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"
}