Journal
COMPUTER PHYSICS COMMUNICATIONS
Volume 192, Issue -, Pages 48-53Publisher
ELSEVIER
DOI: 10.1016/j.cpc.2015.02.019
Keywords
Phase-field model; Ginzburg-Landau theory; Nonlinear thermo-elasticity
Funding
- DG NSERC
- Canada Research Chair Programs, Canada
- NSERC
- TUBITAK
- European Research Council through the FP7 Ideas Starting Grant program [307201]
- Conselleria de Educacion e Ordenacion Universitaria (Xunta de Galicia)
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Employing the Ginzburg-Landau phase-field theory, a new coupled dynamic thermo-mechanical 3D model has been proposed for modeling the cubic-to-tetragonal martensitic transformations in shape memory alloy (SMA) nanostructures. The stress-induced phase transformations and thermo-mechanical behavior of nanostructured SMAs have been investigated. The mechanical and thermal hysteresis phenomena, local non-uniform phase transformations and corresponding non-uniform temperatures and deformations' distributions are captured successfully using the developed model. The predicted microstructure evolution qualitatively matches with the experimental observations. The developed coupled dynamic model has provided a better understanding of underlying martensitic transformation mechanisms in SMAs, as well as their effect on the thermo-mechanical behavior of nanostructures. (C) 2015 Elsevier B.V. All rights reserved.
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