SMA 伪弹性和形状记忆特性的描述  

A Description for Pseudoelasticity and Shape Memory Effect of SMA

作　　者：彭向和[1] 韩勇[1] 黄尚廉[1] 

机构地区：[1]重庆大学智能结构研究中心

出　　处：《重庆大学学报（自然科学版）》1999年第1期1-6,共6页Journal of Chongqing University

基　　金：国家自然科学基金;教育部和航空科学基金;机械传动国家重点实验室资助

摘　　要：基于混合物理论，结合Ｔａｎａｋａ的相变描述，给出了小变形、初始各向同性和塑性不可压缩条件下形状记忆合金的三维本构方程。对不同温度下形状记忆合金材料的特性进行了描述，预言了单调及循环加载下的响应和正、反相变行为及其温度影响；动态相变过程对应力响应的影响，高温相下的强度增加等。Pseudoelasticity and shape memory effect(SME) are the most fundamental properties of shape memory alloys (SMAs), which can be attributed to the combination of the individual property of each phase of SMAs that are dynamically composed of austenite and martensite. Based on the theory of mixture, a constitutive model is proposed, in which, the behavior of austenite is further assumed to be linear elastic while that of martensite elastoplastic. The behavior of SMA under different temperature is described and compared with experimental observation. Compared with the existing model, the proposed model is simple, physically distinct and can easily be applied in practical engineering problems.

关 键 词：形状记忆合金 伪弹性 形状记忆效应 本构模型 

分 类 号：TG139.6[一般工业技术—材料科学与工程]