Influence of variable stress ratio during train operation on residual fatigue lifetime of railway axles

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU140218" target="_blank" >RIV/00216305:26210/16:PU140218 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2452321616304668" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321616304668</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2016.06.447" target="_blank" >10.1016/j.prostr.2016.06.447</a>

Result language

angličtina

Original language name

Influence of variable stress ratio during train operation on residual fatigue lifetime of railway axles

Original language description

Railway axles are subjected to cyclic loading, which could lead to fatigue failure. Therefore, it is desired to know residual fatigue lifetime of railway axles to ensure safe operation of trains. Because of detection of relatively small fatigue cracks is not guaranteed an estimation of residual fatigue lifetime is based on damage tolerance approach. The acting stress ratio is variable due to variable amplitude loading and load caused by existence of press-fitted wheel in the vicinity of assumed crack. The contribution is focused on influence of variable stress ratio in EA4T steel on residual fatigue lifetime of railway axles. The influence of stress intensity factor on fatigue crack propagation rate was experimentally evaluated for three different stress ratios, which correspond to operation conditions. Two different expressions of fatigue crack propagation rate were used and mutually compared to show influence of the stress ratio on residual fatigue lifetime of structure made of EA4T steel. The first expression considers stress intensity factor range (respecting stress ratio R) and the second one uses maximal value of the stress intensity factor. The paper shows ability of both expressions to describe experimental data obtained under different stress ratios and their influence on estimated residual fatigue lifetime values. The results obtained contribute to the better estimation of residual fatigue lifetime of railway axles and generally to the safer rail transportation. Copyright (C) 2016 The Authors. Published by Elsevier B.V.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20302 - Applied mechanics

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Procedia Structural Integrity

ISSN

2452-3216

e-ISSN

—

Volume of the periodical

2

Issue of the periodical within the volume

1

Country of publishing house

IT - ITALY

Number of pages

8

Pages from-to

3585-3592

UT code for WoS article

000387976803082

EID of the result in the Scopus database

2-s2.0-85034062452