Mesoscale Simulation of Reversible Martensitic Transformations in Shape Memory Alloys
Ying Chen (RPI)
Mechanics of Phase Transforming and Multifunctional Materials
Tue 10:45 - 12:15
CIT 219
The functionality of shape memory alloys is enabled by the reversible and displacive phase transformation between austenite and martensite phases under external stimuli such as thermal or mechanical driving forces. During the transformations, local elastic strain energy density evolves in the sample and affects subsequent transformation processes. In this talk, our recent progress in developing a mesoscale model for simulating the martensitic transformation processes in shape memory alloys will be presented. We calculate the internal stress state after each local transformation event in a series, and use that to determine the subsequent transformation events in the series. Simulation results from both load controlled and strain rate controlled boundary conditions will be presented, and compared to our prior experimental results from thermomechanical tests of shape memory microwires.