異材界面近傍のき裂の特性 : 第1報,弾性解析に基づくき裂先端特異応力場の材料特性依存性の検討

概要

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This paper considers the plane problem of metal/ceramic composite media under external normal loading. One half-plane contains a crack lying parallel to, and at a given distance from the interface. The numerical results of stress intensity factors are obtained and, by applying the maximum cleavage stress criterion at the crack tip, the direction of crack propagation is predicted in various metal/ceramic composites for various distances from the interface. The influences of bimaterial properties and the distances from the interface on the characteristics of the crack are also discussed. A finite element analysis with the automatic crack growth tracking method is also used to describe the kinking behavior of the crack initially parallel to the interface. When the distance of the crack from the interface is small compared to the crack length and to other length scales characterizing the geometry, it is shown that for the sub-interface crack the numerical results are in agreement with the results given by Hutchinson et al.
一般社団法人日本機械学会の論文
1993-04-25