DOI QR코드

DOI QR Code

Numerical Study on the Hot Spots of Friction Surface in Disk Brakes

디스크 브레이크 마찰표면의 적열점에 관한 수치적 연구

  • 김청균 (홍익대학교 트라이볼로지 연구센터) ;
  • 조승현 (홍익대 기계 시스템디자인 공학과)
  • Published : 2004.11.01

Abstract

This paper presents the thermally induced hot spot characteristics of rubbing surface in the friction pad disk brake. During the braking period, the rubbing surface with irregular asperities that are strongly engaged in rough surface, wear, and deformed surface due to a friction heating may produce an irregular distorted geometry of the disk surface. The tribological interactions between the disk and the pads are unstable if the contact stress is severe, in which the irregularity develops the contact pressure distribution, leading eventually to localized contact, high temperature and formation of hot spots. The computed results of contact spots that are simulated using a coupled thermal-mechanical analysis present sinusoidal distortions and localized extrusions of the disk surface, which are strongly related to a hot spot in the practical disk brake.

Keywords

Hot Spot;Thermal Distortion;Thermoelastic Wear;Friction;Wear

References

  1. Rainbolt, J. D., 1975, 'Effects of Disk Material Selection on Disk Brake Rotor Configuration,' SAE 750733, pp. 1973-1814
  2. Anderson, A. E. and Knapp, R. A., 1989, 'Hot Spotting in Automotive Friction Systems,' Intl. Conf. on Wear of Materials, Vol. 2, pp. 673-680
  3. Jimbo, Y., Mibe, T., Akiyama, K., Matsui, H., Yoshida, M. and Ozawa, A., 1990, 'Development of High Thermal Conductivity Cast Iron for Brake Disk Rotors,' SAE 900002, pp. 22-28
  4. Burton, R. A., 1980, 'Thermal Deformation in Frictionally Heated Contact,' Wear, Vol. 59, pp. 1-20 https://doi.org/10.1016/0043-1648(80)90266-5
  5. Anderson, A. E. and Knapp, R. A., 1989, 'Hot Spotting in Automotive Friction Systems,' Intl. Conf. on Wear of Materials, Vol. 2, pp. 673-680
  6. Kim, C. K., 1995, 'Finite Element Analysis of Temperature Distribution and Thermally Caused Deformation in Ventilated Disk Brakes,' 95' Korea-USA Tribology Symposium, pp. 251-258
  7. Floquet A. and Dubourg, M. C., 1996, 'Realistic Braking Operation Simulation of Ventilated Disk Brakes,' J. of Tribology, Vol. 118, pp. 466-472 https://doi.org/10.1115/1.2831559
  8. MARC Program Capabilities, 1996, MARC Analysis Research Corp., Palo Alto, CA.