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On the railhead material damage of insulated rail joints: Is it by ratchetting or alternating plasticity?
Cent Queensland Univ, Ctr Railway Engn, Rockhampton, Qld 4702, Australia..
Cent Queensland Univ, Ctr Railway Engn, Rockhampton, Qld 4702, Australia..
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-2571-4662
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-8237-5847
2019 (English)In: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 128, article id 105197Article in journal (Refereed) Published
Abstract [en]

Railhead becomes severely stressed due to localised contact loadings. This is more critical in the vicinity of endposts of an insulated rail joint. Popular IRJ endpost materials are fibreglass (fb), polytetrafluoroethylene (ptfe) and nylon66 (ny). A 3D finite element analysis is carried out to study stress distributions in railhead material near the endposts. The progressive damage parameter, von Mises stress and other residual stress and strain plots indicate that plastic deformation and material degradation occur at sub-surface levels of the railhead material. Although fb and ptfe are better endpost materials than ny, ny displays superior performance over the other two.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2019. Vol. 128, article id 105197
Keywords [en]
FEA, Wheel/rail contact, Rail Joints, Fatigue damage, Endpost materials
National Category
Applied Mechanics
Research subject
Engineering Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-260987DOI: 10.1016/j.ijfatigue.2019.105197ISI: 000484647400020OAI: oai:DiVA.org:kth-260987DiVA, id: diva2:1359804
Note

QC 20191010

Available from: 2019-10-10 Created: 2019-10-10 Last updated: 2019-11-26Bibliographically approved

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Berg, MatsStichel, Sebastian

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