A simple experimental technique is developed that allows the pressures and stresses predicted by EHL analyses to be checked. A soft, rough steel disc is run, under controlled conditions, against a harder, smooth counterface. The pressures generated cause the soft disc to plastically deform. Once deformation ceases the residual profile may be measured and used as input to an EHL solver. The calculated pressures are then used to determine the stress distributions as the rough surface passes through the conjunction. After allowing for the build up of residual stress the maximum von Mises’ stress should be equal to the yield strength of the disc. This provides an accurate, quantitative check on the theoretical values.
Issue Section:
Technical Papers
1.
Venner, C. H., and Lubrecht, A. A., 2000, Multilevel Methods in Lubrication, Elsevier Science, Amsterdam, Oxford.
2.
Johnson
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, Wayte
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, 1991
, “The Measurement and Study of Very Thin Lubricant Films in Concentrated Contacts
,” Tribol. Trans.
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.3.
Hamilton
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, and Moore
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, 1971
, “Deformation and Pressure in an Elastohydrodynamic Contact
,” Proc. R. Soc. London, Ser. A
322
, pp. 313
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.4.
Hooke, C. J., and Li, K. Y., 1999, “An Experimental Study of the Relationship Between Surface Roughness and Stress in EHL Contacts,” Proc. 26th Leeds-Lyon Symposium on Tribology.
5.
Li, K. Y., and Hooke, C. J., 2000, “A Study of the Relationship Between Single Feature Transverse Roughness and Stress in EHL Contacts,” Proc. International Tribology Conference, Nagasaki.
6.
Symonds
, P. S.
, 1951
, “Shakedown in Continuous Media
,” ASME J. Appl. Mech.
, 18
, pp. 85
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.7.
Johnson, K. L., 1985, Contact Mechanics, Cambridge University Press, Cambridge.
8.
Love, A. E., 1927, A Treatise on the Mathematical Theory of Elasticity, Fourth ed., Cambridge University Press, Cambridge.
Copyright © 2002
by ASME
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