The influence of mean contact pressure on the friction coefficient of a traction fluid at high pressure

Abstract

A new ball impact apparatus has been developed for measuring the friction coefficients of solidified lubricants under very high pressures. Results obtained for Santotrac 50 showed a decrease in friction coefficient with increasing mean contact pressure and showed good consistency with values reported elsewhere from several different forms of apparatus.

Keywords

limiting shear stress lubricated impact bouncing ball experiment elastohydrodynamic lubrication

Get full access to this article

View all access options for this article.

References

Smith

F. W.

Lubricant behavior in concentrated contact-some rheological problems. ASLE Trans., 1960, 3, 18–25.

Johnson

K. L.

Cameron

Shear behaviour of elastohydrodynamic oil films at high rolling contact pressures. Proc. Instn Mech. Engrs, 1967, 182(1), No. 14, 307–319.

Jacobson

On the lubrication of heavily loaded spherical surfaces considering surface deformations and solidification of the lubricant. Acta Polytechnica Scandinavica, Mechanical Engineering Series 54, 1970.

Johnson

K. L.

Roberts

A. D.

Observation of viscoelastic behaviour of an elastohydrodynamic lubricant film. Proc. R. Soc. Lond. A, 1974, 337, 217–242.

Alsaad

Bair

Sanborn

D. M.

Winer

W. O.

Glass transitions in lubricants: Its relation to elastohydrodynamic lubrication (EHD). Trans. ASME, J. Lubric. Technol., 1978, 100, 404–417.

Bair

Winer

W. O.

Shear strength measurements of lubricants at high pressure. Trans. ASME, J. Lubric. Technol., 1979, 101, 251–257.

Jacobson

A high pressure-short time shear strength analyzer for lubricants. Trans. ASME, J. Tribology, 1985, 107, 220–223.

Höglund

Jacobson

Experimental investigation of the shear strength of lubricants subjected to high pressure and temperature. Trans. ASME, J. Tribology, 1986, 108, 571–578.

Evans

C. R.

Johnson

K. L.

The rheological properties of elastohydrodynamic lubricants. Proc. Instn Mech. Engrs, Part C, Journal of Mechanical Engineering Science, 1986, 200(C5), 303–312.

10.

Ramesh

K. T.

On the rheology of a traction fluid. Trans. ASME, J. Tribology, 1989, 111, 614–619.

11.

Höglund

Relationship between lubricant shear strength and chemical composition of the base oil. Wear, 1989, 130, 213–224.

12.

Dowson

Wang

An analysis of the normal bouncing of a solid elastic ball on an oily plate. Wear, 1994, 179, 29–37.

13.

Dowson

Workel

M. F.

Canelo-Quintero

May

Development of an apparatus for the direct measurement of traction coefficients for lubricants; preliminary measurements from a bouncing ball apparatus. In Proceedings of 25th Leeds-Lyon Symposium on Tribology (Eds Dowson

), pp. 779–788 (Elsevier Science, Amsterdam).

14.

Bair

Winer

W. O.

Experimental investigation of the shear strength of lubricants subjected to high pressure and temperature. Trans. ASME, J. Tribology, 1990, 112, 744–748.