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Interactions between third-body flows and localisation phenomena during high-energy railways stop-braking

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2009
auteur(s) Desplanques Yannick; Degallaix Gérard
journal (abréviation) SAE International Journal of Passenger Cars - Mechanical Systems (SAE Int. J. Passeng. Cars - Mech.Sys.)
volume (numéro) 1 (1)
pages 1267 – 1275
résumé During railway braking, dissipation of high energy due to friction leads to transient and localised thermal phenomena such as hot bands and hot spots. These localisation phenomena interact with third body flows and friction mechanisms activated in the contact. To study these couplings, an experimental approach has been developed, based on an inertial tribometer able to reproduce high thermo-mechanical brake-disc loadings.
This paper focuses on the coupling between flows of third-body and hot-band migration. Transient localised thermal phenomena are described for high-energy stop-braking. The monitoring of the disc track during friction in the visible and infrared wavelengths evidences the interactions between third-body flows and hot-band migration. The consequences relatively to load-bearing areas and third-body compaction in the contact are studied, allowing the proposal of a synthetic diagram of the coupling between friction mechanisms, third body flows, hot-band migration and first-body distortion.
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