AN OVERVIEW OF THE CONSTITUTIVE MODEL OF SHAPE MEMORY ALLOY AND THEIR APPLICATIONS

Shape Memory Alloy(SMA)is a sort of intelligent material system widely used in many engineering application fields.The basic macroscopic response characteristcs are the pseudoelasticity and the shape memory effect at various temperatures and stress levels.Shape memory alloy constitutive models have developed rapidly and received increasing attention in recent years because of their great potential for the vibration control of engineering structures.Meanwhile,a series of SMA composite contitutive models compatible with the developing composite material become hot topics nowadays and are investigated by many reasearchers.This paper reviews those common SMA constitutive models and newly developed models and classifies them in terms of the mechanical behavior and theoretical basis.And the characteristics and applicability of the models are also compared and analyzed.The developing status of SMA composite constitutive models are introduced from the point of microcosmic and macroscopical view.This paper also presents an overview to the state of the art of some practical SMA constitutive models in the fields of active and passive vibration controls,deformation controls and crack diagnoses and control techniques.Finally,the promising future and engineering applications of SMA constitutive models are discussed.