Improvement of extrapolation method on stress intensity factor
Fujisaki Wataru; Tanaka Satoshi; Inoue Shigefumi
Abstract:In this study, errors of stress intensity factor KI by stress extrapolation method, displacement extrapolation method and hybrid extrapolation method were investigated on a crack in infinite plate problem. It is found that the errors of stress and strain near crack tip are almost expressed as a simple equation, and we propose the modified distance extrapolation method which assures the high accuracy of KI by finite element analysis. The usefulness of this method is shown by the results of KI calculation on two- and three-dimensional crack problems. Key Words:stress intensity factor, stress extrapolation method, displacement extrapolation method, hybrid extrapolation method, modified distance extrapolation method