Sliding friction between railway wheels and rails results in considerable contact temperatures and gives rise to severe thermal stresses at the surfaces of the wheels and rails. An approximate analytical solution is presented for a line contact model. The increased bulk temperature of the wheel after a long period of constant operating conditions is also taken into account. The thermal stresses have to be superimposed on the mechanical contact stresses. They reduce the elastic limit of the wheel and rail, and yielding begins at lower mechanical loads. When residual stresses build up during the initial cycles of plastic deformation, the structure can carry higher loads with a purely elastic response in subsequent load cycles. This phenomenon is referred to as shakedown. Due to the distribution of temperature, the rail surface is generally subjected to higher stresses than the wheel surface. This can cause structural changes in the rail material and hence rail damage.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Thermal stresses and shakedown in wheel/rail contact


    Weitere Titelangaben:

    Wärmespannungen und Materialverfestigung beim Kontakt zwischen Schiene und Eisenbahnrad


    Beteiligte:
    Ertz, M. (Autor:in) / Knothe, K. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2003


    Format / Umfang :

    15 Seiten, 18 Bilder, 1 Tabelle, 25 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    Shakedown limit of rail surfaces including material hardening and thermal stresses

    Bohmer, A. / Ertz, M. / Knothe, K. | Tema Archiv | 2003


    Measuring Wheel/Rail Contact Stresses using Ultrasound

    Marshall, M. B. / Lewis, R. / Dwyer-Joyce, R. S. et al. | British Library Conference Proceedings | 2004


    Geometry and compressive stresses in wheel/rail contact

    Kleiner, Otto / Schindler, Christian | IuD Bahn | 2012


    Wheel-rail contact

    Bouteloup, M. | Engineering Index Backfile | 1949