Modeling of Transformation-Induced Plasticity in SMAs

Abstract

Many engineering applications of shape memory alloys require material that exhibits a repeatable thermomechanical response, and Chapters 1 and 2 discussed the stabilization of material through training. Chapters 3 and 4 addressed the derivation and implementation of models designed to simulate such stable behavior. However, the ability to account for evolving material behavior caused by induced plastic strains during transformation is also impor- tant. Here, we focus on the development of a 3-D constitutive model for SMAs that continue to exhibit substantial cyclic evolution of irrecoverable strains. A 1-D reduction of the model and comparison with experimental results is also presented.