The effect of initial rail surface irregularities on promoting further surface degradation is investigated. The study concerns rolling contact fatigue formation, in particular in the form of the so-called squats. The impact of surface irregularities in the form of dimples is quantified by peak magnitudes of dynamic contact stresses and contact forces. To this end simulations of two-dimensional (later extended to three-dimensional) vertical dynamic vehicle–track interaction are employed. The most influencing parameters are identified. It is shown that even very shallow dimples might have a large impact on local contact stresses. Peak magnitudes of contact forces and stresses due to the influence of rail dimples are shown to exceed those due to rail corrugation.


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    Title :

    The influence of rail surface irregularities on contact forces and local stresses


    Contributors:

    Published in:

    Vehicle System Dynamics ; 53 , 1 ; 68-87


    Publication date :

    2015


    Size :

    20 Seiten, 15 Bilder, 4 Tabellen, 26 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    The influence of rail surface irregularities on contact forces and local stresses

    Andersson, Robin / Torstensson, Peter T. / Kabo, Elena et al. | Taylor & Francis Verlag | 2015


    The influence of rail surface irregularities on contact forces and local stresses

    Andersson,R. / Torstensson,P.T. / Kabo,E. et al. | Automotive engineering | 2015