傾斜機能材料をインサート材とする複合円筒の熱応力解析

概要

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Ceramics are expected to be widely applied as structural materials due to their excellent mechanical and thermal properties such as high-temperature strength, wear resistance and low expansion. In actual fact, ceramics should always be used in combination with metals because of two serious defects of ceramics, i.e., brittleness and hard formability, which are fatal as structural components. One of the key points in joining ceramics to metals is to construct an appropriate interlayer for reducing thermal stresses originating from thermal expansion mismatch between a ceramic and a metal. In this paper, we present an analytical solution for the thermal stress problem in a ceramic/metal composite hollow circular cylinder with an interlayer of Functionally Gradient Material (FGM) subjected to unaxisymmetric heating. The solution is expressed using the thermoelastic theory for the nonhomogeneous multiply connected regions formulated in terms of the stress function by one of the present authors. From the results of numerical calculation, we discuss the effects of the thickness and the composition distribution of the FGM interlayer on the magnitude of thermal stress.
一般社団法人日本機械学会の論文
1992-09-25