Journal of Northeastern University(Natural Science) ›› 2022, Vol. 43 ›› Issue (12): 1740-1747.DOI: 10.12068/j.issn.1005-3026.2022.12.010

• Mechanical Engineering • Previous Articles     Next Articles

Damage Tolerance and Remain Fatigue Life Evaluation of Shattered Rim of EMU Wheels

CONG Tao1,2, CHEN Gang3, WU Si2, ZHAO Sa2   

  1. 1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Metals and Chemistry Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China; 3. Baowu Group Masteel Rail Transit Materials Technology Company Limited, Maanshan 243021, China.
  • Published:2022-12-26
  • Contact: CONG Tao
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Abstract: Aiming at the shattered rim crack damage of a certain type of Chinese EMU in the actual line, the failure mechanism of the shattered rim of EMU wheels was revealed on the basis of comprehensive failure analysis. Based on the test data of wheel materials’ crack propagation, combined with Franc3D simulation analysis software, the crack propagation simulation calculation was carried out for the defect. The simulation results showed that both the size and distribution of the internal defects of the wheel have an impact on the rolling contact fatigue life of the wheel. The larger the defect size, the closer the distribution position is to the maximum stress area of the wheel, and the shorter the wheel’s fatigue life. The damage tolerance of the wheel is 3mm, which is consistent with the failure criterion of 3mm in the standard. The theoretical basis of the current standard(the equivalent size of a 3mm transverse hole)for detecting the crack failure of railway wheel rim in China is given.

Key words: wheel; shattered rim; crack propagation; damage tolerance; fatigue life evaluation

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