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Journal Articles Tribology International Year : 2006

Transient increase of film thickness in micro-textured EHL contacts

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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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Dates and versions

ujm-00106745 , version 1 (16-10-2006)

Identifiers

  • HAL Id : ujm-00106745 , version 1

Cite

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