An investigation to the pseudoelastic behavior of NiTi SMAs subjected to tensile and shear deformation
A microstructure-based constitutive model is proposed for the NiTi SMAs by three stages: 1) the constitutive relationships for the martensite phase and austenite phase, respectively; 2) the model for a cell composed of alternatively arranged parallel lamellas of austenite and martensite; and 3) the description for the NiTi SMAs by considering the materials as aggregates of numerous cells with different orientations and making use of Hills self-consistent scheme. The proposed model can satisfactorily describe the main characteristics of the pseudoelastic behavior of NiTi shape memory alloys under pure tension and pure torsion. The capability for the model to be applied to the pseudoelastic responses of NiTi SMAs under complex triaxial deformation is also discussed.
Xiang-he Peng Wen-li Pi Xue-song Long
Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China
国际会议
The 5th International Conference on Nonlinear Mechanics(第五届国际非线性力学会议)
上海
英文
228-233
2007-06-11（万方平台首次上网日期，不代表论文的发表时间）