About: Contact defects initiation in railroad wheels – Experience, experiments and modelling

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Main results of comprehensive research of rolling contact defects initiation are presented in this contribution. Description of own experimental study has been preceded by practical experience of a wheelset producer. A line rolling/sliding contact case with creepage of 0.75% was investigated using a unique test machine. The rail disc was made from Class C steel grade while the wheel disc from R7T steel grade. Unlike the standard twin-disc test, the diameter of the rail disc was 2.6 times bigger than the diameter of the wheel disc. Development of contact cracks and accumulation of shear strain for the wheel material R7T during rolling contact loading were namely evaluated. On the basis of test conditions, simulation by FEM was performed. As the result, very good prediction of shear strain accumulation was achieved using the AbdelKarim-Ohno cyclic plasticity model. The proposed computational strategy can be used for fatigue life prediction till initiation of a crack caused by low-cycle fatigue or by ratcheting failure. Main results of comprehensive research of rolling contact defects initiation are presented in this contribution. Description of own experimental study has been preceded by practical experience of a wheelset producer. A line rolling/sliding contact case with creepage of 0.75% was investigated using a unique test machine. The rail disc was made from Class C steel grade while the wheel disc from R7T steel grade. Unlike the standard twin-disc test, the diameter of the rail disc was 2.6 times bigger than the diameter of the wheel disc. Development of contact cracks and accumulation of shear strain for the wheel material R7T during rolling contact loading were namely evaluated. On the basis of test conditions, simulation by FEM was performed. As the result, very good prediction of shear strain accumulation was achieved using the AbdelKarim-Ohno cyclic plasticity model. The proposed computational strategy can be used for fatigue life prediction till initiation of a crack caused by low-cycle fatigue or by ratcheting failure. (en)
Title	Contact defects initiation in railroad wheels – Experience, experiments and modelling Contact defects initiation in railroad wheels – Experience, experiments and modelling (en)
skos:prefLabel	Contact defects initiation in railroad wheels – Experience, experiments and modelling Contact defects initiation in railroad wheels – Experience, experiments and modelling (en)
skos:notation	RIV/61989100:27640/11:86079651!RIV12-MSM-27640___
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6198910027)
http://linked.open...iv/cisloPeriodika	1-2
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Matějková, Petra
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Centrum nanotechnologií
http://linked.open...dnocenehoVysledku	191782
http://linked.open...ai/riv/idVysledku	RIV/61989100:27640/11:86079651
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Low-cycle fatigue; Crack initiation; Ratcheting; Rolling contact fatigue (en)
http://linked.open.../riv/klicoveSlovo	Crack initiation Low-cycle fatigue Ratcheting Rolling contact fatigue
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[AE1E9B86ED0C]
http://linked.open...i/riv/nazevZdroje	Wear
http://linked.open...in/vavai/riv/obor	JL
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	271
http://linked.open...iv/tvurceVysledku	Fajkoš, Rostislav Fojtík, František Halama, Radim Matušek, Petr Matějková, Petra Václavek, Leo
http://linked.open...ain/vavai/riv/wos	000291777600023
http://linked.open...n/vavai/riv/zamer	Výpočetně náročné počítačové simulace a optimalizace
issn	0043-1648
number of pages	12 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.wear.2010.10.053
http://localhost/t...ganizacniJednotka	27640

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