 5: Modeling Composite Material Impact with Abaqus/Explicit

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Lesson content:

Introduction Composite Damage Models in Abaqus/Explicit Unidirectional Fiber Example – Composite Plate Impact Woven Fabric Example – Corrugated Beam Crushing Modeling Techniques Workshop 10: Perforation of a Composite Plate

90 minutes

A5.1

Appendix 6: Material Orientation Examples Lesson content:

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Example 3: Shell elements Example 4: Layered shell elements Example 5: Solid elements Example 6: Layered solid elements

30 minutes

A6.1