Conventionally, laboratory measurements under idealized conditions are used to establish parameters needed in different kinds of wear models. This paper presents a procedure for determining the Archard's wear coefficient from data collected in a full-scale wheel-rail test rig, i.e. under realistic loading conditions. Moreover, a simulation procedure capable of simulating rail profile evolution in conformal contacts incorporating both wear and plasticity is presented. In each simulation step, dynamic responses are calculated using the commercial vehicle-track interaction software GENSYS. The conformal contact is treated by applying a multi-Hertzian approach. To account for plastic deformations, a 2D elasto-plastic FE analysis is carried out in conjunction with a 3D local contact analysis in the commercial finite element (FE) software ABAQUS. It is shown that, due to the conformal contact, elastic shakedown is obtained after only a few load cycles and is therefore disregarded in the subsequent analyses. Quantitatively good results, in terms of worn-off area and shape of the worn profile, are presented for simulations between 20 k and 100 k load cycles. However, dependence between the chosen wear step length and the profiles obtained from the simulations is found.


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    Titel :

    Prediction of wear and plastic flow in rails - Test rig results, model calibration and numerical prediction


    Weitere Titelangaben:

    Vorhersage von Verschleiß und plastischem Fließen von Schienen - Prüfstandversuche, Modellbeschreibung und numerische Vorhersage


    Beteiligte:
    Brouzoulis, Jim (Autor:in) / Torstensson, Peter T. (Autor:in) / Stock, Richard (Autor:in) / Ekh, Magnus (Autor:in)


    Erscheinungsdatum :

    2011


    Format / Umfang :

    8 Seiten




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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