Wear Analysis of Brake Pad for CRH380A High-speed Train

被引：0
|
作者：
Fan Z. [1 ]
Xiang Z. [1 ]
Tan D. [1 ]
Tang B. [1 ]
Li Z. [1 ]
Mo J. [1 ]
Zhou Z. [1 ]
机构：
[1] Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan
来源：
Mocaxue Xuebao/Tribology | 2020年 / 40卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Brake pad; Finite element analysis; Friction block; Stress concentration; Wear;
D O I：
10.16078/j.tribology.2019156
中图分类号：
学科分类号：
摘要：
In this study, a serviced brake pad on CRH380A high-speed train was collected, and the wear features and corresponding wear mechanisms of the brake pad were analyzed by different micro-analysis methods. Exfoliation and cracks were found to be the main wear features of the brake pad. Combining the microscopic analysis of the worn surface and the finite element analysis of stress distribution at different friction blocks, the wear mechanisms of the two kinds of wear features above were clarified. The results show that the exfoliation of the friction block was mainly caused by the micropores formed during material processing, and the difference of the material components' hardness and wear resistance. The contact stress concentrated on the leading edge of brake pad may be one of the leading reasons for the nonuniform wear. In addition, stress concentration can be found near the center hole of the friction block, which made the initiation of cracks much easy around the edge of the hole. The micropores formed during their material processing and the insufficient bonding strength between different components also led to the initiation and propagation of cracks. © 2020, Science Press. All right reserved.
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页码：185 / 194
页数：9
相关论文
共 15 条
  • [1] Piyush C., Verma, Menapace L., Et al., Braking pad-disc system: Wear mechanisms and formation of wear fragments, Wear, 322 323, pp. 251-258, (2015)
  • [2] Gao F., Song B., Fu R., Et al., Study on the particle-reinforced Cu-matrix brake pads for 300 km•h<sup>-1</sup> high-speed trains, China Railway Science, 28, 3, pp. 62-67, (2007)
  • [3] Wang L., Pan Q., Zhu S., Et al., Fabrication of copper-based powder metallurgy brake pad for high-speed train and its friction and wear property, Materials for Mechanical Engineering, 41, 6, pp. 55-58, (2017)
  • [4] Yao P., Xiao Y., Zhang Z., Et al., Progress in powder metallurgical brake materials for high-speed trains, Materials China, 38, 2, pp. 116-125, (2019)
  • [5] Li J., Hu W., Jiao B., Development of powder metallurgy brake pads for EMUs, China Railway Science, 30, 3, pp. 141-144, (2009)
  • [6] Li Z., Han J., Yang Z., Et al., Analyzing the mechanisms of thermal fatigue and phase change of steel used in brake discs, Engineering Failure Analysis, 57, pp. 202-218, (2015)
  • [7] Wang Q., Yao P., Zhou H., Et al., Wear map of Cu-based powder metallurgy friction materials using Cr as a friction component, Tribology, 37, 3, pp. 364-371, (2017)
  • [8] Kchaou M., Sellami A., Abu-Bakar A.R., Et al., Brass fillers in friction composite materials: Tribological and brake squeal characterization for suitable effect evaluation, Steel and Composite Structures, 19, 4, pp. 939-952, (2015)
  • [9] Neis P.D., Ferreira N.F., Fekete G., Et al., Towards a better understanding of the structures existing on the surface of brake pads, Tribology International, 105, pp. 135-147, (2017)
  • [10] Wang Y., Yan Q., Zhang X., Et al., Effect of copper powders on properties of Cu-based friction material, Chinese Journal of Materials Research, 27, 1, pp. 37-42, (2013)
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