Optimization of brake disk wear loss due to brake pad structure

Abstract

Brake disk friction wear is an important cause of disk brake failure in high-speed trains, and the circumferential spacing of the friction block is an important factor affecting the amount of brake disk wear. In order to study the influence of the circumferential spacing of friction blocks on the wear of brake disk, based on Archard wear model, a three-dimensional transient model of brake disk and brake pad is established by using ANSYS finite element simulation software. The wear volume and wear rate of brake disk friction surface under three different circumferential spacing of friction blocks during emergency braking of trains are simulated and calculated. The contact stress and temperature variation of the brake disk friction surface are analyzed, and the influence of different friction block circumferential spacing on the contact stress and temperature distribution of the brake disk is given. Finally, based on the response surface method, the circumferential spacing of friction blocks was optimized to obtain the value of the circumferential spacing of friction blocks that minimizes the wear of the friction surface of the brake disk. The results show that the target response value is minimum when the friction block circumferential spacing D1 = 2.018 mm, D2 = 2.02 mm, D3 = 3.896 mm, D4 = 2.005 mm, D5 = 3.982 mm, D6 = 2.034 mm, D7 = 2.018 mm, D8 = 2.039 mm, and D9 = 2.031 mm. The optimized brake disk wear volume was reduced by 0.4% and the wear rate was also reduced by 0.4%. This study is significant for reducing the brake disk wear volume and improving the brake pad friction block structure layout.

Keywords:

• Friction block circumferential spacing
• wear volume
• wear rate
• contact stress
• temperature
• response surface optimization

Author contributions

Junyan Wang: conceived, designed, and performed the research and wrote the manuscript. Suxia Zhou: made contributions to the analysis of the results. Suxia Zhou and Junyan Wang discussed the basic structure of the manuscript. Xin Xin: reviewed the manuscript and supervised the study at all stages. Yuduo Sun: read and approved the submitted manuscript.

Ethical approval

All procedures performed in the work involved no human or animal participants.

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.

Statement of originality

I would like to declare on behalf of my coauthors that the work described was original research that has not been published previously and is not under consideration for publication elsewhere, in whole or in part.

Data availability statement

The data that support the findings of this study are available from the corresponding author WANG upon reasonable request.

Additional information

Funding

Supported by “The Beijing Natural Science Foundation Grant” (L211007).