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Caractérisation expérimentale du contact frottant disque garniture sous sollicitations sévères de freinage. Prise en compte des interactions tribologie, thermique et physico-chimie.

Abstract : This study deals with the behaviour of a pad on disc rubbing contact under severe braking loadings. Those conditions are observed in railway application during an emergency stop braking or a succession of stop brakings with heat accumulation. The chosen multiphysical approach takes account of the interactions between tribology, heat science and physical chemistry. The work is presented in 4 parts.
The first presents the characterization of the studied materials (an organic matrix composite and a grey cast iron) and the experimental devices used.
The second deals with the degradation of the organic matrix composite with temperature and its influence on the tribological behaviour of the studied materials as well as on the physical mechanisms activated in the contact.
The third concerns the behaviour of the pad on disc rubbing contact under the two types of severe braking loadings. The evolutions of the friction coefficient are correlated with the thermal localisation observed with an infrared camera and with the physical mechanisms identified by friction surfaces observations and analysis performed after the braking.
The fourth sets out the study of the evolution of the friction physical mechanisms activated during the high-energy stop braking and their interactions with the local and transient thermal phenomena observed at the surface. Friction surfaces are observed and analysed after interrupted stop brakings performed before stop at typical steps of the braking. In-situ observations of the friction disc track are also performed using a video camera to corroborate the results obtained by post-mortem observations.
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https://tel.archives-ouvertes.fr/tel-00161405
Contributor : Anne Lise Bulthé <>
Submitted on : Tuesday, July 10, 2007 - 3:58:07 PM
Last modification on : Tuesday, November 24, 2020 - 2:18:05 PM
Long-term archiving on: : Thursday, April 8, 2010 - 10:51:14 PM

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  • HAL Id : tel-00161405, version 1

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Anne Lise Bulthé. Caractérisation expérimentale du contact frottant disque garniture sous sollicitations sévères de freinage. Prise en compte des interactions tribologie, thermique et physico-chimie.. Mécanique [physics.med-ph]. Ecole Centrale de Lille; Université des Sciences et Technologie de Lille - Lille I, 2006. Français. ⟨tel-00161405⟩

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