Analysis of the Deformation and Recovery Behavior of Shape Memory Polymer
Charoen Chinwanitcharoen, Toshiro Yamada, Moritaka Fukunaga, Susumu Takashima
Dept. of Chemical & Chem. Eng., Kanazawa University
Japan

Keywords: shape memory polymer, finite element, volumetric compression

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The compressive deformation and recovery behaviors of shape memory polymer were investigated numerically. The double layer model, which composed of nonlinear elastic elements, was proposed to describe the deformation behaviors of a shape memory polymer, especially in the shape recovery process. The proposed double layers model based on Ogden constitutive equations was calculated in plane stress analysis using finite element method (FEM). In this study, the authors examined the compressive deformation and recovery behaviors for compression rates of 10, 50, 65, and 80% of shape memory polymer foam with the change in volumetric compression. From the calculated results, the recovery behavior considerably changes between compression rates of 65 and 80%. Exceeding compression rate of 65%, a property of incompressibility has a large effect on the recovery behavior, possibly since the object was compressed over the volumetric compression region.