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Fatigue lifetime estimation of railway axles
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SYSNO ASEP 0481281 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fatigue lifetime estimation of railway axles Author(s) Náhlík, Luboš (UFM-A) RID, ORCID
Pokorný, Pavel (UFM-A) ORCID
Ševčík, Martin (UFM-A) RID
Fajkoš, R. (CZ)
Matušek, P. (CZ)
Hutař, Pavel (UFM-A) RID, ORCIDNumber of authors 6 Source Title Engineering Failure Analysis. - : Elsevier - ISSN 1350-6307
Roč. 73, MAR (2017), s. 139-157Number of pages 19 s. Language eng - English Country GB - United Kingdom Keywords Residual fatigue lifetime ; Railway axle ; Variable amplitude loading ; Fatigue crack propagation ; Damage tolerance methodology Subject RIV JL - Materials Fatigue, Friction Mechanics OECD category Audio engineering, reliability analysis R&D Projects LM2015069 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) ED1.1.00/02.0068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000396773100011 EID SCOPUS 85008414312 DOI 10.1016/j.engfailanal.2016.12.014 Annotation The railway axles are subjected to cyclic loading during their operation. Their load is of long-
term nature, therefore a real risk of fatigue failure exists. This failure could lead to derailment
of the whole train with serious consequences. To prevent such scenario, the railway axles have
to be safely removed from operation before their final failure occurs.
This paper presents methodology for the residual fatigue lifetime prediction of the railway axle
based on the linear elastic fracture mechanics concept. The methodology contains estimation of
the critical position of initial crack, prediction of the fatigue crack front shape development
during crack propagation, separation of the bending and press-fitting contributions to the
axle load, experimental measurement of the crack growth kinetics of EA4T steel and subse-
quent estimation of the residual fatigue lifetime of railway axle. Part of the presented study
is also devoted to the probability aspects of determination of material characteristics describing
fatigue crack propagation and retardation effects caused by existence of plastic zone ahead of
propagating fatigue crack. Described methodology is already applied in the design process of
new railway axles in Bonatrans company.Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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