Numerical study on mechanical response of superelastic NiTi shape memory alloy under various loading conditions

被引：5
作者：
Xiao, Yao [1 ]
Zeng, Pan [1 ]
Lei, Liping [1 ]
机构：
[1] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2017年 / 4卷 / 12期
关键词：
shape memory alloy; phase transformation; micromechanics; CYCLIC THERMOMECHANICAL BEHAVIOR; CONSTITUTIVE MODEL; POLYCRYSTALLINE NITI; PLASTIC-DEFORMATION; MARTENSITIC-TRANSFORMATION; TENSION; STRAIN; REORIENTATION; TEXTURE;
D O I：
10.1088/2053-1591/aa9c06
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, a micromechanical-based constitutive model is proposed for superelastic NiTi shape memory alloy and it is implemented into the finite element software. The thermodynamic driving forces of martensitic transformation and martensitic reorientation are derived from the reduced Clausius-Duhem inequality. In order to achieve numerical stability and to improve computational efficiency, additional constraints on the evolution of martensite volume fraction are introduced. The texture of NiTi tubes is taken into consideration. It is verified that the measured superelastic responses under various loading conditions are well approximated by the presented approach.
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页数：13
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