Distribution of Hydrodynamic Pressure on Counterformel Line Contacts

The pressure distribution of counterformel cylinders was measured. Within the small zone of contact it was possible to obtain pressure curves which were correct both qualitatively and quantitatively. Integration of the pressure gave the hydrodynamic borne load. This load agreed with the applied load in the region of fluid friction. Under conditions of mixed friction, a steady decrease in the developed pressures was observed. There was no sudden breakdown of pressure. The following effects were investigated: speed, load, viscosity, curvature, roughness, and lubricant. The highest measured pressure was 60,000 lbs per square inch. This pressure exceeded the maximum of the hertzian distribution.