Abstract
A new method is presented for stress intensity factor analyses of two-dimensional crack problems including bimaterial interface crack problems. The M 1-integral method, an extended version of the J-integral method, is applied to bimaterial interface crack problems, using the results obtained from the boundary element method. The accuracy of the results of internal points is improved using adaptive automatic integration for a singular boundary integral. The value of the J-integral or the M 1-integral is also obtained by this automatic integration. The J-integral method is applied to a center-cracked homogeneous plate under tension. Furthermore, a bimaterial plate with an edge interface crack and a bimaterial plate with a center slant interface crack subjected to tension are analyzed. The proposed method gives accurate stress intensity factors not only for a crack in a homogeneous material but also for an interface crack between dissimilar materials.
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