【作者】 张雨烨； 阎石； 马宁；

【Author】 ZHANG Yu-ye1,YAN Shi1,2, SONG Gangbing2,MA Ning2 (1.School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China; 2. Cullon college of Engineering, University of Houston, Houston, TX 77204,USA)

【机构】 沈阳建筑大学土木工程学院； 美国休斯顿大学卡伦工程学院；

【摘要】 随着对形状记忆合金(SMA)研究的不断深入,其几种特殊性质得到了越来越广泛的应用。其中关于SMA电阻-应变滞回模型的研究,已经受到国内外学者高度的重视。由于SMA的电阻与应变之间存在有规律性的关系,可以利用这种关系,把SMA作为传感器应用到结构的健康监测中去。但实验表明SMA的电阻-应变关系具有较强的非线性性质,表现出明显的滞回特性。本文利用Preisach理论建立SMA的电阻-应变模型。在实验的基础上,通过训练得到SMA的电阻-应变表达式,并利用另一组实验数据验证了该方法的有效性,为进一步开展利用SMA电阻特性的结构健康诊断的研究奠定了基础。更多还原

【Abstract】 Shape memory alloys (SMAs) have been widely used in various fields of engineering since its special properties with the further development of researches on it. Researchers in our country and abroad have paid attentions to the relationship between the electrical resistance (ER) and the strain of the SMAs because the relationship can be effectively used in structural health monitoring by distributing the SMA wires into the structure and using them as sensors. However, the experiments on the ER of SMAs show that the relationship between the ER and the strain of SMAs is greatly nonlinear and exhibits hysteresis property. Based on the experimental data, the relationship is set up in the paper by using Preisach theory and training the hysteresis loops. The other test data are used to validate the efficiency of the model, which can lay a basic foundation to researches on the structural health monitoring by using SMAs in the future.更多还原