Crack closure in near-threshold fatigue crack propagation in railway axle steel EA4T

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00481653" target="_blank" >RIV/68081723:_____/17:00481653 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.engfracmech.2017.02.013" target="_blank" >http://dx.doi.org/10.1016/j.engfracmech.2017.02.013</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.engfracmech.2017.02.013" target="_blank" >10.1016/j.engfracmech.2017.02.013</a>

Result language
angličtina
Original language name
Crack closure in near-threshold fatigue crack propagation in railway axle steel EA4T
Original language description
The paper is focused on fatigue crack propagation in the threshold area of the EA4T railwaynaxle steel. Railway axles represent one of the most critical components for safety of trains.nThe main aim of this paper is to describe fatigue crack closure mechanisms in EA4T, whichnsignificantly influence the threshold value – a crucial parameter for determination of resid-nual fatigue lifetime of railway axles. Investigated fatigue crack closure mechanisms are:nplasticity induced crack closure, roughness-induced crack closure and oxide-induced cracknclosure. One part of this paper is focused on comparison of crack closure determined bynNASGRO relationship (including plasticity induced crack closure mechanism only) withnthe experimentally obtained one. Difference between these two approaches is explainednby presence of roughness and oxide induced crack closure. Based on theoretical models dif-nferent sources of fatigue crack closure mechanisms was separated and evaluated. The sig-nnificance of oxide-induced crack closure was confirmed based on experimentalnmeasurement of fatigue crack propagation in low humidity air. Finally, the effect of anreduced threshold value in low-humidity air on residual fatigue lifetime of railway axlesnis demonstrated.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20306 - Audio engineering, reliability analysis

Project
<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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