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Study of Surface Roughness on Friction in Rolling/Sliding Contacts: Ball-on-Disc Versus Twin-Disc
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).ORCID iD: 0000-0003-4447-3363
Zhejiang Univ, Zheda Rd 38, Hangzhou 310027, Peoples R China..
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).ORCID iD: 0000-0003-4461-0209
2020 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 68, no 2, article id 69Article in journal (Refereed) Published
Abstract [en]

Although the efficiency of a gear pair is currently high, a better understanding of surface/lubricant contribution on efficiency is critical. Electrified drivelines will, for example, impose higher speed and alternate loading, and it is expected that these new conditions will, to a greater extent, rely on the surface/lubricant characteristics. Phenomena taking place in the gear contact is often measured using ball-on-disc and twin-disc tribometers. In this study, these two test set-ups were compared in order to assess differences in the behaviour of surface/lubricant interactions. Results showed that ball-on-disc and twin-disc set-ups reflect the same friction trends. However, the friction results differed by a factor of roughly two, even though the tribometers were set-up to run at the same contact pressure. The wear mechanisms also differed: micropits occurred on discs used in the twin-disc set-up, whereas normal or no wear was found on the ball-on-disc specimens. The contact conditions for the two test set-ups were also analysed using a numerical model. The comparison of these two machines may aid gear designers in selecting the proper experimental set-up for their purpose.

Place, publisher, year, edition, pages
Springer Science and Business Media LLC , 2020. Vol. 68, no 2, article id 69
Keywords [en]
Ball-on-disc, Twin-disc, Surface roughness, Contact analysis
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-276895DOI: 10.1007/s11249-020-01310-zISI: 000536246100001Scopus ID: 2-s2.0-85085558175OAI: oai:DiVA.org:kth-276895DiVA, id: diva2:1445401
Note

QC 20200623

Available from: 2020-06-23 Created: 2020-06-23 Last updated: 2022-06-26Bibliographically approved

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Bergseth, EllenSöderberg, Anders

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