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《材料导报》期刊社  2017, Vol. 31 Issue (6): 153-160    https://doi.org/10.11896/j.issn.1005-023X.2017.06.030
  计算模拟 |
考虑加/卸载速率影响的Ti-Ni形状记忆合金简化本构模型
余滨杉1, 樊禹江2, 王社良1, 杨涛1
1 西安建筑科技大学土木工程学院, 西安710055;
2 长安大学建筑学院, 西安710061
A Simplified Constitutive Model of Ti-Ni Shape Memory Alloy Considering
Loading/Unloading Rate
YU Binshan1, FAN Yujiang2, WANG Sheliang1, YANG Tao1
1 School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055;
2 School of
Architecture, Chang’an University, Xi’an 710061
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摘要 系统研究了Ti-Ni形状记忆合金丝(SMA)应力-应变曲线、特征点应力、耗能能力、等效阻尼比随材料直径、应变幅值、加载速率、加载循环次数的变化规律;针对SMA唯象Brinson本构模型无法描述SMA动态力学性能的缺点,结合前述试验结果,提出了一种可考虑加/卸载速率影响的SMA简化本构模型。应用该模型对试验用SMA丝进行模拟,所得应力-应变曲线各特征点平均误差仅为3%,结果表明:所建立的速率相关SMA简化本构模型可较为精确地描述SMA在应力诱发相变过程中的超弹性力学行为,同时可反映加/卸载速率和应变幅值等主要因素对其动力本构模型的影响;该模型结构形式简单,具有较好的工程应用前景。
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余滨杉
樊禹江
王社良
杨涛
关键词:  形状记忆合金  Brinson本构模型  速率相关  动力本构模型    
Abstract: Systematic study was conducted on variation regularity for stress-strain curve, feature points stress, dissipated energy, equivalent damping ratio of Ti-Ni shape memory alloy (SMA) wires changed with diameter of wires, strain amplitude, loa-ding rate and loading cyclic number. Combining with above experimental results, a simplified constitutive model for SMA considering loading/unloading rate was proposed, aiming at making up the disadvantage of phynomenological Brinson constitutive model that cannot describe dynamic mechanical property of SMA. Then, simulation of experimental SMA wires with this constitutive model was conducted. The average errors of feature points in stress-strain curve were only 3%. The results showed the proposed simplified rate-dependent constitutive model of SMA could satisfactorily describe the superelastic mechanical behavior of SMA during the stress-induced transformation, and reflect the influence of dominant factors such as loading/unloading rate and strain amplitude to the dynamic constitutive model. Therefore, with simple formulation, the constitutive model is useful for practical engineering application of SMA.
Key words:  shape memory alloy (SMA)    brinson constitutive model    rate-dependent    dynamic constitutive model
               出版日期:  2017-03-25      发布日期:  2018-05-02
ZTFLH:  TU502+.6  
基金资助: 国家自然科学基金(51678480);陕西省工业攻关项目(2014K06-34);陕西省博士后基金
作者简介:  余滨杉:1990年生,博士研究生,主要研究方向为新型智能材料及其在结构振动工程中的应用,E-mail:yubinshan99@163.com
引用本文:    
余滨杉, 樊禹江, 王社良, 杨涛. 考虑加/卸载速率影响的Ti-Ni形状记忆合金简化本构模型[J]. 《材料导报》期刊社, 2017, 31(6): 153-160.
YU Binshan, FAN Yujiang, WANG Sheliang, YANG Tao. A Simplified Constitutive Model of Ti-Ni Shape Memory Alloy Considering
Loading/Unloading Rate. Materials Reports, 2017, 31(6): 153-160.
链接本文:  
http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.06.030  或          http://www.mater-rep.com/CN/Y2017/V31/I6/153
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