One-dimensional constitutive model of stress-induced transitions between Ms and Mf in shape memory alloys

Yun Luo, Takeshi Okuyama, Toshiyuki Takagi

Research output: Contribution to journalConference article

Abstract

The mechanical constitutive relation of Shape Memory Alloy (SMA) materials during stress-induced transitions is discussed based on mixture theories. The twinned martensite variants and austenite parents are taken as two constituents with their own conversion or transition behavior when subjected to external loading. Corresponding internal variables for describing these transitions are newly defined. This model enables the numerical prediction of the overall mechanical behavior of SMA materials in the temperature range form Ms to Mf. Typical approaches of mixture theories; parallel and series models are applied in the formulation of the constitutive behavior of SMAs with the corresponding isostrain and isostress conditions. Tensile tests have been carried out with Ti-Ni specimens in a temperature range including martensitic transition temperatures. Numerical simulation based on the proposed model accurately predicted the mechanical behavior of stress-induced transitions in the concerned temperature range.

Original languageEnglish
Pages (from-to)335-342
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4699
DOIs
Publication statusPublished - 2002
EventSmart Structures and Materials: Active Materials: Behavior and Mechanics - San Diego, CA, United States
Duration: 2002 Mar 182002 Mar 21

Keywords

  • Constitutive relations
  • Martensitic transitions
  • Mixture theories
  • Modeling
  • Shape memory alloys

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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