Results 261 to 270 of about 55,265 (308)
Some of the next articles are maybe not open access.
Mixed lubrication — an overview
Lubrication Science, 1997AbstractThe regime known as ‘mixed’ lubrication lies between those of hydrodynamic and elastohydrodynamic. This paper reviews work on this subject, in order to recognise the key areas of progress, and of ignorance. Film thickness and surface roughness are discussed, to conclude that below certain values of λ, there are limitations to earlier models ...
openaire +1 more source
Dynamic Adsorption in Mixed Lubrication
Tribology Transactions, 1989The effect of additive adsorption on friction and wear of sliding contacts under mixed lubrication conditions has been analysed. Dynamic aspects of adsorption are taken into account by relating desorption in the contact zone to increased temperature rather than to some mechanical action.
A. K. Van Helden +2 more
openaire +1 more source
Mixed Lubrication and Lubricated Wear
1993This review attempts to update our current analytical understanding of the macro-scale lubrication variables such as the average film thickness, lubricant and contact pressures, shear stress, and surface temperature, as well as the micro-scale random variables induced by the randomly distributed asperity contacts.
openaire +1 more source
Mixed Lubrication of “Parallel” Plane Sliders
Journal of Applied Mechanics, 1972A theoretical model for the friction coefficient indicates two critical speeds of sliding. The lower critical speed corresponds to a change-over from boundary to mixed lubrication conditions, the higher critical speed a transition to full fluid-film lubrication at angles of inclination less than 0.01 deg.
D. S. Bedi, M. J. Hillier
openaire +1 more source
Mixed rheologies in elastohydrodynamic lubrication
Industrial Lubrication and Tribology, 2004This paper studies elastohydrodynamic lubrication (EHL) of line contacts for the slide‐roll ratios 0‐2 based on the assumptions of interfacial shear strength and interfacial slip. It is shown that the viscoelastic, viscoplastic and non‐continuum fluids distribute from the inlet zone to the Hertzian contact zone in order for a given operating condition ...
openaire +1 more source
Proceedings of the Institution of Mechanical Engineers, 1972
The phenomena observed when a lubricated contact or bearing is operating under mixed lubrication conditions are assumed to arise from an interaction of the surface asperities or roughness as well as from hydro-dynamic action of the sliding surfaces. It is shown how one of the previously published stochastic models of hydrodynamic lubrication can be ...
openaire +1 more source
The phenomena observed when a lubricated contact or bearing is operating under mixed lubrication conditions are assumed to arise from an interaction of the surface asperities or roughness as well as from hydro-dynamic action of the sliding surfaces. It is shown how one of the previously published stochastic models of hydrodynamic lubrication can be ...
openaire +1 more source
2016
La lubrification mixte intervient dans un contact travaillant en présence d’un lubrifiant liquide, mais dans les conditions particulières de fonctionnement qui conduisent à l’absence d’une séparation complète des 2 pièces en regard, par le film lubrifiant.
Robbe-Valloire, Francois, Progri, Robert
openaire +1 more source
La lubrification mixte intervient dans un contact travaillant en présence d’un lubrifiant liquide, mais dans les conditions particulières de fonctionnement qui conduisent à l’absence d’une séparation complète des 2 pièces en regard, par le film lubrifiant.
Robbe-Valloire, Francois, Progri, Robert
openaire +1 more source
Friction in Highly Loaded Mixed Lubricated Point Contacts
Tribology Transactions, 2009A model that treats both the EHL and the asperity contact friction in lubricated rough circular contact is presented in this article. In this approach, the well-known Greenwood and Williamson elastic contact model describing dry asperity contact is combined with an isothermal Eyring EHL model of the hydrodynamic film.
Liu, Qiang +4 more
openaire +1 more source
Mixed Mechanism of Lubrication by Lipid Bilayer Stacks
Langmuir, 2015Although the key role of lipid bilayer stacks in biological lubrication is generally accepted, the mechanisms underlying their extreme efficiency remain elusive. In this article, we report molecular dynamics simulations of lipid bilayer stacks undergoing load and shear.
Botan, Alexandru +3 more
openaire +3 more sources
Transition Between Mixed Lubrication and Elastohydrodynamic Lubrication with Randomly Rough Surfaces
Tribology Letters, 2016We are interested in understanding the effect of roughness on friction in mixed lubrication (ML) and elastohydrodynamic lubrication (EHL), notably in the case of realistic surfaces. Rolling–sliding experiments in piezoviscous base oil are conducted between rough steels obtained with different machining, polishing and coating processes in order to ...
Julien Bonaventure +2 more
openaire +1 more source