On thermomechanics and transformation surfaces of polycrystalline NiTi shape memory alloy material

被引：203

作者：

Qidwai, MA ^{[1
]}

Lagoudas, DC ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Aerosp Engn, Ctr Mech Composites, College Stn, TX 77843 USA

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2000年 / 16卷 / 10-11期

关键词：

phase transformation; thermomechanical processes; constitutive behavior; polycrystalline materials; shape memory alloy (SMA);

D O I：

10.1016/S0749-6419(00)00012-7

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A thermomechanical description of the martenstitic phase transformation and the associated shape memory effect in polycrystalline shape memory alloys (SMAs) is presented: The rate-independent constitutive relations are derived in the stress-temperature space using a Lagrangian formulation. The Kuhn-Tucker optimality conditions, constraints on evolution equations for transformations strain and shape of transformation function in thermodynamic force space are obtained naturally through the principle of maximum transformation dissipation. Various transformation functions are investigated and a generalized type transformation function is proposed. Numerical results of the model based on different transformation functions are compared with experimental results to determine their accuracy to predict SMA characteristics like tension compression asymmetry, negative volumetric transformation strain and pressure dependence. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1309 / 1343

页数：35

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