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.
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https://hal-ujm.archives-ouvertes.fr/ujm-00106745
Contributor : Christophe Donnet <>
Submitted on : Monday, October 16, 2006 - 11:11:03 AM
Last modification on : Tuesday, August 20, 2019 - 3:52:17 PM

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  • HAL Id : ujm-00106745, version 1

Citation

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⟩

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