Ultrathin film formation under combined effect of surface roughness and surface force for elastohydrodynamic lubrication of point contact problems
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 15 April 2022
Issue publication date: 23 June 2022
Abstract
Purpose
The purpose of this study is to investigate the combined effect of surface force, solvation and Van der Waals forces and surface topography parameters of amplitude and wavelength on the formation of ultrathin films for elastohydrodynamic lubrication of point contact problems.
Design/methodology/approach
The Newton–Raphson technique is used to simultaneously solve the Reynolds’ film thickness including surface roughness and elastic deformation, surface force of solvation and Van der Waals forces and load balance equations. Different values of surface amplitude and wavelength were simulated in addition to the load variation.
Findings
The simulation results revealed that roughness effects are important as the film thickness decreases. The oscillation in the pressure and film thickness is due to the combined action of the solvation force and surface topography parameters. The limiting values of the surface topography parameters of the amplitude and wavelength varied and depended on the load. For different values of wavelength and load, amplitude values up to 0.25 nm have no effect on ultrathin film formation.
Originality/value
The combined effect of the surface force and surface roughness on the formation of ultrathin films was evaluated for elastohydrodynamic lubrication of point contact problems under different operating conditions of load and surface topography parameters of amplitude and wavelength. The limited surface topography parameters of the amplitude and wavelength are shown and analyzed.
Keywords
Citation
Abd Alsamieh, M. (2022), "Ultrathin film formation under combined effect of surface roughness and surface force for elastohydrodynamic lubrication of point contact problems", Industrial Lubrication and Tribology, Vol. 74 No. 6, pp. 597-608. https://doi.org/10.1108/ILT-01-2022-0013
Publisher
:Emerald Publishing Limited
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