The behavior of the thermal elastohydrodynamic lubrication film in rough rolling/sliding line contacts at dynamic loads is investigated numerically. The lubricant is assumed to be a mixture of Newtonian and Ree-Eyring fluids. The results show that the maximum pressure in the contact region undergoes a noteworthy change with time due to dynamic loading and the effect of moving surface roughness. The variation of minimum film thickness and coefficient of friction with the composition of the lubricant is found to be dependent upon the reference viscosity ratio. The superposition of the effects of moving surface roughness and dynamic loading is shown to determine the behavior of time dependent film thickness and coefficient of friction.

Issue Section:
Technical Papers
Keywords:
lubrication, hydrodynamics, mechanical contact, sliding friction, rolling friction, rough surfaces, elastic deformation
Topics:
Film thickness, Fluids, Friction, Lubricants, Pressure, Stress, Surface roughness, Temperature, Viscosity, Dynamic testing (Materials), Non-Newtonian fluids
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