Investigation of probable squat growth from initial surface cracks in rails using a three-dimensional rollover simulation

Squats are rather complex failure mechanisms in rails and challenge railway operators all over the world, thus calling for a detailed investigation of squats by means of finite element analysis to locate the initiation and propagating mechanisms. In this work, a cyclic three-dimensional (3D) finite...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part F, Journal of rail and rapid transit Journal of rail and rapid transit, 2024-04, Vol.238 (4), p.406-413
Main Authors: Gschwandl, Timna J, Antretter, Thomas, Künstner, David, Scheriau, Stephan, Daves, Werner
Format: Article
Language:English
Subjects:
Failure mechanisms
Finite element method
Rails
Rolling contact
Surface cracks
Three dimensional models
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Summary:Squats are rather complex failure mechanisms in rails and challenge railway operators all over the world, thus calling for a detailed investigation of squats by means of finite element analysis to locate the initiation and propagating mechanisms. In this work, a cyclic three-dimensional (3D) finite element model of a wheel-rail contact including an initial penny-shaped defect is used. This work presents the implementation of the starting penny-shaped crack in the rail for a wheel-rail simulation by utilising a submodel strategy. Moreover, viable evaluation options are shown. In the future, this set-up will help to assess multiple crack positions and possible squat growth mechanisms.
ISSN:0954-4097
2041-3017
DOI:10.1177/09544097231171742