Multivariant micromechanical model for SMAs. Part 2. Polycrystal model

Miinshiou Huang, Xiujie Gao, L Catherine Brinson

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

An averaging scheme is developed to simulate the behavior of a polycrystalline shape memory alloy (SMA) specimen using the Multivariant Micromechanics approach. An untextured polycrystalline specimen is assumed to be formed by a number of randomly oriented single crystal grains. The previously developed Multivariant technique is used to model the response of each single crystal grain subjected to its stress field seen in the polycrystalline sample. Using spherical grains, the Eshelby-Kroner approach is used to formulate the interaction between grains and to determine the stress state in each individual grain. This model successfully captures the basic features of SMA polycrystalline response to loading and temperature. In addition, comparison is made to recent experimental data with fully triaxial load states. Reasonable qualitative agreement is obtained and some issues related to crystallography of the material model are addressed.

Original languageEnglish (US)
Pages (from-to)1371-1390
Number of pages20
JournalInternational Journal of Plasticity
Volume16
Issue number10
DOIs
StatePublished - Jan 1 2000

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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