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Volume 29 Issue 2
Apr.  2016
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Journal of Southwest Jiaotong University  > 2016  >  29(2): 274-281.
JIANG Xiaoyu, LI Xiaotao, LI Xu, CAO Shihao. Research on Wheel/Rail Rolling Contact at High Speed and Fatigue Crack Propagation in Rail[J]. Journal of Southwest Jiaotong University, 2016, 29(2): 274-281. doi: 10.3969/j.issn.0258-2724.2016.02.007
Citation: JIANG Xiaoyu, LI Xiaotao, LI Xu, CAO Shihao. Research on Wheel/Rail Rolling Contact at High Speed and Fatigue Crack Propagation in Rail[J]. Journal of Southwest Jiaotong University, 2016, 29(2): 274-281. doi: 10.3969/j.issn.0258-2724.2016.02.007
shu

Research on Wheel/Rail Rolling Contact at High Speed and Fatigue Crack Propagation in Rail

doi: 10.3969/j.issn.0258-2724.2016.02.007
  • Received Date: 23 Oct 2015
  • Publish Date: 25 Apr 2016
    Abstract
  • To analyze the rolling contact fatigue damage of wheel/rail for high-speed trains, the distribution of contact forces between wheel and rail was obtained by introducing the strain-rate effect. Based on the maximum circumferential stress, the possible propagation angle of the crack was counted when a wheel roll over a crack and the crack propagation directions were determined. According to the Weibull distribution, crack path was obtained by using the average crack propagation angle as the crack propagation direction. The results show that the crack mode becomes to sliding crack from opening crack for low-speed trains. The crack mode is always opening crack for high-speed trains. The crack propagation velocity for high-speed trains is faster than that of low-speed trains. The simulation crack path is in agreement with the experimental crack path, which proves that it is reasonable to use the average crack propagation as crack propagation direction.

     

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