An analytical friction model for point contacts subject to boundary and mixed elastohydrodynamic lubrication

An analytical EHL model suitable for highly loaded point contacts operating in mixed and boundary regimes of lubrication is presented. The results are compared and validated with the experimental measurements of friction coefficient from an MTM tribometer. Measurements are carried out upon a PAO40 o...

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Bibliographic Details
Published inTribology international Vol. 196; p. 109699
Main Authors Simpson, Matthew, Rahmani, Ramin, Dolatabadi, Nader, Morris, Nick, Jones, David, Craig, Christopher
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2024
Subjects
Analytical model
EHL Traction
Friction coefficient
High temperature
Mixed regime
MTM
PAO lubricant
Analytical model
PAO lubricant
MTM
Friction coefficient
High temperature
EHL Traction
Mixed regime
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Summary:An analytical EHL model suitable for highly loaded point contacts operating in mixed and boundary regimes of lubrication is presented. The results are compared and validated with the experimental measurements of friction coefficient from an MTM tribometer. Measurements are carried out upon a PAO40 oil at medium to high temperatures. In general, a good agreement in trend and magnitude over a wide range of operating conditions is observed. Both the experimental findings and the model predictions show an inverse relationship between friction and contact load in mixed and boundary regimes of lubrication, an effect not hitherto reported in literature.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2024.109699