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Tribology Letters
Published in: Tribology Letters 3/2014

01-12-2014 | Original Paper

Localized Boundary Effect on Elastohydrodynamic Lubricated Film Shape

Authors: Z. Fu, P. L. Wong, F. Guo

Published in: Tribology Letters | Issue 3/2014

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Abstract

The study aimed to determine the formation of an adsorption film at elastohydrodynamic lubricated (EHL) contacts and its effects on EHL film shape and friction. Experiments were conducted on an optical EHL test rig with surfaces of different surface energies. A new type of “abnormal” EHL film shape characterized with three dimples in the inlet of the contact was obtained in pure ball sliding experiments with long-chain polybutene. The adsorption layer was inferred to be the main cause for the “tri-dimple” phenomenon. The “tri-dimple” formation was examined. Under a fixed speed, a single inlet dimple gradually broke into three dimples with increasing number of ball rotation, and it happened with slight increase in friction force. Three zones, namely a central and two lateral zones, of the contact were classified and characterized with different levels of influence on the adsorption layer.
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Metadata
Title
Localized Boundary Effect on Elastohydrodynamic Lubricated Film Shape
Authors
Z. Fu
P. L. Wong
F. Guo
Publication date
01-12-2014
Publisher
Springer US
Published in
Tribology Letters / Issue 3/2014
Print ISSN: 1023-8883
Electronic ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-014-0424-y

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