Detail publikace
Vliv prahové hodnoty na zbytkovou únavovou životnost železničních náprav
POKORNÝ, P. NÁHLÍK, L. HUTAŘ, P.
Český název
Vliv prahové hodnoty na zbytkovou únavovou životnost železničních náprav
Anglický název
The effect of threshold value on the residual fatigue lifetime of railway axles
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
The fatigue failure of railway axles could have unaccepted consequences. Because of safe operation, it is important to determine the residual fatigue lifetime. The railway axle could contain some cracks either from manufacturing process or from previous service operation. Present defectoscopy can reliably detect only relatively long cracks (longer than 2 mm), see [1]. In other words, there is a risk that the existing crack is not detected by defectoscopy. For conservative establishment of the residual fatigue lifetime the crack, which could be not detected by defectoscopy, must be considered. This paper deals with an effect of the threshold value of fatigue crack propagation on the residual fatigue lifetime of railway axles. Two very commonly used materials for railway axles EA1N and EA4T steels are considered. The results of this paper could be used for safer operation of railway axles.
Český abstrakt
Únavové selhání železniční nápravy za provozu může vést k neakceptovatelným následkům. Pro bezpečné provozování železniční nápravy je nutné znát její životnost a vyřadit ji z provozu dříve, než dojde k jejímu selhání. Z důvodu nezaručené detekce možných trhlin, je zbytková únavová životnost počítána s defektem typu trhlina. Tento článek ukazuje vliv prahové hodnoty na zbytkovou únavovou životnost železniční náprav, které jsou vyrobeny z konvenčních materiálů pro výrobu železničních náprav.
Anglický abstrakt
The fatigue failure of railway axles could have unaccepted consequences. Because of safe operation, it is important to determine the residual fatigue lifetime. The railway axle could contain some cracks either from manufacturing process or from previous service operation. Present defectoscopy can reliably detect only relatively long cracks (longer than 2 mm), see [1]. In other words, there is a risk that the existing crack is not detected by defectoscopy. For conservative establishment of the residual fatigue lifetime the crack, which could be not detected by defectoscopy, must be considered. This paper deals with an effect of the threshold value of fatigue crack propagation on the residual fatigue lifetime of railway axles. Two very commonly used materials for railway axles EA1N and EA4T steels are considered. The results of this paper could be used for safer operation of railway axles.
Klíčová slova česky
železniční náprava, prahová hodnota, únavová trhlina, zbytková únavová životnost
Klíčová slova anglicky
railway axle, threshold value, fatigue crack, residual fatigue lifetime
Rok RIV
2014
Vydáno
12.05.2014
ISBN
978-80-214-4871-1
Kniha
ENGINEERING MECHANICS 2014
Strany od–do
496–499
Počet stran
4
BIBTEX
@inproceedings{BUT108302,
author="Pavel {Pokorný} and Luboš {Náhlík} and Pavel {Hutař},
title="The effect of threshold value on the residual fatigue lifetime of railway axles",
booktitle="ENGINEERING MECHANICS 2014",
year="2014",
month="May",
pages="496--499",
isbn="978-80-214-4871-1"
}