关键词: 固体, 膨胀系数, 相间结合状态

Abstract: This paper has the background of composite materials. It approaches the theory of the equivalence coefficients of thermal expansion in multiphase solids, proposes using three parameters to describe the effect of the conjunction states between phases in the coefficients and emphasizes the difference of the coefficients in stress boundary value problem from that in displacement boundary value problem. The conclusions obtained would obviously have rationality and utility for both fiber and particle reinforced composite materials.

Key words: solid, expansion coefficient, conjunction state