含缺口纳晶铜的失效行为研究  

Study of Failure Behavior of Notched Nanocrystalline Copper

作　　者：佟尚 周剑秋[1,2] 张烽 杨宝童 TONG Shang;ZHOU Jianqiu;ZHANG Feng;YANG Baotong(Department of Mechanical Engineering, Nanjing Tech. University, Nanjing 210009, China;Department of Mechanical Engineering, Wuhan University of Technology, Wuhan 430070, China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京210009 [2]武汉工程大学机械与动力工程学院,湖北武汉430070

出　　处：《机械制造与自动化》2019年第4期14-16,29,共4页Machine Building & Automation

基　　金：国家自然科学基金(10872087,11272143)

摘　　要：模拟了含有缺口的纳晶铜在拉伸载荷下的变形情况,研究缺口对纳晶铜失效行为的影响。结果表明,缺口对纳晶铜失效行为的影响与缺口的尺寸有关。随着缺口尺寸的增大,缺口对纳晶铜的失效影响愈发明显,缺口的临界值尺寸等于纳晶铜晶粒的平均尺寸。同时,通过不同模型间的对比发现,纳晶铜对缺口的敏感性与缺口形状和样本尺寸无关。The deformation of notched nanocrystalline copper under tensile load is simulated, and the effect of the notch on the failure behavior of nanocrystalline copper is studied. The results show that its effect is related to the size of the notch. With the size increasing, the effect becomes more obvious. The critical value of the notch is equal to the average size of the nanocrystalline copper crystal grains. At the same time, through the comparison between different models, it is found that the sensitivity of the nanocrystalline copper to the notch is independent of the notch shape and the sample size.

关 键 词：纳晶铜 缺口 分子模拟 剪切带 失效行为 

分 类 号：TB302.3[一般工业技术—材料科学与工程]