Publication detail
Influence of Threshold Values on Residual Fatigue Lifetime of Railway Axles under Variable Amplitude Loading
POKORNÝ, P. NÁHLÍK, L. HUTAŘ, P.
Czech title
Vliv prahové hodnoty na zbytkovou únavovou životnost železniční nápravy zatížené proměnlivou amplitudou
English title
Influence of Threshold Values on Residual Fatigue Lifetime of Railway Axles under Variable Amplitude Loading
Type
journal article in Web of Science
Language
en
Original abstract
The paper deals with an estimation of residual fatigue lifetime of railway axles under real loading spectrum. The residual fatigue lifetime is given by magnitude of fatigue crack propagation rate. This rate depends predominantly on load, geometry and material of the axle. Standard steel EA4T for manufacturing of railway axles is considered in this paper. The scatter of data in v-K curve could be caused by inaccuracy of experimental measurement or by local change of material properties. The paper shows important differences between obtained residual fatigue lifetime estimations considering scatter in measured material data, especially near the threshold region.
Czech abstract
Článek se zabývá určováním zbytkové únavové životnosti železničních náprav. Zbytková životnost záleží na rychlosti šíření únavové trhliny, která je závislá především na podobě zatížení, geometrii a materiálu nápravy. Článek je podrobně zaměřen na vliv pravděpodobnostního proložení materiálových dat na vypočítanou zbytkovou únavovou životnost.
English abstract
The paper deals with an estimation of residual fatigue lifetime of railway axles under real loading spectrum. The residual fatigue lifetime is given by magnitude of fatigue crack propagation rate. This rate depends predominantly on load, geometry and material of the axle. Standard steel EA4T for manufacturing of railway axles is considered in this paper. The scatter of data in v-K curve could be caused by inaccuracy of experimental measurement or by local change of material properties. The paper shows important differences between obtained residual fatigue lifetime estimations considering scatter in measured material data, especially near the threshold region.
Keywords in Czech
železniční náprava; zbytková únavová životnost; únavová trhlina; EA4T
Keywords in English
railway axle; residual fatigue lifetime; fatigue crack; EA4T
RIV year
2015
Released
20.03.2015
Publisher
Elsevier
ISSN
1877-7058
Volume
101
Number
1
Pages from–to
380–385
Pages count
6
BIBTEX
@article{BUT115432,
author="Pavel {Pokorný} and Luboš {Náhlík} and Pavel {Hutař},
title="Influence of Threshold Values on Residual Fatigue Lifetime of Railway Axles under Variable Amplitude Loading",
year="2015",
volume="101",
number="1",
month="March",
pages="380--385",
publisher="Elsevier",
issn="1877-7058"
}