Deformation of Shape Memory Alloys Due to Thermo-Induced Transformation

Journal Article

In this paper, a macro-scale, phenomenological constitutive model for shape memory alloys is used in conjunction with energy balance equations to study the evolution of temperature and deformation profiles seen in SMA wires under specific thermal and mechanical boundary conditions. The general, fully coupled thermo-mechanical problem is formulated and analytical solutions are determined for the decoupled case and limit cases. Results for two specific initial/boundarv value problems are presented here: 1) resistive heating of an SMA wire-initial detwinned martensite leads to strain recovery (contraction) on heating; 2) deformation wave in a semiinfinite, initially austenitic SMA wire cooled at the boundary-deformation zone propagates and expands as the wire transforms to martensite (expansion). In both cases, the region and extent of transformation is identified, indicating the magnitude of actuation obtained. Implications of the modeling for the active control of structures are discussed.

Full Text

Duke Authors

Cited Authors

  • Brinson, LC; Bekker, A; Hwang, S

Published Date

  • January 1996

Published In

Volume / Issue

  • 7 / 1

Start / End Page

  • 97 - 107

Published By

Electronic International Standard Serial Number (EISSN)

  • 1530-8138

International Standard Serial Number (ISSN)

  • 1045-389X

Digital Object Identifier (DOI)

  • 10.1177/1045389x9600700111

Language

  • en