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材料工程  2014, Vol. 0 Issue (5): 78-85    DOI: 10.11868/j.issn.1001-4381.2014.05.014
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
基于DIC的预应变下铜/铝复层板各向异性性能检测与研究
孙涛1,2, 梁晋1, 郭翔1, 李磊刚1, 任茂栋1
1. 西安交通大学 机械工程学院, 西安 710049;
2. 四川工程职业技术学院 机电工程系, 四川 德阳 618000
Anisotropy Measurement and Investigation on Cu/Al Clad Metals After Prestrain Based on Digital Image Correlation
SUN Tao1,2, LIANG Jin1, GUO Xiang1, LI Lei-gang1, REN Mao-dong1
1. School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2. Department of Mechanical and Electrical Engineering, Sichuan Engineering Technical College, Deyang 618000, Sichuan, China
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摘要 基于数字图像相关法(DIC)与双目视觉技术,提出并实现了一种用于爆炸焊接制备的铜/铝复层板全场三维应变测量的方法。为了验证该方法的可行性,进行了Q235钢拉伸实验,将DIC法与引伸计变形测量结果进行了对比。应用DIC法对预应变下的复层板各向异性进行了性能检测与研究。结果表明:数字图像相关法的应变测量精度高于0.5%,与引伸计所测结果基本相当;随着预应变量的增加,复层板料力学参数的各向异性先增强后减弱;塑性应变比、应变硬化率的变化与预应变量和加载方向密切相关;板料轴向应变与宽向应变间的线性关系也受预应变与加载方向的影响。
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孙涛
梁晋
郭翔
李磊刚
任茂栋
关键词 数字图像相关法应变测量铜/铝复层板各向异性预应变    
Abstract:To measure the deformation of Cu/Al clad metals made by explosive welding technique,a new full-field three-dimensional deformation measurement method was proposed and implemented based on the digital image correlation(DIC) method and binocular stereovision. To validate the feasibility of the proposed method, an extensometer was used during the Q235 steel tensile test. The anisotropy of Cu/Al clad metals under uniaxial tension after prestrain was investigated. The results demonstrate that the accuracy of strain measurement is not lower than 0.5%, much close to that of the extensometer. With an increase in prestrain, the anisotropy of Cu/Al clad metals mechanical parameters increases first and decreases afterwards. The plastic strain ratio, strain hardening rate all strongly depend on loading directions and prestrains. The linear relations between longitudinal strain and transverse strain are also influenced by tensile directions and prestrains.
Key wordsdigital image correlation    strain measurement    Cu/Al clad metal    anisotropy    prestrain
收稿日期: 2012-06-29      出版日期: 2014-05-20
中图分类号:  TP13  
  TG132  
基金资助:国家自然科学基金资助项目(51275378,51275389)
通讯作者: 周光明(1966—),男,教授,主要从事先进复合材料结构设计、分析和工程问题的计算机建模与仿真,联系地址:江苏省南京市御道街29号南京航空航天大学航空宇航学院(210016),E-mail:zhougm@nuaa.edu.cn     E-mail: zhougm@nuaa.edu.cn
作者简介: 孙涛(1982- ),男,博士研究生,讲师,主要从事三维光学测量、有限元模拟方面的研究,联系地址:四川省德阳市泰山南路二段801号四川工程职业技术学院机电工程系(618000),E-mail:sunmark2005@163.com
引用本文:   
孙涛, 梁晋, 郭翔, 李磊刚, 任茂栋. 基于DIC的预应变下铜/铝复层板各向异性性能检测与研究[J]. 材料工程, 2014, 0(5): 78-85.
SUN Tao, LIANG Jin, GUO Xiang, LI Lei-gang, REN Mao-dong. Anisotropy Measurement and Investigation on Cu/Al Clad Metals After Prestrain Based on Digital Image Correlation. Journal of Materials Engineering, 2014, 0(5): 78-85.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2014.05.014      或      http://jme.biam.ac.cn/CN/Y2014/V0/I5/78
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