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Comparison of different load spectra on residual fatigue lifetime of railway axle
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SYSNO ASEP 0434930 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Comparison of different load spectra on residual fatigue lifetime of railway axle Author(s) Pokorný, Pavel (UFM-A) ORCID
Náhlík, Luboš (UFM-A) RID, ORCID
Hutař, Pavel (UFM-A) RID, ORCIDNumber of authors 3 Source Title XVII International Colloquium on Mechanical Fatigue of Metals (ICMFM17). - Amsterdam : Elsevier, 2014 / Gulagliano M. ; Vergani L. - ISSN 1877-7058 Pages s. 313-316 Number of pages 4 s. Publication form Medium - C Action ICMFM 2014 International Colloquium on Mechanical Fatigue of Metals /17./ Event date 25.06.2014-27.06.2014 VEvent location Verbania Country IT - Italy Event type WRD Language eng - English Country NL - Netherlands Keywords railway axle ; residual fatigue lifetime ; fatigue crack ; load spectrum ; EA1N ; EA4T Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects EE2.3.20.0197 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000396733300056 EID SCOPUS 84904409260 DOI https://doi.org/10.1016/j.proeng.2014.06.269 Annotation The railway axles are subjected to variable amplitude loading. The variability is caused by many different regimes of train operation. The dominant load is caused by the weight of the vehicle, which generates rotary bending during train movement. Nevertheless, there are additional forces, which are generated when train goes through curved track, over crossovers, switches, rail joints etc. Present non-destructive defectoscopy can reliably detect only relatively long cracks (approximately 2 mm long or longer). Hence there is a risk that the existing crack is not detected. Therefore, for conservative estimation of the residual fatigue lifetime the railway axle with a crack should be considered. The behaviour of the crack depends on load spectrum of railway axle. Hence for accurate determination of residual fatigue lifetime of the railway axle is necessary to know representative load spectrum. This paper compares several measured load spectra of railway axles, which are available in the literature. The effect of different load spectra is shown on two widely used materials for railway axles: EA1N and EA4T steels. Obtained results could be used for safer operation of railway axles. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2015
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