Influence of threshold values on residual fatigue lifetime of railway axles under variable amplitude loading

0449788 - ÚFM 2016 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Pokorný, Pavel - Náhlík, Luboš - Hutař, Pavel
Influence of threshold values on residual fatigue lifetime of railway axles under variable amplitude loading.
International Conference on Material and Component Performance under Variable Amplitude Loading. Vol. C. Amsterdam: Elsevier Ltd, 2015 - (Papuga, J.; Ružička, M.), s. 380-385. Procedia Engineering, 101. ISSN 1877-7058.
[VAL 2015 - International Conference on Material and Component Performance under Variable Amplitude Loading /3./. Praha (CZ), 23.03.2015-26.03.2015]
Grant CEP: GA MŠMT(CZ) EE2.3.20.0214
Institucionální podpora: RVO:68081723
Klíčová slova: railway axle * residual fatigue lifetime * fatigue crack * EA4T
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
http://www.sciencedirect.com/science/article/pii/S187770581500644X

The paper deals with an estimation of residual fatigue lifetime of railway axles under real loading spectrum. The residual fatigue lifetime is given by magnitude of fatigue crack propagation rate. This rate depends predominantly on load, geometry and material of the axle. Standard steel EA4T for manufacturing of railwa y ax les is considered in this paper. The scatter of data i n v-K curve could be caused by inaccuracy of experimental meas urement or by local change of material properties. The paper shows important differences between obtained residual fatigue lifetime estimations considering scatter in measured material data, especially near the threshold region.
Trvalý link: http://hdl.handle.net/11104/0251236