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Multiscale friction in lubricant-surface systems for high performance transmissions under mild wear

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posted on 06.06.2018 by Ed Humphrey, Nick Morris, Michael Leighton, Ramin Rahmani, Homer Rahnejat
The lubricant-surface system is complex in nature and can significantly affect the frictional performance of high-performance transmission systems. The complexity stems from the coupled mechanical and chemical phenomena that occur at the interfacial tooth conjunctions. A combined analytical and precision experimental approach is presented to analyse the salient parameters of the lubricant-surface system. A multiscale procedure comprising topographical measurement, pin-on-disc tribometry, atomic force microscopy in lateral force mode, X-ray photo-electron spectroscopy and continuum contact mechanics analysis under mixed non-Newtonian thermo-elastohydrodynamics is used to describe the formation of a tribo-film, as well as wear and frictional characteristics of the lubricant-surface system. The contribution of chemisorbed and physisorbed bonded tribo-film on the boundary coefficient of friction is ascertained at different physical scales. Therefore, the paper presents a novel multiscale analysis, promoting improved understanding of the complex interactions between mechanisms of friction, wear and surface chemistry.

Funding

The authors are grateful to the Engineering and Physical Science Research Council (EPSRC) for the financial support extended to this research through the Doctoral Training Program (DTP). The authors also acknowledge use of facilities within the Loughborough Materials Characterisation Centre (LMCC).

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Tribology Letters

Citation

HUMPHREY, E. ... et al, 2018. Multiscale friction in lubricant-surface systems for high performance transmissions under mild wear. Tribology Letters, 66, 77.

Publisher

Springer © The Author(s)

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Acceptance date

21/05/2018

Publication date

2018-05-24

Notes

This is an Open Access Article. It is published by Springer under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

ISSN

1023-8883

eISSN

1573-2711

Language

en

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