傾斜機能積層板の非弾性熱応力緩和に関する微視力学的解析 : 組成傾斜分布と積層数の影響

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In this paper, transient thermal stresses in an Al_2O_3-Ni functionally graded material (FGM) plate subjected to through-thickness heat flow have been numerically analyzed under three different mechanical boundary conditions by taking account of time dependent inelastic deformation due to interfacial diffusion between ceramic and metal phases as well as creep of both phases. First, an outline of the analytical method, which consists of micromechanical and macromechanical approaches, is briefly represented. The micromechanical approach stems from Eshelby's equivalent inclusion method and Mori-Tanaka's mean-field approximation, and the macromechanical one is based on the classical laminated plate theory. Second, we have systematically examined the effects of graded compositional distributions and the number of layers on the thermal stresses in the FGM plate in detail.
2001-10-25