An explicit, straightforward approach to modeling SMA pseudoelastic hysteresis

Toward a straightforward approach to modeling SMA pseudoelastic behavior, a new finite image-flow elastoplastic model with nonlinear combined hardening is proposed by coupling the size change of the yield surface with the moving of the yield surface center. A departure from usual approaches is that any given shapes of hysteresis loops may be automatically generated via explicit procedures in the framework of classical image elastoplasticity with no reference to any phase variables. Numerical examples are presented to show good accord with test data for Ti–Ni alloys.