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Approche thermomécanique de la tribologie à grande vitesse - Application au freinage

Abstract : This work is supported by International Campus on Safety and Intermodality in Transportation. Objective approach is developed so as to identify causes leading to fading phenomenon and braking tribosystem damage. Simplified brake pad behaviour is studied regarding pressure, sliding speed and temperature expected in automotive braking conditions. This pad is composed by phenolic resin reinforced by spherical steel particles.High Speed Tribology bench allows tribological caracterisation at reduced scale until 40 m.s−1. Disc temperature data are obtained thanks to telemetry system. Temperature field and dissipated heat flux are calculated with inverse heat conduction methods. Contact temperature, mean normal pressure and sliding speed influence on macroscopic friction coefficient is evaluated for pure phenolic resin and simplified composite pin. Pin surface micrographs show that contact zone damaging depend on thermal and mechanical conditions. Particle debonding is studied thanks to mesoscopic numerical model. Materials and cohesive properties are determined by rheological tests in heating chamber under several temperature. Static simulations show that high pressure and high temperature lead to reinforcement interface failure. Correlation between experimental tests on HST and numerical model are found.
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https://tel.archives-ouvertes.fr/tel-00629413
Contributor : Damien Meresse <>
Submitted on : Wednesday, October 5, 2011 - 5:30:39 PM
Last modification on : Friday, November 13, 2020 - 8:44:13 AM
Long-term archiving on: : Friday, January 6, 2012 - 2:36:43 AM

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  • HAL Id : tel-00629413, version 1

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Damien Méresse. Approche thermomécanique de la tribologie à grande vitesse - Application au freinage. Mécanique [physics.med-ph]. Université de Valenciennes et du Hainaut-Cambresis, 2011. Français. ⟨tel-00629413⟩

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