CALCULATION OF MECHANICAL BEHAVIORS OF SHAPE-MEMORY ALLOY UNDER MULTIAXIAL LOADING CONDITIONS

In this paper, for the calculation of the deformation behaviors of sha pe-memory alloy under multi-axial loading conditions with temperature changes, a two-dimensional mechanical model of polycrystalline shape m emory alloy is constructed on the bases of the crystal plasticity and the deformation mechanism of shape memory alloy. In such a model, the orientation of crystal grain in the polycrystal and the loading direct ion can be considered. The deformation behaviors under some complex lo ading conditions are calculated with the model, and the results show t hat they are in good qualitative agreement with the experimental resul ts. (C) 1997 Published by Elsevier Science Ltd.