A Porous Media Model for Thin Film Lubrication-Reference-Cited by-同舟云学术

A Porous Media Model for Thin Film Lubrication

Published:1995-01-01 Issue:1 Volume:117 Page:16-21
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Tichy J. A.¹

Affiliation:

1. Rensselaer Polytechnic Institute, Department of Mechanical Engineering, Aeronautical Engineering, and Mechanics, Troy, NY 12180-3590

Abstract

A rheological model has been developed which can be applied to boundary lubrication. The model is applicable to thin films in which the molecular length scale is the same order as the film thickness. The micro structure is simulated by porous layers attached to the contact surfaces. The model contains three material properties: (1) viscosity, (2) the thickness of the porous layer, and (3) a porosity parameter. A modified Reynolds equation is developed. Behavior in two types of contacts is calculated: squeezing flow between crossed cylinders (Chan and Horn’s, 1985 drainage experiment) and a one-dimensional converging wedge contact. The effect of the layer thickness parameter is to increase the load and reduce the friction coefficient. Increasing the porosity parameter value tends to reduce the magnitude of the load increase.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/117/1/16/5606370/16_1.pdf

Reference7 articles.

1. Chan D. Y. C. , and HornR. G., 1985, “The Drainage of Thin Liquid Films between Solid Surfaces,” Journal of Chemical Physics, Vol. 83, No. 10, pp. 5311–5324.

2. Czichos, H., 1978, Tribology, Elsevier Scientific Publishing Co., Amsterdam, pp. 156–166.

3. Happel, J., and Brenner, H., 1965, Low Reynolds Number Hydrodynamics, Prentice-Hall, Englewood Cliffs, NJ.

4. Pinkus, O., and Sternlicht, B., 1961, Theory of Hydrodynamic Lubrication, McGraw-Hill, New York.

5. Shukla J. B. , 1978, “A New Theory of Lubrication for Rough Surfaces,” Wear, Vol. 49, pp. 33–42.

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