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Experimental and numerical investigation of asperities and indents with respect to rolling contact fatigue
Department of Engineering Mechanics, KTH Royal Institute of Technology, SE 100 44, Stockholm, Sweden.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-2772-4861
Department of Engineering Mechanics, KTH Royal Institute of Technology, SE 100 44, Stockholm, Sweden.
2020 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 151, article id 106494Article in journal (Refereed) Published
Abstract [en]

Rolling contact experiments with slip were performed on artificial asperities and indents with pile-up. Micro-pits arose at the leading edge of the asperities and classic rolling contact fatigue (RCF) cracks initiated behind the trailing edge of the indents. The elastic-plastic run-in process and the thermal elastohydrodynamic lubrication (TEHL) load cycles were studied numerically. The run-in process caused high tensile residual stresses at the leading edge of the asperities while the TEHL load cycle caused high tensile stresses at the trailing edge of both the asperities and the indents. The conclusion was thus drawn that the classic RCF cracks behind the indents were caused by the TEHL load cycle while the micro-pits at these artificial asperities were caused by the tensile residual stresses from plastic deformation.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 151, article id 106494
Keywords [en]
Contact mechanics, Rolling contact fatigue, Rough surface, Thermal elastohydrodynamic lubrication
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-80154DOI: 10.1016/j.triboint.2020.106494ISI: 000580595400068Scopus ID: 2-s2.0-85088959369OAI: oai:DiVA.org:ltu-80154DiVA, id: diva2:1451626
Note

Validerad;2020;Nivå 2;2020-08-17 (marisr)

Available from: 2020-07-03 Created: 2020-07-03 Last updated: 2020-11-26Bibliographically approved

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Vrček, Aleks

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