Abstract: The present paper studies on
micro-elastohydrodynamic lubrication problems with real rough
surfaces in line and point contacts. Random roughness samples
are collected from real processed surfaces. Problems with
different loads and roughness amplitudes are calculated
numerically. From the calculation solutions it is found that
pressure peaks and valleys induced by roughness flatten rough
surfaces on line and in point contacts because the velocity item
in Reynolds equation plays a major role under the heavy loads.
Therefore, though pressure distributions become much rough, film
shapes are smooth. It is also found that the increment of the
maximum pressure is nearly proportional to the maximum amplitude
of roughness. And the minimum and the average film thicknesses
change slightly with the variation of rouhgness amplitudes.
Key words:
Real roughness Pressure and film Elastohydrodynamic lubrication
* This project is supported by National Natural Science Foundation
of China. Manuscript received on July 5, 1992
|