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EFFECTS OF COUPLE STRESS AND SURFACE ROUGHNESS OF FINITE JOURNAL BEARING IN SQUEEZE FILM LUBRICATION

In this paper, a theoretical study of combined effects of surface roughness and couple stresses on squeeze film lubrication of finite journal bearings is analyzed. The modified Reynolds Equations accounting for the couple stresses and surface roughness using Deterministic Theory are mathematically derived. It is applied to study the effects of roughness and couple stresses in finite journal bearing using Rapid - Narang technique. From the numerical computations of the results, it is found that, the effect of couple stresses is to increase the load carrying capacity. A parameter characteristics different type of roughness is identified. It is observed that in case of transverse roughness pattern the load capacity increases where as it decreases for longitudinal roughness pattern.