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Three Dimensional Test Cases In Linear Elastic Fracture Mechanics



A series of well defined test cases have been carried out for the NAFEMS Fracture Mechanics Working Group to provide checks on the ability of finite element programs to produce accurate solutions to specific three-dimensional fracture problems. Both the ABAQUS and BERSAFE finite element codes were used for this work.

Linear elastic analyses of a centre-cracked plate under tension were carried out to quantitatively evaluate mesh convergence requirements and various methods of parameter evaluation. The methods developed in this part of the work were then applied to curved crack geometries, which included embedded and surface cracks in plates and cylinders.

Details of the test cases considered and the results are presented in this report.


Contents

INTRODUCTION

  • Background
  • Test cases
  • Finite Element codes
  • Target solutions
  • Parameter evaluation methods
  • Report format

CENTRE CRACKED PLATE

  • Test case
  • Mesh convergence
  • Crack tip
  • Mesh type
  • Mesh thickness
  • Varied load types
  • Parameter study

EMBEDDED PENNY CRACK

  • Test case
  • Uniform tension

SURFACE CRACKED PLATE

  • Test case
  • Uniform tension
  • Bending

SURFACE CRACKED CYCLINDER

  • Test case
  • Internal pressure
  • Spinning

References

Appendix A



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About

R.C.B. Judge & B.J. Marsden

First Published - March 1993

Softback, 124 Pages