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

摘要： 以复合材料为背景,本文讨论多相固体膨胀系数的等效理论。按照所提出的理论,文章引入了三个参数描写相间结合状态对膨胀系数的影响,并对应力边值和位移边值两类不同的膨胀系数加以严格区别。在纤维和颗粒两类复合材料情况下,所得结果具有明显的理论性和实用性。

关键词: 固体, 膨胀系数, 相间结合状态