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Boundary interactions of rough non-gaussian surfaces

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journal contribution
posted on 14.07.2016 by Michael Leighton, Nick Morris, Michael Gore, Ramin Rahmani, Homer Rahnejat, Paul King
Surface topography is important as it influences contact load-carrying capacity and operational efficiency through generated friction, as well as wear. As a result, a plethora of machining processes and surface finishing techniques have been developed. These processes yield topographies, which are often non-Gaussian, with roughness parameters that alter hierarchically according to their interaction heights. They are also subject to change through processes of rapid initial running-in wear as well as any subsequent gradual wear and embedding. The stochastic nature of the topography makes for complexity of contact mechanics of rough surfaces, which was first addressed by the pioneering work of Greenwood and Williamson, which among other issues is commemorated by this contribution. It is shown that their seminal contribution, based on idealised Gaussian topography and mean representation of asperity geometry should be extended for practical applications where surfaces are often non-Gaussian, requiring the inclusion of surface-specific data which also evolve through process of wear. The paper highlights a process dealing with practical engineering surfaces from laboratory-based testing using a sliding tribometer to accelerated fired engine testing for high performance applications of cross-hatched honed cylinder liners. Such an approach has not hitherto been reported in literature.

Funding

The authors would like to thank the UK Engineering and Physical Sciences Research Council (EPSRC) for the sponsorship of this research under the Encyclopaedic Program Grant (www.encyclopaedic.org).

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology

Citation

LEIGHTON, M. ... et al., 2016. Boundary interactions of rough non-gaussian surfaces. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 230 (11), pp. 1359-1370.

Publisher

© IMechE (SAGE)

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 3.0 (CC BY 3.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by/3.0/

Acceptance date

26/05/2016

Publication date

2016

Notes

This is an Open Access article published by Sage and distributed under the terms of the Creative Commons Attribution 3.0 Licence (CC BY 3.0), https://creativecommons.org/licenses/by/3.0/

ISSN

1350-6501

Language

en

Licence

Exports