A THREE-DIMENSIONAL CONSTITUTIVE MODEL FOR TRANSFORMATION INDUCED PLASTICITY IN SHAPE MEMORY ALLOYS

Vanderson Marcio Dornelas¹; Marcelo Amorim Savi¹; Sergio de Almeida Oliveira²; Pedro Manuel Calas Lopes Pacheco²; Alberto Paiva³

¹ Universidade Federal do Rio de Janeiro; ² CEFET/RJ - Centro Federal de Educação Tecnológica Celso Suckow da Fonseca; ³ Universidade Federal Fluminense/ Escola de Engenharia Industrial e Metalúrgica de Volta Redonda

doi:10.20906/CPS/CON-2016-0303

Resumo

Transformation induced plasticity is defined as the plastic flow arising from solid state phase transformation processes involving volume and/or shape changes without overlapping the yield surface. This phenomenon occurs in the shape memory alloys (SMAs) having significant influence over their macroscopic thermomechanical behavior. The present contribution presents a macroscopic three-dimensional constitutive model with internal constraints to describe the thermomechanical behavior of SMAs including plasticity and transformation induced. Comparisons between numerical and experimental results attest the model's ability to capture TRIP phenomenon.

Palavras-chave: Shape memory alloys; Plasticity; Transformation induced plasticity; Phase transformations; Constitutive model; Numerical simulations