Explicit Contents Lecture

Abaqus/Explicit: Advanced Topics

2

Day 1 •

Lect Le ctur ure e1

Over Ov ervi view ew of Ab Abaq aqus us/E /Exp xpli lici citt

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Workshop 1

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Lecture 2

Elements

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Lect Le ctur ure e3

Cont Co ntac actt Mo Mode deli ling ng

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Workshop 2

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Lect Le ctur ure e4

Conditional Stability of Abaqus/Explicit

Impact of a Dodge Caravan Bumper Against a Rigid Barrier Quas Qu asii-St Stat atic ic An Anal alys yses es


3

Day 2 •

Lectur Lec ture e5

Adap Ad aptiv tive e Mes Meshin hing g an and d Dis Distor tortio tion n Con Contro troll

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Workshop 3

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Lect Le ctur ure e6

Cons Co nstr trai aint nts s an and d Co Conn nnec ecti tion ons s

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Lectur Lec ture e7

Impac Imp actt and Po Postb stbuck ucklin ling g An Analy alyses ses

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Workshop 4

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Lect Le ctur ure e8

Quasi-static Analysis of a Rubber Bushing

Crushing of a Tube Mate Ma teri rial al Da Dama mage ge an and d Fa Fail ilur ure e


4

Day 3 •

Lect Le ctur ure e9

Mana Ma nagi ging ng La Larg rge e Mo Mode dels ls:: Pa Part rt 1

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Lectur Lec ture e 10

Managi Man aging ng La Large rge Mod Models els:: Par Partt 2

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Lect Le ctur ure e 11

Outp Ou tput ut Fi Filt lter erin ing g

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Lecture Lect ure 12

Importin Impo rting g and Tran Transfer sferring ring Resu Results lts

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Workshop 5

Bird Strike Simulation


5

Additional Material •

Appendix 1

Explicit Dynamics Algorithm

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Appendix 2

Features of General Contact and Contact Pairs

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Appendix 3

Advanced Adaptive Meshing

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Appendix 4

VUMAT

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Appendix 5

Abaqus/Standard to Abaqus/Explicit Co-simulation

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Workshop 6

Beam Impact Co-simulation


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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 t erms 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, 2010. 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 6.10 Release Notes and the notices at: http://www.simulia.com/products/products_legal.html.


7

Revision Status

Lecture 1

6/10

Updated for 6.10

Worksh op 1

6/10

Upd ated fo r 6.10

Lecture 2

6/10

Updated for 6.10

Worksh op 2

6/10

Upd ated fo r 6.10

Lecture 3

6/10

Updated for 6.10

Worksh op 3

6/10

Upd ated fo r 6.10

Lecture 4

6/10

Updated for 6.10

Worksh op 4

6/10

Upd ated fo r 6.10

Lecture 5

6/10

Updated for 6.10

Worksh op 5

6/10

Upd ated fo r 6.10

Lecture 6

6/10

Updated for 6.10

Worksh op 6

6/10

Upd ated fo r 6.10

Lecture 7

6/10

Updated for 6.10

Appen dix 1

6/10

Upd ated fo r 6.10

Lecture 8

6/10

Updated for 6.10

Appen dix 2

6/10

Upd ated fo r 6.10

Lecture 9

6/10

Updated for 6.10

Appen dix 3

6/10

Upd ated fo r 6.10

Lecture 10

6/10

Updated for 6.10

Appen dix 4

6/10

Upd ated fo r 6.10

Lecture 11

6/10

Updated for 6.10

Appen dix 5

6/10

Upd ated fo r 6.10

Lecture 12

6/10

Updated for 6.10


Overview of Abaqus/Explicit Lecture 1

L1.2

Overview of Abaqus/Explicit •

What is Explicit Dynamics?

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Abaqus/Explicit vs. Abaqus/Standard

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Some Challenging Problems

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Defining an Abaqus/Explicit Procedure

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Stable Time Increment

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Bulk Viscosity Damping

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Energy Balance

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Monitoring Diagnostic Messages

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Output


Elements Lecture 2

L2.2

Overview

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Introduction

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Element Types Overview

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Hourglassing and Locking

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Second-order Accuracy


Contact Modeling Lecture 3

L3.2

Overview •

Contact in Abaqus/Explicit

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Defining General Contact

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General Contact Output

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Limitations of General Contact


Quasi-Static Analyses Lecture 4

L4.2

Overview •

Introduction

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Quasi-Static Simulations Using Explicit Dynamics

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Loading Rates

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Energy Balance in Quasi-Static Analyses

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Mass Scaling

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Viscous Pressure

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Summary


Adaptive Meshing and Distortion Control Lecture 5

L5.2

Overview •

Lagrangian and Eulerian Descriptions

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Arbitrary Lagrangian-Eulerian (ALE) Method

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Lagrangian Adaptive Mesh Domains

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Element Distortion Control


Constraints and Connections Lecture 6

L6.2

Overview

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Introduction

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Surface-Based Coupling Constraints

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Connector Elements

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Surface-Based Ties

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Mesh-Independent Fasteners

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Cohesive Connections

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Virtual Crack Closure Technique

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Tips


Impact and Postbuckling Analyses Lecture 7

L7.2

Overview •

Impact Analysis

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Geometric Imperfections for Postbuckling Analyses


Material Damage and Failure Lecture 8

L8.2

Overview •

Progressive Damage and Failure

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Damage Initiation

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Damage Evolution

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Element Removal

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Failure in Fasteners


Managing Large Models: Part 1 Lecture 9

L9.2

Overview •

Introduction

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Simplifying the Model

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Parallel Execution

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Techniques for Reducing CPU Time

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Tips


Managing Large Models: Part 2 Lecture 10

L10.2

Overview •

Submodeling

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Restart

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Parts and Assemblies


Output Filtering Lecture 11

L11.2

Overview •

Introduction

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What is aliasing?

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Preventing aliasing

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Abaqus/Viewer postprocessing filters

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Filter options

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Filter distortions

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References


Importing and Transferring Results Lecture 12

L12.2

Overview •

Introduction

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Import from Abaqus/Explicit to Abaqus/Standard

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Import from Abaqus/Standard to Abaqus/Explicit

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Additional Import Modeling Issues

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Limitations

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Import from Abaqus/Explicit to Abaqus/Explicit

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Demonstration


Explicit Dynamics Algorithm Appendix 1

A1.2

Overview •

Explicit Dynamics Algorithm


Features of General Contact and Contact Pairs Appendix 2

A2.2

Overview •

Features of General Contact

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Contact Pairs


Advanced Adaptive Meshing Appendix 3

LA3.2

Overview •

Eulerian Adaptive Mesh Domains for Steady-State Analyses

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Adaptive Meshing Output and Diagnostics

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Additional Features of Adaptive Meshing


Writing a VUMAT Appendix 4

A4.2

Overview •

Introduction

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Motivation

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Steps Required in Writing a VUMAT

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VUMAT Interface

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Example: VUMAT for Kinematic Hardening Plasticity


Abaqus/Standard to Abaqus/Explicit Co-simulation Appendix 5

A5.2

Overview •

Introduction

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Examples

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Co-simulation modeling

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Postprocessing

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Substructuring

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Technology notes


Explicit Contents Lecture

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