Detail publikačního výsledku

Effects of variable loading on residual fatigue life of the railway wheelset

POKORNÝ, P.; NÁHLÍK, L.; ŠEVČÍK, M.; HUTAŘ, P.

Originální název

Effects of variable loading on residual fatigue life of the railway wheelset

Anglický název

Effects of variable loading on residual fatigue life of the railway wheelset

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

The paper deals with the effects of variable loading on residual fatigue life of the railway wheelset. The railway wheelsets can include some cracks created during manufacturing process or during previous operation. Therefore, it is important to know how the existing cracks will behave during further service of the train. The experiments show that the fatigue crack growth rate depends not only on size of the load amplitudes in a loading spectrum, but it depends also on the sequence of load amplitudes. Taking into account interaction effects of overloading cycles requires use a method that calculates increments of crack length in each cycle, i.e. cycle-by-cycle. One of such methods represents generalized Willenborg model. This model was used for residual fatigue life time estimations of railway wheelset and results obtained were compared with classical approach, which did not take into account interaction effects. Results obtained can be used for establishing of service intervals of railway wheelsets.

Anglický abstrakt

The paper deals with the effects of variable loading on residual fatigue life of the railway wheelset. The railway wheelsets can include some cracks created during manufacturing process or during previous operation. Therefore, it is important to know how the existing cracks will behave during further service of the train. The experiments show that the fatigue crack growth rate depends not only on size of the load amplitudes in a loading spectrum, but it depends also on the sequence of load amplitudes. Taking into account interaction effects of overloading cycles requires use a method that calculates increments of crack length in each cycle, i.e. cycle-by-cycle. One of such methods represents generalized Willenborg model. This model was used for residual fatigue life time estimations of railway wheelset and results obtained were compared with classical approach, which did not take into account interaction effects. Results obtained can be used for establishing of service intervals of railway wheelsets.

Klíčová slova

variable amplitude loading, residual fatigue life, generalized Willenborg model, fatigue crack, railway wheelset

Klíčová slova v angličtině

variable amplitude loading, residual fatigue life, generalized Willenborg model, fatigue crack, railway wheelset

Autoři

POKORNÝ, P.; NÁHLÍK, L.; ŠEVČÍK, M.; HUTAŘ, P.

Rok RIV

2014

Vydáno

23.09.2013

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Svazek

2014

Číslo

577-578

Stát

Švýcarská konfederace

Strany od

121

Strany do

124

Strany počet

4

BibTex

@article{BUT101722,
  author="Pavel {Pokorný} and Luboš {Náhlík} and Martin {Ševčík} and Pavel {Hutař}",
  title="Effects of variable loading on residual fatigue life of the railway wheelset",
  journal="Key Engineering Materials (print)",
  year="2013",
  volume="2014",
  number="577-578",
  pages="121--124",
  issn="1013-9826"
}