A CONSTITUTIVE RELATION FOR PSEUDO-ELASTIC BEHAVIOUR IN SHAPE MEMORY ALLOYS  

出　　处：《Acta Mechanica Sinica》1991年第1期67-75,共9页力学学报（英文版）

基　　金：The project supported by National Natural Science Foundation of China.

摘　　要：A constitutive relation to describe pseudo-elastic deformation in shape memory alloys is pres- ented in this paper. It is capable of describing deformation behaviour of polycrystalline materials under triaxial stress state as well as of monocrystalline materials under one-dimensional condition. Total strain rate is sup- posed to be composed of elastic strain rate and transformation strain rate. Deformation behaviour of Cu-Zn-Sn alloy and Ti-Ni alloy is simulated by use of the proposed constitutive relation. It is shown that simulated results are in a good agreement with experimental data.A constitutive relation to describe pseudo-elastic deformation in shape memory alloys is pres- ented in this paper. It is capable of describing deformation behaviour of polycrystalline materials under triaxial stress state as well as of monocrystalline materials under one-dimensional condition. Total strain rate is sup- posed to be composed of elastic strain rate and transformation strain rate. Deformation behaviour of Cu-Zn-Sn alloy and Ti-Ni alloy is simulated by use of the proposed constitutive relation. It is shown that simulated results are in a good agreement with experimental data.

关 键 词：constitutive relation shape memory alloys PSEUDO-ELASTICITY phase transfonnations 

分 类 号：O3[理学—力学]