Piecewise Linear Analysis for Pseudo-elasticity of Shape Memory Alloy (SMA)  

作　　者：王晓东 杜晓伟 孙国钧 

机构地区：[1]Dept.of Eng. Mechanics,Shanghai Jiaotong Univ., Shanghai 200030,China

出　　处：《Journal of Shanghai Jiaotong university(Science)》2005年第1期48-51,共4页上海交通大学学报（英文版）

基　　金：National Natural Science Foundation ofChina(No.5 973 10 3 0 )

摘　　要：Based on the Brinson constitutive model of SMA, a piecewise linear model for the hysteresis loop of pseudo-elasticity is proposed and applied in the analysis of responses of an SMA-spring-mass system under initial velocity activation. The histories of displacement and velocity of the mass, and the response of stress of SMA are calculated with Brinson’s model and the piecewise linear model. The difference of results of the two models is not significant. The calculation with piecewise-linear model needs no iteration and is highly efficient.Based on the Brinson constitutive model of SMA, a piecewise linear model for the hysteresis loop of pseudo-elasticity is proposed and applied in the analysis of responses of an SMA-spring-mass system under initial velocity activation. The histories of displacement and velocity of the mass, and the response of stress of SMA are calculated with Brinson's model and the piecewise linear model. The difference of results of the two models is not significant. The calculation with piecewise-linear model needs no iteration and is highly efficient.

关 键 词：shape memory alloy(SMA) PSEUDO-ELASTICITY piecewise linear model Brinson's constitutive law 

分 类 号：TG139.6[一般工业技术—材料科学与工程]