Boundary element method based computation of stress intensity factor by modified crack closure integral

摘要

The local smoothing scheme in conjunction with the modified crack closure integral technique has been adopted in the boundary element method to improve the accuracy of computed stress intensity factors. Simple re- lations have been derived for the case of linear, quadratic and quarter point elements around the crack tip. Case studies are presented to demonstrate improvement in the accuracy. While the displacement method gives a differ- ence with the standard handbook solution up to 26/100, the suggested method helps to reduce it to within 2/100.