Influence of Extension of Load Spectrum on Estimation of Residual\nFatigue Lifetime of Railway Axle

0481102 - ÚFM 2018 RIV CH eng C - Conference Paper (international conference)
Pokorný, Pavel - Hutař, Pavel - Náhlík, Luboš
Influence of Extension of Load Spectrum on Estimation of Residual
Fatigue Lifetime of Railway Axle.
Materials Structure & Micromechanics of Fracture VIII. Zürrich: Trans Tech Publications, 2017 - (Šandera, P.), s. 607-610. Solid State Phenomena, 258. ISBN 978-3-03835-626-4. ISSN 1662-9779.
[MSMF8. International Conference on Materials Structure and Micromechanics of Fracture /8./. Brno (CZ), 27.06.2016-29.06.2016]
R&D Projects: GA MŠMT(CZ) LQ1601
Institutional support: RVO:68081723
Keywords : railway axle * fatigue crack * load spectrum * overload
OECD category: Audio engineering, reliability analysis

Railway axles are subjected to cyclic amplitude loading which can lead to fatigue failure.
For safe operation of railway axles a damage tolerance approach taking into account a possible
defect in railway axle is often required. Because of different operation regimes of trains (fast/slow
ride, ride on straight track, on curved track, over switches etc.) the load amplitude of axle is not
constant. The variability of load is defined by a load spectrum, which is determined experimentally
by measuring of load in service conditions. Even though the load spectrum is measured on several
hundreds or thousands of operation kilometres, the railway axles are in operation much longer time
(often tens of years). Therefore, some load amplitudes higher than ones measured in the test can
occur during a long-term axle service. The contribution presented deals with the effect of extension
of load spectrum by rare high load amplitudes, which can occur during long-term operation, on
residual fatigue lifetime of railway axles.
Permanent Link: http://hdl.handle.net/11104/0276711