Traction Plateau and the Proper Evaluation of the Limiting Shear Stress for Friction Modelling in Elastohydrodynamic Lubrication
Year: 2026
Type: article
Abstract: There is renewed interest in the phenomenon of limiting shear stress (LSS); an essential component of friction modeling in elastohydrodynamic lubrication (EHL), perhaps because it is thought to be detectable and measurable by a simple friction measurement. In a sense, this is true, but only with knowledge of the viscosity under the conditions of the friction data. The LSS dependence on pressure may be extracted from EHL traction only if the LSS is operating over nearly all the contact area. Otherwise, the value of the LSS will be understated. Recent attempts have utilized contact pressures that are insufficient to achieve the LSS over enough of the contact, and the resulting pressure dependence erroneously appears to make the LSS go to zero at a large positive pressure. The current work discusses precautionary measures for a proper extraction of LSS from traction measurements, to be used in EHL friction modeling.
Source: Lubricants
Authors: Scott Bair, Wassim Habchi
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W7222096378