Publication detail

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

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

Original Title

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

Type

journal article - other

Language

English

Original Abstract

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.

Keywords

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

Authors

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

RIV year

2013

Released

23. 9. 2013

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

2014

Number

577-578

State

Swiss Confederation

Pages from

121

Pages to

124

Pages count

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"
}