縁き裂の応力拡大係数に及ぼす円形介在物の干渉効果の近似解法

概要

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In design of machines, it is often important to know the state of stress around crack and to obtain the stress intensity factors (SIF) for many crack problems. And there are a lot of results by means of many analytical or numerical analyses of them. But it is difficult to analyze the general crack problems.Then in this paper, tension problems of a edge crack in a semi-infinite plate having two circular inclusions symmetrically are treated by a method of approximate analysis. The analysis is fundamentally based on the principle of superposition, and the boundary conditions of crack surfaces are satisfied, but the conditions of circular inclusions are imperfect. According to the results of calculations, the stress intensity factors are shown to be in good agreement with the known solutions and are changing due to the configuration parameter of edge crack and circular inclusions or due to the ratio of elastic modulus of circular inclusion to matrix.
2012-02-01