La conception et l'analyse des performances d'un système de freinage nécessite la caractérisation de son comportement tribologique. Pour réaliser cette caractérisation en fonction de paramètres d'arrêt tels que la pression apparente de contact, le temps de freinage ou la vitesse de glissement, les essais sur tribomètre de freinage à échelle réduite sont plus adaptés que les essais à l'échelle 1, à condition de respecter les sollicitations thermiques de surface rencontrées à l'échelle 1. A partir d'une discussion sur les facteurs d'échelle et d'une analyse des flux de chaleur et d'énergie, tout un ensemble de conditions expérimentales peuvent être définies, qui respectent la même réponse théorique en température de surface. Une série d'essais simulant des freinages d'arrêt à partir de 140 km/h a été réalisée. Elle montre la très bonne corrélation entre prédictions et mesures expérimentales.
Friction behaviour is a critical factor in brake system design and performance. To describe the frictional behaviour as a function of the local conditions such as contact pressure, braking time, and sliding speed, it is more convenient to perform tribological investigations on a reduced-scale braking tribometer, if the surface thermal-loading encountered at full scale is effectively respected. Based on a discussion of scale factors, and on an analysis of heat flux and energies, various experimental conditions can be defined, respecting the same theoretical response in surface temperature. A series of simulating stop brakings from 140 km/h was conducted. It shows a very good correlation between predicted and experimental values.
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Keywords: Friction, Braking, Thermal analysis, Tribology, Testing, Reduced-scale
Olivier Roussette 1 ; Yannick Desplanques 1 ; Gérard Degallaix 1
@article{CRMECA_2003__331_5_343_0, author = {Olivier Roussette and Yannick Desplanques and G\'erard Degallaix}, title = {Repr\'esentativit\'e thermique d'essais tribologiques \`a \'echelle r\'eduite}, journal = {Comptes Rendus. M\'ecanique}, pages = {343--349}, publisher = {Elsevier}, volume = {331}, number = {5}, year = {2003}, doi = {10.1016/S1631-0721(03)00082-2}, language = {fr}, }
TY - JOUR AU - Olivier Roussette AU - Yannick Desplanques AU - Gérard Degallaix TI - Représentativité thermique d'essais tribologiques à échelle réduite JO - Comptes Rendus. Mécanique PY - 2003 SP - 343 EP - 349 VL - 331 IS - 5 PB - Elsevier DO - 10.1016/S1631-0721(03)00082-2 LA - fr ID - CRMECA_2003__331_5_343_0 ER -
Olivier Roussette; Yannick Desplanques; Gérard Degallaix. Représentativité thermique d'essais tribologiques à échelle réduite. Comptes Rendus. Mécanique, Volume 331 (2003) no. 5, pp. 343-349. doi : 10.1016/S1631-0721(03)00082-2. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(03)00082-2/
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