EXPERIMENTAL STUDY ON PERFORMANCES IN Cu-BASED SHAPE MEMORY ALLOY UNDER MULTI-AXIAL LOADING CONDITIONS

抄録

This paper reports several interesting features in the shape memory alloy observed experimentally under multi-axial complex loading conditions including some temperature changes (the general loading condition). The experiments were performed systematically by applying the combined loads of axial force and torque to thin-walled tubular specimen made of a Cu-based polycrystalline shape memory alloy. In these systematic experiments, the strong path dependency of pseudo-elastic phenomenon was observed, and moreover this dependency was disappeared completely only when the materirals went back to the stress free state. This kind of unique behaviour of shape memory alloy may be quite interesting from a view point of new engineering applications of shape memory alloy.