| 超弹性形状记忆合金简化多维本构模型 |
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| 引用本文： | 陈鑫,李爱群,左晓宝.超弹性形状记忆合金简化多维本构模型[J].东南大学学报(自然科学版),2009,39(4). |
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| 作者姓名： | 陈鑫 李爱群 左晓宝 |
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| 作者单位： | 1. 东南大学土木工程学院,南京,210096
2. 南京理工大学土木工程系,南京,210094 |
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| 基金项目： | 国家"十一五"科技支撑计划资助项目 |
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| 摘 要： | 建立简单有效的多维本构模型是形状记忆合金(SMA)工程应用的关键问题之一.在NiTi形状记忆合金丝拉伸实验的基础上,根据Brison模型的相变动力学方程,得出了相变应力与加载条件的关系. 借助线性化方法,建立了SMA超弹性简化一维本构模型;基于塑性理论,将马氏体体积分数作为状态变量之一,推导了SMA超弹性简化多维本构模型,应用该模型对超弹性SMA进行了数值模拟,并与实验结果进行了比较.分析结果表明:理论模型曲线与实验曲线接近,理论模型能够较为准确地模拟形状记忆合金的屈服机制和耗能能力.该本构模型可以用于模拟复杂荷载条件下的SMA超弹性特性.
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| 关 键 词： | 形状记忆合金 超弹性 多维本构模型 |
Simplified multidimensional constitutive model of super-elasticity shape memory alloy |
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| Chen Xin,Li Aiqun,Zuo Xiaobao.Simplified multidimensional constitutive model of super-elasticity shape memory alloy[J].Journal of Southeast University(Natural Science Edition),2009,39(4). |
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| Authors: | Chen Xin Li Aiqun Zuo Xiaobao |
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| Institution: | Chen Xin1 Li Aiqun1 Zuo Xiaobao2(1 School of Civil Engineering,Southeast University,Nanjing 210096,China)(2Department of Civil Engineering,Nanjing University of Science , Technology,Nanjing 210094,China) |
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| Abstract: | In the field of engineering application of shape memory alloy(SMA),it is one of the key factors to establish a simple and useful multidimensional constitutive model.On the basis of the experimental results of NiTi shape memory alloy wires,and according to the martensitic transformation kinetic equations of Brison's model,the relationship between transformation stresses and loading conditions was obtained.By means of linear method,a super-elastic simplified one-dimensional constitutive model of SMA was estab... |
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| Keywords: | shape memory alloy super-elasticity multidimensional constitutive model |
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