セラミックス円環の非定常熱応力

概要

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Structural ceramics are the materials most expected to realize improvements in the efficiency and reliability of heat enigines. This report presents a transient thermal stress analysis of circular ceramic rings, the inner and outer boundaries of which are heated by a hot environment through a given heat transfer. Taking four kinds of ceramics, silicon nitride, silicon carbide, zirconia and alumina, it focuses on how the material charcteristics of those ceramics influences on the thermal stresses which arise in the circular ceramic rings. Since the temperature distribution depends on the thermal conducutivity and stress components, a quantity "αET" (product of thermal expansion coefficient, Youngs modulus and temperature) , the computed results show that the maximum values of thermal stress in the zirconia and alumina rings are considerably higher than the ones in the silicon nitride and silicon carbide rings.
一般社団法人日本機械学会の論文
1988-04-25