Publication detail
Influence of crack retardation on fatigue crack propagation in steels for railway axles
NÁHLÍK, L. POKORNÝ, P. HUTAŘ, P.
Czech title
Vliv retardace na šíření únavové trhliny v ocelích pro železniční nápravy
English title
Influence of crack retardation on fatigue crack propagation in steels for railway axles
Type
conference paper
Language
en
Original abstract
The railway axles are subjected to cyclic loading, therefore there is a risk of fatigue failure. For reason that possible crack could not be detected by non-destructive testing method an existing crack in the railway axle must be considered. This is conservative approach commonly used in applications where potential fatigue failure has unaccepted consequences. This paper deals with retardation effect caused by overload cycles and compares results obtained by no retardation approach and results obtained by generalized Willenborg model, which takes into account the retardation effects due to plastic zone around the crack tip. Results obtained can contribute to the better understanding of fatigue crack behavior in railway axles.
Czech abstract
Článek se zabývá retardačními efekty únavové trhliny, které vznikají vlivem přetěžujících cyklů. Vliv pořadí zatěžných cyklů tedy i přetěžujících je určen pro různé hladiny zatížení vlakového spektra. Ukazuje se, že vliv pořadí cyklů je mnohem výraznější pro vyšší hladiny mechanického zatížení.
English abstract
The railway axles are subjected to cyclic loading, therefore there is a risk of fatigue failure. For reason that possible crack could not be detected by non-destructive testing method an existing crack in the railway axle must be considered. This is conservative approach commonly used in applications where potential fatigue failure has unaccepted consequences. This paper deals with retardation effect caused by overload cycles and compares results obtained by no retardation approach and results obtained by generalized Willenborg model, which takes into account the retardation effects due to plastic zone around the crack tip. Results obtained can contribute to the better understanding of fatigue crack behavior in railway axles.
Keywords in Czech
vlaková náprava, únavová trhlina, zobecněný Willenborgův model, retardace únavové trhliny
Keywords in English
railway axle, fatigue crack, generalized Willenborg model, crack retardation
RIV year
2014
Released
02.03.2014
Publisher
11th International Fatigue Congress
Location
Zurich
ISBN
978-3-03835-008-8
Book
11th International Fatigue Congress
Pages from–to
351–356
Pages count
6
BIBTEX
@inproceedings{BUT104825,
author="Luboš {Náhlík} and Pavel {Pokorný} and Pavel {Hutař},
title="Influence of crack retardation on fatigue crack propagation in steels for railway axles",
booktitle="11th International Fatigue Congress",
year="2014",
month="March",
pages="351--356",
publisher="11th International Fatigue Congress",
address="Zurich",
isbn="978-3-03835-008-8"
}