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Effect of residual stresses on the fatigue lifetime of railway axle
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SYSNO ASEP 0481285 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Effect of residual stresses on the fatigue lifetime of railway axle Author(s) Hutař, Pavel (UFM-A) RID, ORCID
Pokorný, Pavel (UFM-A) ORCID
Poduška, Jan (UFM-A) ORCID
Fajkoš, R. (CZ)
Náhlík, Luboš (UFM-A) RID, ORCIDNumber of authors 5 Source Title ESIS TC24 Workshop 'Integrity of Railway Structures'. - Amsterdam : Elsevier, 2017 - ISSN 2452-3216 Pages s. 42-47 Number of pages 6 s. Publication form Online - E Action ESIS TC24 Workshop 'Integrity of Railw ay Structures' Event date 24.10.2016 - 25.10.2016 VEvent location Leoben Country AT - Austria Event type WRD Language eng - English Country NL - Netherlands Keywords Railway axle ; residual fatigue lifetime ; residual stresses ; inspection intervals ; numerical simulation 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) Institutional support UFM-A - RVO:68081723 UT WOS 000418401700006 DOI 10.1016/j.prostr.2017.07.005 Annotation The operation of railway axles should fulfill at least two main demands: safety and low operation costs. A significant part of operation costs is given by the length of regular inspection intervals which should reveal potential fatigue cracks in railway axle. The detection of cracks is of a probabilistic nature, therefore their detection is not ensured in all cases. For the safe operation of trains, an existence of potential initial crack should be considered on the axle surface and residual fatigue lifetime should be conservatively determined for this case. Reliable procedure of residual fatigue lifetime estimation should take into account real axle geometry, material characteristics and loading of the railway axle. This paper shows methodology for determination of residual fatigue lifetime (RFL) based on the fracture mechanics approach, taking into account real spectrum of the loading cycles, existence of press-fitted wheels and surface residual stresses given by the thermo-mechanical surface treatment of the railway axle. It is demonstrated that the effect of the residual stresses is significant and should not be neglected in the numerical estimation of residual fatigue lifetime of the axle. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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