A CONSTITUTIVE MODEL FOR TRANSFORMATION, REORIENTATION AND PLASTIC DEFORMATION OF SHAPE MEMORY ALLOYS

被引：0

作者：

Xianghe Peng Bin Chen Xiang Chen Jun Wang Huyi Wang Department of Engineering Mechanics Chongqing University Chongqing China ^{[1
,1
,1
,2
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]}

State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing China China Academy of Engineering Physics Mianyang China ^{[400044
,2
,621900
]}

机构：

来源：

ActaMechanicaSolidaSinica | 2012年 / 25卷 / 03期

关键词：

shape memory alloys; two-phase mixture; transformation; reorientation; plasticity; constitutive model;

D O I：

暂无

中图分类号：

TG139.6 [];

学科分类号：

080502 ;

摘要：

A constitutive model is developed for the transformation, reorientation and plastic deformation of shape memory alloys (SMAs). It is based on the concept that an SMA is a mixture composed of austenite and martensite, the volume fraction of each phase is transformable with the change of applied thermal-mechanical loading, and the constitutive behavior of the SMA is the combination of the individual behavior of its two phases. The deformation of the martensite is separated into elastic, thermal, reorientation and plastic parts, and that of the austenite is separated into elastic, thermal and plastic parts. Making use of the Tanaka's transformation rule modified by taking into account the effect of plastic deformation, the constitutive model of the SMA is obtained. The ferroelasticity, pseudoelasticity and shape memory effect of SMA Au-47.5 at.%Cd, and the pseudoelasticity and shape memory effect as well as plastic deformation and its effect of an NiTi SMA, are analyzed and compared with experimental results.

引用

页码：285 / 298

页数：14

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