Improvement of stress intensity factors computed from path‐independent integrals by Richardson's extrapolation

Abstract

SUMMARYA new method for improving the approximations of stress intensity factors computed from pathindependent integrals is developed. The method uses Richardson's extrapolation. Numerical results are given to show the eciency and the stability of the present method. # 1998 John Wiley & Sons, Ltd.KEY WORDS stress intensity factors (SIF); ®nite element method (FEM); reciprocal work contour integral (RWCI); path-independent integrals (PII); displacement correlation technique (DCT); quarter-point displacement technique (QPDT)