Continuum modeling of shape-memory alloys

Rohan Abeyaratne, Sang Joo Kim, James K. Knowles

Research output: Contribution to journalConference articlepeer-review

18 Scopus citations


The hysteretic behavior of a thermoelastic bar that is contained in a constant temperature environment and which is subjected to a prescribed elongation-history is presented. The physically-based constitutive model utilized is based on `classical' continuum thermodynamics: it consists of a two-well Helmholtz free-energy potential that describes the thermoelastic behavior of each phase, a kinetic law based thermal-activation theory which controls the rate of phase transition, and a nucleation criterion based on a critical value of driving force that signals the initiation of the transformation. The associated stress-elongation response of a tensile specimen composed of such a material is calculated and a qualitative comparisons with experiments is made.

Original languageEnglish
Pages (from-to)59-69
Number of pages11
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
StatePublished - 1994
EventProceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA
Duration: 6 Nov 199411 Nov 1994


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