On Phase Transformation Models
for Thermo-mechanically Coupled Response of Nitinol
A Sengupta, P. Papadopoulos, A. Kueck and A.R. Pelton
Comp. Mech., 48, pp. 213-227, (2011)
Fully-coupled thermomechanical models for Nitinol at the grain level
are developed in this work to capture the inter-dependence between
deformation and temperature under non-isothermal conditions. The
martensite transformation equations are solved using a novel
algorithm which imposes all relevant constraints on the volume fractions.
The numerical implementation of the resulting models
within the finite element method is effected by the monolithic solution of the
momentum and energy equations. Validation of the models is achieved
by means of thin-tube experiments at different strain rates.
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