A finite-deformation-based constitutive model for high-temperature shape-memory alloys

Amir Hosein Sakhaei, T Prakash G. Thamburaja

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this work, we develop a coupled thermo-mechanical, isotropic-plasticity, finite-deformation-based constitutive model for high-temperature shape memory alloys (HTSMAs). This constitutive model is capable of describing austenite-martensite phase transformations, rate-dependent plasticity (creep) in the austenitic phase,and also transformation-induced plasticity (TRIP) due to phase transformations between the austenitic and martensitic phase. The constitutive model was also implemented into a commercially-available finite-element program through a user-material subroutine interface. By using suitably valued material parameters in the constitutive model, we show that the output obtained from our finite-element simulations are able to accurately match the experimental strain-temperature cycling data for a ternary high-temperature shape memory alloy (Ti-Ni-Pd) under various applied stresses. We also show through finite-element simulations that for particular boundary-value problems of practical/engineering significance, the usage of a finite-strain-based constitutive theory gives vastly different results when compared to using a small-strain-based constitutive theory.

Original languageEnglish
Pages (from-to)114-134
Number of pages21
JournalMechanics of Materials
Volume109
DOIs
Publication statusPublished - 1 Jun 2017

Fingerprint

heat resistant alloys
shape memory alloys
Constitutive models
Shape memory effect
plastic properties
Plasticity
phase transformations
Phase transitions
subroutines
Temperature
Subroutines
austenite
martensite
Martensite
boundary value problems
Austenite
Boundary value problems
Creep
simulation
engineering

Keywords

  • Constitutive behavior
  • Finite strain
  • Finite-element simulation
  • High temperature shape memory alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Mechanics of Materials

Cite this

A finite-deformation-based constitutive model for high-temperature shape-memory alloys. / Sakhaei, Amir Hosein; G. Thamburaja, T Prakash.

In: Mechanics of Materials, Vol. 109, 01.06.2017, p. 114-134.

Research output: Contribution to journalArticle

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