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Fatigue crack propagation in steels for railway axles
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SYSNO ASEP 0398731 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Fatigue crack propagation in steels for railway axles Author(s) Náhlík, Luboš (UFM-A) RID, ORCID
Pokorný, Pavel (UFM-A) ORCID
Hutař, Pavel (UFM-A) RID, ORCID
Matušek, P. (CZ)Number of authors 4 Source Title Materials Structure and Micromechanics of Fracture VII. - Zurich : Trans Tech Publications, 2014 / Šandera P. - ISSN 1013-9826 - ISBN 978-3-03785-934-6 Pages s. 254-257 Number of pages 4 s. Publication form Print - P Action MSMF 7 - International Conference on Materials Structure & Micromechanics of Fracture /7./ Event date 01.07.2013-03.07.2013 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords railway axle ; crack retardation ; variable loading amplitude ; generalized Willenborg model Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects EE2.3.20.0214 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000336694400055 EID SCOPUS 84891852490 DOI 10.4028/www.scientific.net/KEM.592-593.254 Annotation 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. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2015
Number of the records: 1