Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 144, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2020.106044
Keywords
Fatigue crack-growth; Railway axle; Life prediction; Uncertainty; NDT inspections
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The study focuses on the stochastic nature of fatigue crack-growth in mechanical components and the prediction of residual fatigue life of a railway axle under different input parameters variability. Various sources of uncertainty are considered in the analysis.
Fatigue crack-growth of mechanical components is stochastic in nature and deterministic approaches do not allow for its complete study. Primary sources of this stochasticity can be: the inherent variability of material properties, the nature of service load fluctuations, the approximations assumed by the algorithms to calculate the main fracture parameters. This work reports a stochastic approach to the fatigue crack-growth in a railway axle under variability of different input parameters. The approach is used to predict the probability distribution of the residual fatigue life of a railway axle in presence of defects taking into account multiple sources of uncertainty.
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