Detail publikace
Fatigue crack propagation in steels for railway axles
NÁHLÍK, L. POKORNÝ, P. HUTAŘ, P. MATUŠEK, P.
Anglický název
Fatigue crack propagation in steels for railway axles
Typ
Článek WoS
Jazyk
en
Originální abstrakt
The paper deals with the influence of order of cycles in the loading block on the fatigue crack growth rate in railway axle. The railway axle can include some cracks from manufacturing process or initiated fatigue cracks from previous operation. It is advantageous to know how the crack will behave during further service of the train to ensure its safe operation. The classical approaches describing the fatigue crack growth do not take into account the effects of overload cycles, which enlarge the plastic zone ahead of the crack tip. The enlarged plastic zone generates residual compressive stresses, which cause a retardation of the fatigue crack growth. Finite element numerical calculations were used together with the generalized Willenborg model to determine influence of overload cycles on the increment of fatigue crack growing in railway axles. Real geometry of the axle, the crack front shape and typical loading spectrum were taken into account.
Klíčová slova anglicky
railway axle, crack retardation, variable loading amplitude, generalized Willenborg model.
Vydáno
2014-01-06
ISSN
1013-9826
Časopis
Key Engineering Materials (print)
Ročník
2014
Číslo
592-593
Strany od–do
254–257
Počet stran
4
BIBTEX
@article{BUT101681,
author="Luboš {Náhlík} and Pavel {Pokorný} and Pavel {Hutař} and Petr {Matušek}",
title="Fatigue crack propagation in steels for railway axles",
journal="Key Engineering Materials (print)",
year="2014",
volume="2014",
number="592-593",
pages="254--257",
doi="10.4028/www.scientific.net/KEM.592-593.254",
issn="1013-9826"
}