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This paper describes the influence of axle load (contact pressure) on the adhesion coefficient of wheel and rail in accordance with the running speed of a vehicle, the surface roughness of wheel/rail and wet conditions created by rain, snow, etc. The adhesion characteristics were investigated by theoretical analysis with a numerical model adopting the Elasto-Hydrodynamic Lubrication (EHL) theory and...
This paper describes how to improve the prediction method of the adhesion coefficient by means of the experimentally estimated boundary friction coefficient obtained by two kinds of twin-disc rolling contact machines and the ratio of real contact area to nominal contact area (RCA/NCA) obtained by ultrasonic measurement. The previous prediction method that the authors had already proposed in the last...
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