Surface roughness effects in elastohydrodynamic lubrication: a review with contributions

GE Morales-Espejel - Proceedings of the Institution of …, 2014 - journals.sagepub.com
Modern machine elements are required to work under increasingly severe conditions
(thinner lubricating films, higher temperatures, less lubricant, etc.). Therefore, in heavily …

[HTML][HTML] Mapping of the lubrication regimes in rough surface EHL contacts

J Hansen, M Björling, R Larsson - Tribology International, 2019 - Elsevier
Understanding film formation in rough surface elastohydrodynamically lubricated (EHL)
contacts have been an ongoing pursuit in lubrication science for more than half a century …

Prediction of the Stribeck curve under full-film Elastohydrodynamic Lubrication

Y Zhang, N Biboulet, CH Venner, AA Lubrecht - Tribology International, 2020 - Elsevier
The Stribeck curve shows the friction coefficient as a function of speed, viscosity and load.
The viscosity times speed over load parameter can be interpreted as a film thickness. The …

Lubrication in soft rough contacts: A novel homogenized approach. Part I-Theory

M Scaraggi, G Carbone, BNJ Persson, D Dini - Soft Matter, 2011 - pubs.rsc.org
We study the lubricated steady sliding contact between rough surfaces of (elastically) soft
solids. A novel mean field theory of mixed lubrication is presented, which takes into account …

Effect of surface roughness on lubricant film breakdown and transition from EHL to mixed lubrication

I Krupka, P Sperka, M Hartl - Tribology International, 2016 - Elsevier
The ability of elastohydrodynamically lubricated (EHL) contacts to separate surfaces
represents essential design requirement ensuring long life and low friction of machine …

Study on the relationship between the tribological properties and oxidation degree of graphene derivatives in O/W emulsion

Y Wu, T Sun, Z He, X Zeng, T Ren, E de Vries… - Tribology …, 2021 - Elsevier
Graphene oxide (GO) underwent a single and double-side modification with octadecylamine
(ODA) to MGO1 and MGO2 respectively. MGO1 and MGO2 were incorporated into the O/W …

Novel in-situ observation of the grease constituents in elastohydrodynamic contacts by fluorescence microscopy

D Kostal, M Okal, J Fryza, I Krupka, M Hartl - Tribology Letters, 2022 - Springer
Grease is important lubricant for ball bearings as it is used much more often than oil.
However, mechanism of the lubrication is not completely clear, especially concerning the …

On roughness attenuation in elastohydrodynamic lubricated line and circular contacts

W Habchi - Proceedings of the Institution of Mechanical …, 2023 - journals.sagepub.com
The commonly accepted “roughness attenuation” theory offers a description of the
deformation of surface features as they travel through elastohydrodynamic lubricated …

Experimental and numerical study of the effect of raceway waviness on the oil film in thrust ball bearings

Z Ren, J Wang, F Guo, AA Lubrecht - Tribology International, 2014 - Elsevier
Using a custom-made optical interferometer, the waviness values on the raceway of the
washer of two thrust ball bearings are obtained by applying the Hertzian contact theory. The …

Amplitude reduction in EHL line contacts under rolling sliding conditions

J Wang, CH Venner, AA Lubrecht - Tribology international, 2011 - Elsevier
Surface roughness plays an important role in the performance of highly loaded
elastohydrodynamically lubricated contacts. As the pressures are very high, each of the …