Počet záznamů: 1  

Fatigue crack propagation in steels for railway axles

  1. 1.
    0398731 - ÚFM 2015 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
    Náhlík, Luboš - Pokorný, Pavel - Hutař, Pavel - Matušek, P.
    Fatigue crack propagation in steels for railway axles.
    Materials Structure and Micromechanics of Fracture VII. Zurich: Trans Tech Publications, 2014 - (Šandera, P.), s. 254-257. Key Engineering Materials, 592-593. ISBN 978-3-03785-934-6. ISSN 1013-9826.
    [MSMF 7 - International Conference on Materials Structure & Micromechanics of Fracture /7./. Brno (CZ), 01.07.2013-03.07.2013]
    Grant CEP: GA MŠMT(CZ) EE2.3.20.0214
    Grant ostatní: VUT(CZ) FSIJ- 13-2046
    Institucionální podpora: RVO:68081723
    Klíčová slova: railway axle * crack retardation * variable loading amplitude * generalized Willenborg model
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika

    The paper deals with the influence of order of cycles in the loading block on the fatigue crack growth rate in railway axle. The railway axle can include some cracks from manufacturing process or initiated fatigue cracks from previous operation. It is advantageous to know how the crack will behave during further service of the train to ensure its safe operation. The most common approaches describing the fatigue crack growth do not take into account the effects of overload cycles, which enlarge the plastic zone ahead of the crack tip. The enlarged plastic zone generates residual compressive stresses, which cause a retardation of the fatigue crack growth. Finite element numerical calculations were used together with the generalized Willenborg model to determine influence of overload cycles on the increment of fatigue crack growing in railway axles. Real geometry of the axle, the crack front shape and typical loading spectrum were taken into account.
    Trvalý link: http://hdl.handle.net/11104/0228243

     
     
Počet záznamů: 1  

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