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    Triaxial residual strains in a railway rail measured by neutron diffraction

    Triaxial residual strains in a railway rail measured by neutron diffraction


    Accumulation of residual stresses in rails during service can contribute to crack initiation and fracture and may result in serious accidents. It is therefore necessary and important to quantify the residual stresses that evolve under repeated rolling contact between wheel and rail. In the present study, triaxial residual strain measurements were performed in a worn British railway rail using neutron diffraction. Localized stress is observed close to the region of contact, showing the asymmetry and complexity of distributions that arise from the non-uniform plastic deformation. Contact-induced plasticity is revealed by the broadening (increase in the full width at half-maximum (FWHM)) of the diffraction peaks.

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    Titel :

    Triaxial residual strains in a railway rail measured by neutron diffraction

    Weitere Titelangaben:

    Durch Neutronenbeugung gemessene dreiachsige Eigenspannung in Eisenbahnschienen

    Beteiligte:
    Jun, T.S. (Autor:in) / Hofmann, F. (Autor:in) / Belnoue, J. (Autor:in) / Song, X. (Autor:in) / Hofmann, M. (Autor:in) / Korsunsky, A.M. (Autor:in)
    Erschienen in:

    Journal of Strain Analysis for Engineering Design ; 44 , 7 ; 563-568

    Erscheinungsdatum :

    2009

    Format / Umfang :

    6 Seiten, 5 Bilder, 12 Quellen

    ISSN :

    0309-3247

    DOI :

    https://doi.org/10.1243/03093247JSA545

    Medientyp :

    Aufsatz (Zeitschrift)

    Format :

    Print

    Sprache :

    Englisch

    Schlagwörter :

    Eisenbahnschiene , Eigenspannung , Spannungsanalyse , dreiachsiger Spannungszustand , Neutronenbeugung , Kontaktermüdung , Rollkontakt , Beugungsbild , Halbwertsbreite , Schadensakkumulation , Schädigungsmechanismus

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