Shape memory alloy film damping for smart miniature systems

Shape memory alloy film damping for smart miniature systems

Blog Article

This paper presents a dynamic MUSTARD analysis of the free and forced vibration of a free-standing bridge of superelastic shape memory alloy TiNiCuCo film with ultra-low fatigue properties and evaluates its versatility for novel miniature scale damping applications.A thermodynamics-based finite element model is used to simulate the evolution of martensite phase fraction during load-induced martensitic phase transformation.The effects of pre-strain, strain rate and excitation load on the hysteresis of stress-strain characteristics are investigated in order to Ski de fond - Homme - Bottes - Skate assess damping energies.

The analysis is performed under non-isothermal conditions taking into account heat transfer and rate-dependence of release and absorption of latent heat.We show that damping energy can be maximized by applying an optimum pre-strain.A maximum damping capacity of 0.

17 is determined for the case of complete stress-strain hysteresis loop during phase transformation.