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Understanding Non-linear Finite Element Analysis Through Illustrative Benchmarks

The use of Finite Element software has become very widespread in engineering and its range of applicable has greatly increased. Indeed, it is nowadays difficult to find many engineering applications for which the FE method has not been used or at least attempted. With this rapid increase in the use of the FE method, it’s increasingly automated procedures, and its user-friendly graphical interfaces, the expectations of FE users have risen, sometimes unrealistically. Inexperienced FE users may be under the impression that they can easily tackle non-linear problems without having to gain a good understanding of the background theory.

NAFEMS has published many benchmarks on non-linear problems, usually devised to address a particular type of non-linearity, such as plasticity, geometric non-linearity, etc. Non-linear FE theory has been included in many FE textbooks. This book is written to fill the gap between the benchmark reports and the textbooks of FE theory, by presenting a carefully selected set of non-linear benchmarks and providing a brief coverage of the background non-linear theory covered in the benchmarks.

Contents

CHAPTER 1 – INTRODUCTION

  • SCOPE AND LAYOUT OF THE BOOK
  • CLASSIFICATION OF NON-LINEARITIES
  • NON-LINEAR FE PROCEDURES


CHAPTER 2 – PLASTICITY (TIME-INDEPENDENT MATERIAL NON-LINEARITY)

  • INTRODUCTION
  • STRESS-STRAIN RELATIONSHIPS
  • REVIEW OF ELASTO-PLASTICITY THEORY
  • FUNDAMENTAL 2D PLASTICITY BENCHMARK
  • 3D PLASTICITY BENCHMARK
  • KINEMATIC HARDENING BENCHMARK
  • PRESSURISED CYLINDER PLASTICITY BENCHMARK
  • CYCLIC PLASTICITY BENCHMARK
  • RIGID PUNCH PLASTICITY BENCHMARK

CHAPTER 3 – CREEP (TIME-INDEPENDENT MATERIAL NON-LINEARITY)

  • INTRODUCTION
  • REVIEW OF CREEP THEORY
  • CONSTANT-LOAD CREEP BENCHMARKS
  • STRESS RELAXATION CREEP BENCHMARKS
  • VARIABLE-LOAD CREEP BENCHMARKS
  • PRESSURISED CYLINDER CREEP BENCHMARK
  • TORSIONAL CREEP BENCHMARKS
  • THERMALLY-INDUCED CREEP BENCHMARK

CHAPTER 4 – GEOMETRIC NON-LINEARITY

  • INTRODUCTION
  • REVIEW OF GEOMATRIC NON-LINEARITY THEORY
  • SNAP-THROUGH GNL BENCHMARK
  • BIFURCATION BENCHMARK
  • SNAP-BACK BENCHMARK
  • RIGID-BODY ROTATION BENCHMARK
  • STRAIGHT CANTILEVER BENCHMARK
  • CURVED CANTILEVER BENCHMARK
  • Z-SHAPED 3D CANTILEVER BENCHMARK
  • TORSIONAL BUCKLING 3D BENCHMARK
  • PIPE COLLAPSE BENCHMARK
  • STIFFENED CYLINDRICAL PANEL BENCHMARK

CHAPTER 5 – PRACTICAL GUIDELINES

  • QUESTIONS TO BE ADDRESSED BY THE USER
  • DIFFICULTIES ASSOCIATED WITH NON-LINEAR PROBLEMS
  • NON-LINEAR BENCHMARKS

REFERENCES

GLOSSARY


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About

A.A. Becker

First Published - August 2001

Hardback, 171 Pages