Numerical analysis of the stress intensity factor for two kinds of mixed-mode crack specimens

Abstract

By means of a boundary element method (BEM), this paper is concerned with two kinds of mixed-mode crack specimens, i.e. the three-point bending and shear specimen with an offset edge crack and the ring specimen with a pair of radial cracks under diametral compression. The boundary element method consists of the constant displacement discontinuity element preented by Crouch and starfield and the crack-tip diplacement discontinuity element proposed by the author. Test examples are included to show that the numerical approach is very efficient and accurate for the stress intensity factor calculation of plane elasticity crack problems in both infinite and finite domains. Specifically, the stress intensity factors (SIFs) for these two kinds of mixed-mode crack specimens are given.

Keywords

stress intensity factor (SIF)mixed-mode crack boundary element method (BEM)displacement discontinuity crack-tip element

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