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TECHNICAL PAPERS

Lubrication of Rough Surfaces by a Boundary Film-Forming Viscosity Modifier Additive

[+] Author and Article Information
R. P. Glovnea, A. V. Olver, H. A. Spikes

Tribology Section, Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom

J. Tribol 127(1), 223-229 (Feb 07, 2005) (7 pages) doi:10.1115/1.1828069 History: Received December 09, 2003; Revised June 08, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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References

Standard methods for analysis and testing of petroleum and related products 1992, Vol. 1, p. 226.
Selby,  T. W., 1959, “The non-Newtonian characteristics of lubricating oils,” ASLE Trans., 1, pp. 68–81.
McMillan, M. L. and Murphy, C. K. (1978), “Temporary viscosity loss and its relationship to journal bearing performance,” SAE Technical Papers, 780374.
Spikes,  H. A., Cann,  P. M., Coy,  R. C., and Wardle,  R. W. M., 1990, “An ‘in lubro’ study of VI Improvers in EHD contacts,” Int. J. Phys. Distribut. Logist. Manage., 3, pp. 45–62.
Smeeth,  M., Spikes,  H. A., and Gunsel,  S., 1996, “The formation of viscous surface films by polymer solutions: Boundary or elastohydrodynamic lubrication?” Tribol. Trans., 39, pp. 720–725.
Smeeth,  M., Spikes,  H. A., and Gunsel,  S., 1996, “Boundary film formation by viscosity index improvers,” Tribol. Trans., 39, pp. 726–734.
Guangteng,  G., Smeeth,  M., Cann,  P. M., and Spikes,  H. A., 1996, “The measurement and modelling of the boundary film properties of polymeric lubricant additives,” Proc. Inst. Mech. Eng., Part J: J. Eng. Tribol., 210, pp. 1–15.
Smeeth, M., Gunsel, S., and Spikes, H. A. 1996 “Friction and wear reduction by boundary film-forming viscosity index improvers,” SAE Technical Paper, SAE 962037.
Dardin, A., Muller, M., Topolovec-Miklozic, K., and Spikes, H. A., 2003, “Influence of polyalkylmethacrylate viscosity index improvers on the efficiency of lubricants,” presented at JSAE, Yokohama, JSAE 20030220, SAE 2003-01-1967.
Topolovec-Miklozic, K., and Spikes, H. A., 2003, “Application of atomic force microscopy to the study of lubricant additive films,” in ASME Trans., J. of Tribology (to be published).
Guangteng,  G., Cann,  P. M., Olver,  A. V., and Spikes,  H. A., 2000, “Lubricant film thickness in rough surface, mixed elastohydrodynamic contact,” Trans. ASME, J. Tribol., 122, pp. 65–76.
Johnston,  G. J., Wayte,  R. C., and Spikes,  H. A., 1991, “The measurement and study of very thin lubricant films in concentrated contacts,” Tribol. Trans., 34, pp. 187–194.
Cann,  P. M., Hutchinson,  J., and Spikes,  H. A., 1996, “The development of a Spacer Layer Imaging Method (SLIM) for mapping elastohydrodynamic contacts,” Tribol. Trans., 39, pp. 915–921.
Glovnea,  R. P., Choo,  J. W., Olver,  A. V., and Spikes,  H. A, 2003, “Compression of a single transverse ridge in a circular elastohydrodynamic contact,” Trans. ASME, J. Tribol., 125, pp. 275–282.
Hirst,  W., and Hollander,  A. E., 1974, “Surface Finish and Damage in Sliding,” Proc. R. Soc. London, Ser. A, 337(1610), pp. 379–394.
Whitehouse,  D. J., and Archard,  J. F., 1970, “The Properties of Random Surfaces of Significance in their Contact,” Proc. R. Soc. London, Ser. A, 316(1524), pp. 97–121.
Greenwood,  J. A., and Williamson,  J. B. P., 1966, “Contact of Nominally Flat Surfaces,” Proc. R. Soc. London, Ser. A, 295(1442), pp. 300–319.
M. Smeeth, “The Behaviour of Viscosity Index Improvers in Lubricated Contacts,” Ph.D. thesis, University of London, 1998.
Hamrock, B. J., and Dowson, D., 1981, Ball Bearing Lubrication: The Elastohydrodynamics of Elliptical Contacts, Wiley, NY.

Figures

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Film thickness distribution in rough steel ball contact lubricated by base oil and polymer solution at two entrainment speeds
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Variation of coefficient of friction with entrainment speed at 50% slide-roll-ratio for smooth steel disk surface
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Variation of coefficient of friction with entrainment speed at 50% slide-roll-ratio for rough steel disk surface
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Minimum film thickness for the base oil and polymer solution with a steel ball having model roughness
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Comparison of average film thickness for base oil and polymer solution with a steel ball having random roughness
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Optical interference image of lubricated, steel ball contact having random roughness (the arrow indicates the rolling direction)
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Film-forming properties of base oil and polymer solution in pure rolling contact with a model roughness ball (♦ base oil, □ OCP-D solution)
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Film-forming properties of base oil and polymer solution in pure rolling contact with chromium-plated balls
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Film-forming properties of base oil and polymer solution in pure rolling contact with steel balls
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Schematic diagram of the friction measurement rig
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Map of random rough ball surface measured with an optical profiler
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Map of model rough ball surface measured with an optical profiler

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