The bolt-hole cold-expansion process has been demonstrated by laboratory tests to significantly affect the initiation and propagation of fatigue cracks from rail bolt holes such that a reduction of the incidence of rail-bolt-hole failure in cold-expanded rail would be expected. A field-verification experiment was implemented in 1977 and reported in Volume I of this report. This volume contains the results of the field experiment, and examination of the effect of fatigue ratio (R) on the observed laboratory fatigue-life improvement of cold-expanded bolt holes, an investigation of crack growth of rails in a vacuum environment, and a comparison of the fatigue performance of cold-expanded bolt holes with rail flashwelds.


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    Titel :

    Sleeve Expansion of Bolt Holes in Railroad Rail. Volume III - Field Experiment Results


    Beteiligte:
    D. V. Lindh (Autor:in) / R. Q. Taylor (Autor:in) / D. M. Rose (Autor:in)

    Erscheinungsdatum :

    1980


    Format / Umfang :

    111 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch






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