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http://dx.doi.org/10.9725/kstle.2005.21.2.063

A Study on Thermal Cracking of Ventilated Brake Disk of a Car Using FEM Analysis  

Kim Ho-Kyung (Department of Automotive Engineering, Seoul National University)
Chung Chin-Sung (Bowon Light Metal Co.)
Choi Myung-Il (Dentium Co.)
Lee Young-In (Department of Automotive Engineering, Seoul National University)
Publication Information
Tribology and Lubricants / v.21, no.2, 2005 , pp. 63-70 More about this Journal
Abstract
This study presents the thermal cracking on a commercial vehicle ventilated brake disk. Distributions of temperature and thermal stress of the disk were analysed, using FEM analysis, under the several driving conditions with actual vehicle specifications. The results from the fatigue tests on the disk material were compared with those from FEM analysis. In case of deceleration of 0.6 g with initial vehicle speed of 97, 140, and 160 km/h, the maximum compressive stress at the disk surface of disk due to braking was 224, 318, and 362 MPa, respectively. It was estimated that each damage fraction of 0.00005, 0.00050, 0.00136 per full stop was imposed on the brake disk in case of deceleration of 0.6 g with initial vehicle speed of 97, 140, and 160 km/h, respectively.
Keywords
ventilated disc brake; thermal cracking; damage fraction; thermal stress; strain controlled fatigue test;
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  • Reference
1 Kim, C.K., 'The Effect of Thermoelastic and Wear on the Leakage of Compressible Gases in Shaft Seals,' KSME J., Vol. 2, No. 2, pp. 133-139, 1988
2 Crolla, D.A. and Lang, A.M., 'Brake Noise and Vibration - The State of Art,' I. Mech. Eng, 1991
3 ANSYS User Manual Version 5.4
4 승용차용 브레이크 실차 시험방법 KS R 1117, 한국표준협회, 1999
5 Limpert, R., 'Brake Design and Safety,' Society of Automotive Engineers, Inc., 1992
6 Sheridan, D.C., Kutchey, J.A. and Samie, F, 'Approaches to the Thermal Modeling of Disc Brakes,' SAE, pp. 268-283, 1989
7 Rhee, S.K., Jacko, M.G. and Tsang, P.H.S., 'The Role of Friction Film in Friction, Wear, and Noise of Automotive Brakes,' SAE 900004, pp. 29-38, 1990
8 Lui, T. and Rhee, S.K., 'High Temperature Wear of Semi-metallic Disk Brake Pads,' Proc. of the Con­ference on Wear of Materials, pp. 552-554, 1977