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Tribology Letters
Erschienen in: Tribology Letters 2/2007

01.11.2007 | Original Paper

A Quantitative Solution for the Full Shear-Thinning EHL Point Contact Problem Including Traction

verfasst von: Yuchuan Liu, Q. Jane Wang, Scott Bair, Philippe Vergne

Erschienen in: Tribology Letters | Ausgabe 2/2007

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Abstract

We present a realistic elastohydrodynamic lubrication (EHL) simulation in point contact using a Carreau-like model for the shear-thinning response and the Doolittle-Tait free-volume viscosity model for the piezoviscous response. The liquid lubricant modeled is a high-viscosity polyalphaolefin which has been shown by high-pressure viscometry to possess a relatively low threshold for shear-thinning as a single-component liquid lubricant. As a result, the measured EHL film thickness is about one-half of the Newtonian prediction. We derived and numerically solved the two-dimensional generalized Reynolds equation for the modified Carreau model based on Greenwood. In this simulation, viscosity was not treated as an adjustable parameter; the models used for the pressure and shear dependence of viscosity were obtained entirely from viscometer measurements. Truly remarkable agreement is found in the comparisons of simulation and experiment for traction coefficient and for film thickness in both pure rolling and sliding cases.
Vorheriger Artikel Changes in Friction Properties of Monolayer Lubricant Films Induced by Development of Molecules’ Bonding
Nächster Artikel Friction Study of a Ni Nanodot-patterned Surface

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Metadaten
Titel
A Quantitative Solution for the Full Shear-Thinning EHL Point Contact Problem Including Traction
verfasst von
Yuchuan Liu
Q. Jane Wang
Scott Bair
Philippe Vergne
Publikationsdatum
01.11.2007
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 2/2007
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-007-9262-5

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