Title: Cold wear of brake disc related to brake induced vibrations

Authors: Roberto C. Dante, Carlo Navire

Addresses: Department of Engineering Division, Instituto Tecnologico de Monterrey, Campus Mexico City, Calle del Puente 222, Col., Ejidos de Huipulco, C.P. 14380, Mexico City, Mexico. ' Department of Administration, ISIBOND s.a.s. Via F.lli Santi 13, Moncalieri-Vado, Torino 10024, Italy

Abstract: The cold wear of brake disc is a phenomenon related to judder and other kinds of vibrations. The mechanism and the parameters concerning the cold wear of the disc are the basis for the comprehension of the sources of brake induced vibrations. As a continuation of prior research, a tribometric study was conducted with different disc materials: grey cast iron and inox steel. The wear rates of the above materials were measured at different pressure levels and with the same initial temperature. A parametric model was developed to correlate disc thickness variation (DTV) measurements of the different friction coupled with variables affecting DTV. The final model of disc cold wear takes an easy form compatible with the proposed mechanism of wear. The balance among oxide layer-transfer, layer growth and heterogeneous wear is determinant for DTV formation and consequently, brake induced vibrations.

Keywords: judder; brake disc wear; cold wear; disc thickness variation; brake induced vibrations; disc brake vibration; vehicle vibration; automotive disc brakes; friction.

DOI: 10.1504/IJVNV.2005.007528

International Journal of Vehicle Noise and Vibration, 2005 Vol.1 No.3/4, pp.287 - 306

Available online: 02 Aug 2005 *

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