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Investigation of the asperity point load mechanism for thermal elastohydrodynamic conditions
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics, Solid Mechanics.ORCID iD: 0000-0002-5101-9532
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics, Solid Mechanics.ORCID iD: 0000-0001-6896-1834
2019 (English)In: ICMFF12 - 12th international conference on multiaxial fatigue and fracture / [ed] PalinLuc, T Morel, F Carpinteri, A, E D P SCIENCES , 2019, article id 06001Conference paper, Published paper (Refereed)
Abstract [en]

The rolling contact fatigue damage called pitting or spalling develops more frequently in surfaces with negative than positive slip. Since normal line loads do not cause any tensile surface stresses this investigation considers the effects of small point shaped asperities. Shear traction causes tensile stresses at the trailing edge of asperities entering the contact at negative slip. At positive slip the tensile stresses appear at the leading edge when the asperities exit the contact. It was found that the trailing edge of the asperity breaks through the lubrication film at contact entry. This causes negative slip to be more detrimental than positive slip. At negative slip the location of large frictional shear stresses and tension stresses from normal asperity contact coincide.

Place, publisher, year, edition, pages
E D P SCIENCES , 2019. article id 06001
Series
MATEC Web of Conferences, ISSN 2261-236X ; 300
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-273538DOI: 10.1051/matecconf/201930006001ISI: 000528035400019OAI: oai:DiVA.org:kth-273538DiVA, id: diva2:1430771
Conference
12th International Conference on Multiaxial Fatigue and Fracture (ICMFF), JUN 24-26, 2019, Bordeaux, FRANCE
Note

QC 20200518

Available from: 2020-05-18 Created: 2020-05-18 Last updated: 2020-05-18Bibliographically approved

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Everitt, Carl-MagnusAlfredsson, Bo

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