Summary Friction between sliding surfaces decreases as the velocity of sliding increases (‘falling friction’). This paper investigates the velocity-dependent friction relationships in non-Hertzian models of wheel-rail rolling contact. The effect of falling friction on tangential stress distribution and slip is examined. In otherwise steady rolling with constant creep, falling friction introduces a stick-slip oscillation to the trailing edge of the contact. This oscillation is increasingly unstable with increasing creep. The stick-slip behaviour at the trailing edge leads to sudden changes in the tangential stress distribution in the stick zone, including intermittent slip at the leading edge of the contact.


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    Title :

    An Investigation of Velocity-Dependent Friction in Wheel-Rail Rolling Contact


    Contributors:


    Publication date :

    2012-01-01


    Size :

    9 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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