Hisaaki Tobushi

TL;DR: In this paper, the thermomechanical properties of a thin film of shape memory polymer of polyurethane series were investigated experimentally, based on the experimental results, the dynamic mechanical properties, cyclic deformation properties at high temperature, thermal cycling properties, creep and stress relaxation are discussed.

TL;DR: A nonlinear thermomechanical constitutive model of shape memory polymer (SMP) is developed by modifying a linear model that expresses well the thermomechamical properties of polyurethane-shape memory polymer, such as shape fixity, shape recovery and recovery stress.

TL;DR: In this article, a thermomechanical constitutive model was developed by modifying a standard linear viscoelastic model for shape memory polymer of polyurethane series, in order to describe the thermodynamic properties of shape memory.

TL;DR: In this article, the influence of strain rate on the superelastic properties of TiNi shape memory alloy was investigated and it was shown that the martensitic transformation stress and the dissipated work increased with an increase in strain rate.

TL;DR: In this article, a theoretical framework for the cyclic uniaxial deformation in shape memory alloys subjected to the thermal and/or mechanical loads by introducing three internal variables; the local residual stress and strain and the volume fraction of the martensic phase accumulated during cyclic forward and reverse martensitic transformations is discussed.