This paper addresses the lifetime of head-hardened steel rails used in the Vienna metro system. Metro steel rails are subjected to a variety of stresses such as stresses due to rolling contact, thermal stresses due to changing climatic seasonal conditions, residual stresses due to rail manufacturing and straightening and occasionally bending stresses due to improper bedding of the rails. These stresses are responsible for the magnitude of the fracture mechanics related R-value. It is shown that residual stresses and bending stresses can be made responsible for a dramatic increase of the stress variation and the number of cycles. Examples from the Vienna subway lines, Wiener Linien, will be presented.


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    Title :

    The effect of the R-value on the lifetime of cracked head-hardened steel rails for subways


    Contributors:


    Publication date :

    2012


    Size :

    16 Seiten, 10 Bilder, 1 Tabelle, 5 Quellen




    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




    The advantages of head-hardened rails

    Moser, A. / Pointner, P. / Associazione Italiana di Metallurgia | British Library Conference Proceedings | 1992


    Hardened rails

    Oertel, W. | Engineering Index Backfile | 1930


    Subways

    Schwandl, Robert | SLUB | 2010


    Subways?

    Kremer | Engineering Index Backfile | 1931