Počet záznamů: 1

Effect of residual stresses on the fatigue lifetime of railway axle

SYSNO ASEP	0481285
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Effect of residual stresses on the fatigue lifetime of railway axle
Tvůrce(i)	Hutař, Pavel (UFM-A)_{RID, ORCID} Pokorný, Pavel (UFM-A)_ORCID Poduška, Jan (UFM-A)_ORCID Fajkoš, R. (CZ) Náhlík, Luboš (UFM-A)_{RID, ORCID}
Celkový počet autorů	5
Zdroj.dok.	ESIS TC24 Workshop 'Integrity of Railway Structures'. - Amsterdam : Elsevier, 2017 - ISSN 2452-3216
Rozsah stran	s. 42-47
Poč.str.	6 s.
Forma vydání	Online - E
Akce	ESIS TC24 Workshop 'Integrity of Railw ay Structures'
Datum konání	24.10.2016 - 25.10.2016
Místo konání	Leoben
Země	AT - Rakousko
Typ akce	WRD
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	Railway axle ; residual fatigue lifetime ; residual stresses ; inspection intervals ; numerical simulation
Vědní obor RIV	JL - Únava materiálu a lomová mechanika
Obor OECD	Audio engineering, reliability analysis
CEP	LM2015069 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UFM-A - RVO:68081723
UT WOS	000418401700006
DOI	10.1016/j.prostr.2017.07.005
Anotace	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.
Pracoviště	Ústav fyziky materiálu
Kontakt	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Rok sběru	2018

Počet záznamů: 1