Results 161 to 170 of about 655 (212)

Tribological Behavior of Aqueous Copolymer Lubricant in Mixed Lubrication Regime

ACS Applied Materials & Interfaces, 2016
Although a number of experiments have been attempted to investigate the lubrication of aqueous copolymer lubricant, which is applied widely in metalworking operations, a comprehensive theoretical investigation at atomistic level is still lacking. This study addresses the influence of loading pressure and copolymer concentration on the structural ...
Ta, Thi Dinh, Tieu, A Kiet, Zhu, Hongtao, Zhu, Qiang, Kosasih, Prabouno B, Zhang, Jie, Deng, Guanyu   +6 more
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Enhanced Lubricity in Mixed Alkanethiol Monolayers

The Journal of Physical Chemistry B, 2005
The frictional properties of two-component mixed alkanethiol monolayers were investigated with frictional force microscopy. With large chain length differences, the two types of molecules segregated into large islands and reveal similar frictional properties as those of single-component monolayers.
Zuo, L., Xiong, Y., Xie, XC, Xiao, XD
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Friction Reduction in Mixed Lubrication

Tribology Letters, 2007
Minimization of frictional losses in the drivetrain of heavy-duty vehicles is important from both consumer satisfaction and environmental perspectives. Approaches to friction reduction in these components can be evaluated using simulation-based investigations.
Ashlie Martini, Dong Zhu, Qian Wang
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Mixed Lubrication and Lubricated Wear

1993
This 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.
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Mixed Lubrication of Strip Rolling

Tribology Transactions, 1994
An analytical model for strip rolling operating in the mixed regime is developed. The model combines analysis for the influence of bulk plastic deformation on the effective hardness of the strip asperities with an approach to allow for the influence of roughness on lubricant flow. An approximate correction for thermal effects is also included.
Shen Sheu, William R. D. Wilson
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A Theory of Mixed Lubrication

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 ...
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Chemical Films and Mixed Lubrication

A S L E Transactions, 1983
This paper relates studies of film behavior in mixed lubrication in a concentrated contact. In the simulator, 52100 steel specimens and TCP in hexadecane as lubricant are used. When the pure EHL regime is studied, no solid film is formed on surfaces, but within the boundary lubrication regime, the chemical decomposition of the additive contributes to a
J. M. Georges, A. Tonck, G. Meille, M. Belin   +3 more
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Reduced description of mixed lubrication

Tribology International, 2008
Modelling friction and wear between rough and lubricated surfaces is an important problem of modern technologies. The complexity of the problem is in the necessity of simultaneously solving for elastic deformations of contacting bodies and fluid flow between the bodies.
Thomas Geike, Valentin L. Popov
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Dynamic Adsorption in Mixed Lubrication

Tribology Transactions, 1989
The 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, P. H. Vroegop, J. J. M. Jongh   +2 more
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Mixed rheologies in elastohydrodynamic lubrication

Industrial Lubrication and Tribology, 2004
This 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 ...
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