Contact defects initiation in railroad wheels ? Experience, experiments and modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F11%3A86079651" target="_blank" >RIV/61989100:27230/11:86079651 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/11:86079651

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.wear.2010.10.053" target="_blank" >http://dx.doi.org/10.1016/j.wear.2010.10.053</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.wear.2010.10.053" target="_blank" >10.1016/j.wear.2010.10.053</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Contact defects initiation in railroad wheels ? Experience, experiments and modelling

Popis výsledku v původním jazyce

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 thediameter 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 f

Název v anglickém jazyce

Contact defects initiation in railroad wheels ? Experience, experiments and modelling

Popis výsledku anglicky

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 thediameter 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 f

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Wear

ISSN

0043-1648

e-ISSN

—

Svazek periodika

271

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

174-185

Kód UT WoS článku

000291777600023

EID výsledku v databázi Scopus

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