セラミックス-金属接合材の応力集中緩和法 : 三次元接合体に対する接合端部の幾何形状効果に関する考察

概要

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In the present paper, the stress distribution around the apex of dissimilar materials for two-and three-dimensions is calculated using an improved boundary element method (BEM) , and the order of the singularity for the stress distribution is obtained from the numerical results. It is shown that the numerical solution is very accurate even at the internal points near the boundary or apex. For the sample structure bonded with ceramics (Al_2O_3) and Cu, it is proven that the order of the stress singularity obtained in this way is in good agreement with that of Bogy's theory. For three-dimensional bonded structure, it is found that the stress singularity is very strong around the apex. This indicates that the possibility of crack generation in this part is very high. Through detailed investigation of the stress field, a simple method to moderate the stress concentration is suggested.
一般社団法人日本機械学会の論文
1992-08-25