Finite element analysis of a superelastic shape memory alloy considering the effect of plasticity
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Xidian University, Key Laboratory of Electronic Equipment Structural Design, Xi’an; State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian; State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an
Xi’an Jiaotong University, State Key Laboratory for Manufacturing System, Xi’an
Submission date: 2016-08-04
Acceptance date: 2017-06-24
Online publication date: 2017-10-15
Publication date: 2017-10-15
Journal of Theoretical and Applied Mechanics 2017;55(4):1355-1368
In the present study, a shape memory alloy (SMA) phenomenological constitutive model is proposed that is capable of describing SMA superelastic behavior and the plasticity effect. The phase transformation constitutive model, by using strain and temperature as control variables to judge the phase transformation points in order to avoid the complexity of trans- formation correction, incorporates plasticity described by the von Mises isotropic hardening model. Further, the proposed model is implemented into the finite element package ANSYS by the user subroutine USERMAT. The results produced by the proposed model of simu- lated superelastic and plasticity behavior are compared with experimental data taken from the literature.
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