Thermomechanical coupling in shape memory alloys under cyclic loadings: Experimental analysis and constitutive modeling

被引：145

作者：

Morin, Claire ^{[1
]}

Moumni, Ziad ^{[1
]}

Zaki, Wael ^{[2
]}

机构：

[1] Ecole Natl Super Tech Avancees, Mat & Struct Lab, F-91761 Palaiseau, France

[2] Khalifa Univ Sci Technol & Res, Abu Dhabi, U Arab Emirates

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2011年 / 27卷 / 12期

关键词：

Shape memory alloys; Cyclic superelasticity; Thermomechanical coupling; Loading rate effect; Fatigue; POLYCRYSTALLINE SMAS; TI-NI; PHENOMENOLOGICAL ANALYSIS; BEHAVIOR; FATIGUE; PSEUDOELASTICITY; STRAIN; DEFORMATION; WIRE;

D O I：

10.1016/j.ijplas.2011.05.005

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, we examine the influence of thermomechanical coupling on the behavior of superelastic shape memory alloys subjected to cyclic loading at different loading rates. Special focus is given to the determination of the area of the stress-strain hysteresis loop once the material has achieved a stabilized state. It is found that this area does not evolve monotonically with the loading rate for either transient or asymptotic states. In order to reproduce this observation analytically, a new model is developed based on the ZM model for shape memory alloys which was modified to account for thermomechanical coupling. The model is shown to predict the non-monotonic variation in hysteresis area to good accord. Experimentally observed variations in the temperature of SMA test samples are also correctly reproduced for lower strain rates. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1959 / 1980

页数：22

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