NiTi形状记忆合金应变传感特性分析  

Strain sensing properties of shape memory alloy

作　　者：崔迪[1,2] 李宏男[2] 宋钢兵[2] 

机构地区：[1]大连大学辽宁省高校复杂结构体系灾害预测与防治重点实验室,大连116622 [2]大连理工大学海岸和近海工程国家重点实验室,大连116024

出　　处：《哈尔滨工业大学学报》2009年第11期178-181,共4页Journal of Harbin Institute of Technology

基　　金：国家杰出青年科学基金资助项目(50025823);海外青年学者研究基金资助项目(50328807)

摘　　要：阐述了形状记忆合金丝的应变传感原理.在Brinson建立的形状记忆合金一维本构模型的基础上,引入Ikuta提出的电阻率与马氏体百分含量之间的关系并对其进行简化,建立了形状记忆合金应变传感特性的理论分析模型.分析了不同温度条件、不同初始状态的形状记忆合金电阻相对变化率与应变之间的关系.并与已有试验结果进行比较,验证了该模型的有效性.结果表明,形状记忆合金可以作为应变传感元件使用,温度对形状记忆合金的传感特性有影响,设计时要根据使用温度来确定形状记忆合金的相变温度.The strain sensing principle of shape memory alloy （SMA） is analyzed in this paper. Based on the combination of the relationship between electrical resistivity and martensite fraction of SMA proposed by Ikuta and the one-dimensional constitutive model developed by Brinson, an analytical model of the relative variation of resistance versus the strain is developed. This model can be used under different initial conditions at different temperatures. And the validity of this model is verified by comparing the simulation results with the existing experimental results. It is indicated that an SMA wire can be utilized as a sensing element. The temperature has an effect on the sensing characteristics and should be isolated.

关 键 词：形状记忆合金 电阻率 应变传感 本构关系 

分 类 号：TU311[建筑科学—结构工程] TB381[一般工业技术—材料科学与工程]