Multi-dimensional thermomechanical model for pseudoelastic response of SMA

B. Azadi; R. K. N. D. Rajapakse; D. M. Maijer

doi:10.1117/12.658552

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Abstract

A multi-dimensional thermomechanical model has been developed to simulate the localized phase transformation and propagation of transformation front(s) in SMA materials. The current model is an extension of the one-dimensional model previously developed by the authors which consists of a constitutive relation and a transformation evolution rule (kinetic relation). The constitutive relation is constructed based on continuum mechanics principles, and the kinetic of transformation is expressed in terms of various transformation surfaces in stress-temperature space. The model captures the localized deformations in both forward and reverse transformation. The finite element simulation of the forward and reverse transformations in a short NiTi strip under quasi-static extension is presented.

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B. Azadi, R. K. N. D. Rajapakse, and D. M. Maijer "Multi-dimensional thermomechanical model for pseudoelastic response of SMA", Proc. SPIE 6166, Smart Structures and Materials 2006: Modeling, Signal Processing, and Control, 61660Y (27 March 2006); doi: 10.1117/12.658552; https://doi.org/10.1117/12.658552

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