Fatigue life prediction method for contact wire using maximum local stress

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• 作者：Yongseok Kim (1)
  Kiwon Lee (2)
  Haochuang Li (1)
  Chang-Sung Seok (1)
  Jae-Mean Koo (1)
  Sam-Young Kwon (2)
  Yong Hyeon Cho (2)
  
• 关键词：Contact wire ; Fatigue test ; Operating condition ; Copper alloy
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：29
• 期：1
• 页码：67-70
• 全文大小：679 KB
• 参考文献：1. Minsung Kang, Sangsoo Ahn, Jae Mean Koo, Chang Sung Seok, Kiwon Lee and Yong Hyeon Cho, Development of bending fatigue test system for trolley line simulating real conditions, / Proceedings of autumn conference of the Korean Society for Railway (2011) 3059鈥?064.
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• 作者单位：Yongseok Kim (1)
  Kiwon Lee (2)
  Haochuang Li (1)
  Chang-Sung Seok (1)
  Jae-Mean Koo (1)
  Sam-Young Kwon (2)
  Yong Hyeon Cho (2)
  
  1. Department of Mechanical Engineering, Sungkyunkwan University, Suwon, Korea
  2. Korea Railroad Research Institute, Uiwang, Korea
  
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824

文摘

Railway contact wires supplying electricity to trains are exposed to repeated mechanical strain and stress caused by their own weight and discontinuous contact with a pantograph during train operation. Since the speed of railway transportation has increased continuously, railway industries have recently reported a number of contact wire failures caused by mechanical fatigue fractures instead of normal wear, which has been a more common failure mechanism. To secure the safety and durability of contact wires in environments with increased train speeds, a bending fatigue test on contact wire has been performed. The test equipment is too complicated to evaluate the fatigue characteristics of contact wire. Thus, the axial tension fatigue test was performed for a standard specimen, and the bending fatigue life for the contact wire structure was then predicted using the maximum local stress occurring at the top of the contact wire. Lastly, the tested bending fatigue life of the structure was compared with the fatigue life predicted by the axial tension fatigue test for verification.