ANALYSIS OF TRIGGER LINE MODELS FOR SHAPE-MEMORY HYSTERESIS BASED ON DYNAMIC TESTING

Trigger line models for the behaviour within the pseudoelastic hystere sis of shape memory alloys are considered in the analysis of the dynam ic response of a cantilevered beam constrained by shape memory wires. Quantitative results of damping and shift in natural frequencies of th e structure are presented. The results are compared to theoretical pre dictions of the effect of inner hysteresis loops on structural dynamic s. The comparison suggests that there may be two trigger lines, one fo r loading and one for unloading, within the hysteresis loop.