形状記憶ポリマーのサーモメカニカル構成モデル(<小特集>:非弾性挙動の力学)

抄録

A nonlinear thermomechanical constitutive model of shape memory polymer is developed by modifying a linear model. Coefficients in the model are expressed by a single exponential function of temperature in order to describe the variation in mechanical properties due to the glass transition. The proposed theory expreses well the thermomechanical properties of polyurethane-shape memory polymer, such as shape fixity, shape recovery and recovery stress. The proposed model is useful for design of shape-memory polymer elements.