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Constitutive modelling and numerical simulation of multivariant phase transformation in superelastic shape‐memory alloys
Author(s) -
Jung Youngjean,
Papadopoulos Panayiotis,
Ritchie R. O.
Publication year - 2004
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.940
Subject(s) - shape memory alloy , pseudoelasticity , helmholtz free energy , materials science , dissipation , torsion (gastropod) , constitutive equation , computer simulation , mechanics , structural engineering , computer science , mechanical engineering , finite element method , composite material , thermodynamics , engineering , martensite , microstructure , physics , medicine , surgery
This work concerns the micromechanical constitutive modelling, algorithmic implementation and numerical simulation of polycrystalline superelastic alloys under multiaxial loading. The model is formulated in finite deformations and incorporates the effect of texture. The numerical implementation is based on the constrained minimization of the Helmholtz free energy with dissipation. Simulations are conducted for thin tubes of Nitinol under tension–torsion, as well as for a simplified model of a biomedical stent. Copyright © 2004 John Wiley & Sons, Ltd.