The probability of an instant rail break, initiated at a single pre-existing rail foot crack due to a severe wheel impact loading, is predicted using statistical methods and a time-domain model for the simulation of dynamic vehicle–track interaction. A linear elastic fracture mechanics approach is employed to calculate the stress intensity at the crack in a continuously welded rail subjected to combined bending and temperature loading. Based on long-term field measurements in a wayside wheel load detector, a three-parameter probability distribution of the dynamic wheel load is determined. For a faster numerical assessment of the probability of failure, a thin plate spline regression is implemented to develop a meta-model of the performance function quantifying the stress intensity at the crack. The methodology is demonstrated by investigating the influence of initial crack length, fracture toughness and rail temperature difference on the risk for an instant rail break.


    Access

    Download


    Export, share and cite



    Title :

    Probability of instant rail break induced by wheel–rail impact loading using field test data


    Contributors:


    Publication date :

    2022-01-02


    Size :

    23 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown







    Urban rail wheel steel and urban rail wheel prepared by using urban rail wheel steel

    ZHANG XIAOFENG / LI SHULIN / JIA TUOSHENG et al. | European Patent Office | 2020

    Free access

    Wheel rail

    WANG WEIDONG | European Patent Office | 2015

    Free access

    METHOD FOR PRODUCING RAIL WHEEL AND RAIL WHEEL

    MAEJIMA TAKETO / KUBOTA MANABU | European Patent Office | 2020

    Free access