“…As mentioned earlier, we shall consider two different formulations, one wherein we make constitutive assumptions for the specific Helmholtz potential for the body and the other for the specific Gibbs potential for the body. As mentioned earlier, these two approaches have been used to describe a wide class of responses of bodies, namely the viscoelastic response of fluids and solids [5,36,37], classical plasticity [38,39], single crystal super alloys [40,41], twinning [42][43][44], solid to solid phase transition in metals [44], solidification and melting, crystallization of polymers [45,46], response of shape memory polymers [47,48], and bodies undergoing chemical reactions such as vulcanization of rubber [49].…”