山东科学 ›› 2016, Vol. 29 ›› Issue (6): 62-67.doi: 10.3976/j.issn.1002-4026.2016.06.010

• 新材料 • 上一篇    下一篇

加载速率对动车组Huck铆钉剪切性能影响的研究

王永岩,张向峰,闫蕾蕾   

  1. 青岛科技大学机电工程学院,山东 青岛266061
  • 收稿日期:2016-06-16 出版日期:2016-12-20 发布日期:2016-12-20
  • 作者简介:王永岩(1956—),男,博士,教授,研究方向为振动与控制、结构仿真预测以及力学。E-mail:wangyongyan168@163.com
  • 基金资助:

    教育部科技发展中心项目(20133719110005)

Impact of loading rate on shear property of Huck rivet of EMUs

WANG Yong-yan, ZHANG Xiang-feng, YAN Lei-lei   

  1. School of Mechanical and Electrical Engineering, Qingdao University of Science & Technology, Qingdao 266061,China
  • Received:2016-06-16 Online:2016-12-20 Published:2016-12-20

摘要:

针对动车组速度不断提高而造成的Huck铆钉在运行中频繁断裂的问题,应用万能材料力学试验机对Huck铆钉铆接件在不同的加载速率下进行铆钉剪切试验,研究加载速率对其剪切力学性能的影响。通过对比3组不同加载速率下的Huck铆钉的剪切试验数据以及铆接件载荷位移曲线,得出随着加载速率的增加,Huck铆钉的弹性起点平均载荷值、塑性起点平均载荷值以及弹性区间均减小而刚度有所增加等规律。试验结果表明,当采用的Cr12MoV冷作模具钢洛氏硬度值HRC范围在40~50之间时,铆钉孔几乎不变形且铆接试件在动态载荷下不易断裂。本文获取的相关结论对Huck铆钉在动车组上的设计与改进将起到重要的参考作用。

关键词: Huck铆钉, 剪切性能, 加载速率

Abstract:

For the issue of continual speed increase of EMUs caused frequent Huck rivet rapture, we employ universal mechanical testing machine to perform rivet shear test for riveting components of Huck rivet with different loading rates to investigate the impact of loading rate on its shear mechanical property. Through the comparison of the shear test data and the loaddisplacement curve of Huck rivet of three different loading rates, we discover that average load value of elastic and plastic starting points and elastic scope of Huck rivet all decrease with the increase of loading rate, but its stiffness increases. Test results show that Huck rivet is not distorted and rivet hole is not apt to break when the HRC of Cr12MoV Cold Working Die steel is within the scope of 40~50. The relevant conclusion will provide significant reference for the design and improvement of Huck rivet of the EMUs.

Key words: Huck rivet, shear property, loading rate

中图分类号: 

  • TB302.2