417 マイクロメカニックスによる SMP 繊維含有インテリジェントマテリアルの剛性解析

概要

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A shape memory polymer (SMP) of polyurethane series can be designed for its glass-transition temperature T_g, beyond which a remarkable change in stiffness may occur, with in the range from -30℃ to 70℃. A material containing such SMP fibers may hence be also designed for its macroscopic stiffness by adjusting the type of T_g distribution of fibers. In the present reserch, micromechanical analysis on the macroscopic stiffness of such an intelligent material is performed by taking into cosideration the type of T_g distribution of fibers. Effects of temperature on the macroscopic elastic modulus E^^- and the poisson's ratio v^^- are calculated with respect to various types of T_g distribution of fibers. It can be see from the results that after shape recovery of fibers the value of E^^- increases and the value of v^^- decreases to become below zero.
社団法人日本機械学会の論文
2002-10-10