The pressure fluctuations around an ellipsoidal asperity tip at the inlet region of an elastohydrodynamic contact is determined by solving a perturbed Reynolds equation assuming that the asperity shape is unaffected by the perturbed pressure. Results are presented as the amplitude of the perturbed pressure as a function of ellipticity ratio, maximum Hertzian pressure, nominal EHD film thickness, asperity size, asperity height, and pressure viscosity coefficient. For the case of simple sliding between a smooth surface and a stationary asperity, a comparison is also made between the results for large ellipticity ratios and the pressure fluctuations obtained by using a previous line contact EHD analysis  for a two-dimensional asperity ridge. The agreement is found to be close for moderate Hertzian pressure and relatively thick EHD film thickness.
Pressure Perturbation in EHD Contacts Due to an Ellipsoidal Asperity
L. S. H. Chow,
L. S. H. Chow
Argonne National Laboratory, Argonne, Ill.
H. S. Cheng
Department of Mechanical Engineering, Northwestern University, Evanston, Ill.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Chow, L. S. H., and Cheng, H. S. (January 1, 1976). "Pressure Perturbation in EHD Contacts Due to an Ellipsoidal Asperity." ASME. J. of Lubrication Tech. January 1976; 98(1): 8–15. https://doi.org/10.1115/1.3452787
Download citation file:
- Ris (Zotero)
- Reference Manager
Get Email Alerts
Improving the Tribological Properties of Al-7Fe-5Ni Alloys via Friction Stir Processing
J. Tribol (December 2019)