金属/セラミックス接合材の破壊・強度の界面破壊力学による評価

概要

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In this study, a method to analyze an interface crack under both residual stresses and applied loadings is proposed, and some BEM analysis results are presented. Fracture toughness tests of metal/ceramics bonded joints with an interface crack are carried out, and the stress intensity factors of these joints are analyzed by BEM. In all tests, the interface crack kinks into the ceramics out of the interface under rather low applied loadings because of the residual stress. The fracture angle and loadings are well predicted based on the interfacial fracture mechanics and the fracture criterion for an interface crack, which was proposed by the authors in a previous paper. The effect of the residual stress on the fracture toughness of metal/ceramics joints are clarified quantitatively. Moreover, a simulation analysis of the fracture path is presented and the results are compared with those of the experiment.
一般社団法人日本機械学会の論文
1994-01-25