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Étude de la lubrification EHD rugueuse établie localementdans un palier

Published online by Cambridge University Press:  16 December 2004

Ingrid Riche  and
Bernard Villechaise
Ingrid Riche
Affiliation:
Laboratoire de Mécanique des Solides, Équipe Structures et Interfaces, 4 avenue de Varsovie, 16021 Angoulême Cedex, France
Bernard Villechaise
Affiliation:
Laboratoire de Mécanique des Solides, Équipe Structures et Interfaces, 4 avenue de Varsovie, 16021 Angoulême Cedex, France
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Abstract

Nous étudions ici la lubrification d'un palier dans une zone très localisée où l'épaisseur du film est particulièrement faible. Le problème ainsi posé est un problème de lubrification élastohydrodynamique rugueuse où il y a de fortes variations relatives d'épaisseur de film. Nous comparons les résultats obtenus dans cette situation par les équations de Navier-Stokes d'une part et par l'équation de Reynolds d'autre part. Puis nous regardons les influences mutuelles des différentes fréquences spatiales de la rugosité et du film lubrifiant.Les travaux en lubrification sont nombreux. Nous rappelons le classement bien connu des situations de lubrification, explicité sur une courbe de Stribeck, qui ordonne selon les épaisseurs croissantes de film, la lubrification limite, la lubrification mixte et la lubrification en film complet. Ceci nous conduit à considérer notre situation micro-élastohydrodynamique comme intermédiaire entre les lubrifications limite et mixte. Nous proposons ensuite une revue bibliographique montrant les deux approches, statistiques et déterministes, utilisées généralement pour intégrer la rugosité dans les équations de la lubrification élastohydrodynamique. Nous justifions ainsi le choix d'une approche déterministe pour notre étude.Les hypothèses et les méthodes utilisées par notre modèle étant ainsi précisées, nous présentons alors les résultats concernant les deux objectifs cités précédemment.

Keywords

Micro-elastohydrodynamic lubricationroughnessdeterministicstochasticpure slidingLubrification micro-élastohydrodynamiquerugositédéterministestochastiqueglissement pur
Type
Research Article
Information
Mechanics & Industry , Volume 5 , Issue 6 , November 2004 , pp. 677 - 684
Copyright
© AFM, EDP Sciences, 2004

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