Abstract
In the current work a numerical elastohydrodynamic simulation is conducted for a one-dimensional step bearing. The effect of elastic deformation of the bounding surfaces and piezoviscous effect were simultaneously solved. The present numerical results indicate that the elastic deformation less than 200 nm was responsible for the film formation when the film thickness was small. The small elastic deformation changed the film shape over the contact area with decreasing the film thickness. A divergent film shape in the step zone appeared while a convergent film shape was produced because of the elastic deformation. The step film shape was still remained, which played an important role in the pressure generation. Such a film shape produced the delay in pressure generation in the step zone, i.e. the starting point of the pressure generation was located around the centre of the contact area. The delay in pressure generation resulted in significant reduction in load capacity.
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