Author(s)

S.Kamiya, T. Yamauchi, M. Saka & H. Abe

Abstract

An elementary discussion is presented about the development of microcracks and resulting macroscopic crack extension behavior in brittle polycrystalline materials in connection with three dimensional distribution of intrinsic thermal stress. A simple model was prepared on the basis of finite element method for the evaluation of grain by grain stress distribution. It was revealed that polycrystalline materials have characteristic three dimensional distribution of intrinsic stress, and the macroscopic crack extension resistance would be controlled by resulting three dimensional structures of damage which might be missed by two dimensional analysis. As an exam

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