境界要素法による界面き裂の応力拡大係数解析 : 第2報, 径路積分法の適用

概要

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This paper presents a new method for stress intensity factor analysis of 2-dimensional crack problems including a mixed-mode interface crack between dissimilar materials. The M_1-integral method, an extended version of the J-integral method, was applied for interface crack problems with the finite-element method by Yau and Wang. In the present paper, the M_1-Integral method is combined with the boundary element method. At first, we improved the accuracy of the results of interior points by using adaptive automatic integration for a singular boundary integral. The value of the J-integral or M_1-integral was also obtained by this automatic integration scheme. We applied the present method to a center-cracked plate under tension. Furthermore, we analyzed a plate with an edge interface crack and a plate with a center slant interface crack between dissimilar materials subjected to tension. It is found from these analyses that the present method gives very accurate results, which are insensitive to the contour integral paths except for the region close to the crack tip.
一般社団法人日本機械学会の論文
1991-12-25