• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2024, Vol. 60 ›› Issue (7): 195-202.doi: 10.3901/JME.2024.07.195

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Simulation of High-temperature Wear Degradation of Train Brake Pad Friction Block Considering Temperature-dependent Wear Rate

JIANG Xinchi1, LU Chun1,2, MO Jiliang1,2, CHEN Xiaoting1, ZHANG Qinghe1, ZHAO Jing1   

  1. 1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031;
    2. Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031
  • Received:2023-04-21 Revised:2023-10-24 Online:2024-04-05 Published:2024-06-07

Abstract: With the increase in speed and the opening of complex lines, the high-temperature wear of friction blocks is more serious. To study the high-temperature wear of friction blocks, the relationship between the wear rate of copper-based powder metallurgy friction blocks and temperature is tested. A simulation method for high-temperature wear of friction block considering the influence of temperature-dependent wear rate is put forward. The effect of temperature-dependent wear rate on the accurate prediction of friction and wear behavior of friction bocks is studied. The results indicate that with the increase in temperature, the wear rate of the friction block increases seriously. The temperature-dependent wear rate is crucial for the accurate prediction of the wear amount and distribution. When the interface temperature is lower than 80 ℃, the prediction error without considering the temperature-dependent wear rate is within 10%. When the interface temperature is higher than 200 ℃, the prediction error without considering the temperature-dependent wear rate is more than 60%. The results are important for accurate wear prediction of railway friction blocks.

Key words: wear rate, brake friction block, high-temperature wear, wear prediction, railway train

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