Detail publikačního výsledku

Fatigue crack propagation in steels for railway axles

NÁHLÍK, L.; POKORNÝ, P.; HUTAŘ, P.; MATUŠEK, P.

Originální název

Fatigue crack propagation in steels for railway axles

Anglický název

Fatigue crack propagation in steels for railway axles

Druh

Článek WoS

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.

Anglický 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

railway axle, crack retardation, variable loading amplitude, generalized Willenborg model.

Klíčová slova v angličtině

railway axle, crack retardation, variable loading amplitude, generalized Willenborg model.

Autoři

NÁHLÍK, L.; POKORNÝ, P.; HUTAŘ, P.; MATUŠEK, P.

Rok RIV

2017

Vydáno

06.01.2014

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Svazek

2014

Číslo

592-593

Stát

Švýcarská konfederace

Strany od

254

Strany do

257

Strany počet

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"
}