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Transient analysis of surface roughness features in thermal elastohydrodynamic contacts
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0002-7285-6639
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0003-2772-4861
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0003-3157-4632
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement. Department of Mechanical Engineering, Tsinghua University, Beijing, China.ORCID-id: 0000-0003-1454-1118
Vise andre og tillknytning
2020 (engelsk)Inngår i: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 141, artikkel-id 105915Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Understanding the influence of surface roughness in elastohydrodynamically lubricated (EHL) contacts is essential to improve durability and friction performance of machine elements employing non-conformal contacting surfaces. In this work, the transient event of a surface feature passing through a thermal EHL line contact operating under different sliding conditions is investigated with the purpose of providing a deeper understanding of surface roughness influence. This is achieved by solving the EHL problem in space and time. It was seen that sliding influences the temperature rise in the contact significantly, especially in the vicinity of the asperity. However, due to the characteristic behaviour of EHL contacts, the local temperature rise mainly influence the film thickness during exiting of inlet perturbations and the asperity.

sted, utgiver, år, opplag, sider
Elsevier, 2020. Vol. 141, artikkel-id 105915
Emneord [en]
Thermal elastohydrodynamic lubrication, Transient conditions, Surface features, Numerical modelling
HSV kategori
Forskningsprogram
Maskinelement
Identifikatorer
URN: urn:nbn:se:ltu:diva-75817DOI: 10.1016/j.triboint.2019.105915ISI: 000505271400031Scopus ID: 2-s2.0-85071778495OAI: oai:DiVA.org:ltu-75817DiVA, id: diva2:1348019
Forskningsfinansiär
Swedish Energy Agency, 41215-1
Merknad

Validerad;2019;Nivå 2;2019-09-10 (johcin)

Tilgjengelig fra: 2019-09-03 Laget: 2019-09-03 Sist oppdatert: 2020-03-04bibliografisk kontrollert

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Hultqvist, TobiasVrček, AleksMarklund, PärPrakash, BrahamLarsson, Roland

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