Skip to Main content Skip to Navigation
Journal articles

Transient increase of film thickness in micro-textured EHL contacts

Abstract : In this paper, the transient lubrication phenomena induced by isolated circular micro-cavities passing through an EHL point contact are analysed. A 52 100 steel ball was micro-machined using a femtosecond pulse laser, and is tested with an EHL tribometer. The experiments are simulated numerically with a 2D-multigrid solver. Under rolling–sliding conditions, the film thickness distribution is modified, and two opposite effects are observed. Deep micro-cavities induce an oil film decrease. On the contrary, a shallow micro-cavity locally generates a large increase in the film thickness. When the ball surface is the slowest, the propagation velocity of the local oil film reinforcement increases.
Complete list of metadata
Contributor : Christophe Donnet Connect in order to contact the contributor
Submitted on : Monday, October 16, 2006 - 11:11:03 AM
Last modification on : Wednesday, August 31, 2022 - 5:01:03 PM


  • HAL Id : ujm-00106745, version 1


L. Mourier, D. Mazuyer, A.A. Lubrecht, C. Donnet. Transient increase of film thickness in micro-textured EHL contacts. Tribology International, Elsevier, 2006, 39, pp.1745-1756. ⟨ujm-00106745⟩



Record views