Abstract
Overall thermomechanical behavior of the polycrystalline shape memory alloys is described from the micromechanical point of view by modeling the alloys as a matrix-inclusions material system. The martensite inclusions are assumed to be born in the austenite matrix at the moment when a transformation condition is satisfied there during thermomechanical loading. The macroscopic constitutive equation is derived in rate form by means of Eshelby's inhomogeneous theory. The Mori-Tanaka theory is employed to take into account the interaction of the martensite inclusions. The formula of the overall thermomechanical material parameters, which exhibits the effect of transformation, is derived explicitly.
