A novel experimental method has been developed to investigate how model asperities, on opposing surfaces in an elastohydrodynamic (EHD) contact, interact to influence the lubricant film distribution. This technique allows direct measurements of lubricant film thickness during asperity-asperity collision. A surface having a single transverse ridge asperity was rubbed against a second surface having three different roughness features, a transverse ridge, multiple transverse ridges, and an array of hemispherical bumps to study the resultant micro-EHD films. This work reveals how the film thickness is greatly reduced when the peaks of opposing asperities coincide, and how asperities can combine to cause a larger volume of lubricant to be entrapped at their leading edges. The new technique described shows considerable promise for the study of mixed lubrication.
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e-mail: choojianwen@petronas.com.my
e-mail: a.v.olver@imperial.ac.uk
e-mail: h.spikes@imperial.ac.uk
e-mail: marie-laure.dumont@skf.com
e-mail: stathis.ioannides@skf.com
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April 2008
Research Papers
Interaction of Asperities on Opposing Surfaces in Thin Film, Mixed Elastohydrodynamic Lubrication
Jian W. Choo, Ph.D.,
Jian W. Choo, Ph.D.
Mem. STLE
Group Research,
e-mail: choojianwen@petronas.com.my
PETRONAS
, Lots 3288 and 3289, Off Jalan Ayer Itam, Kawasan Institusi Bangi, Kajang, Selangor 43000, Malaysia
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Andrew V. Olver,
Andrew V. Olver
Reader
Tribology Group, Department of Mechanical Engineering,
e-mail: a.v.olver@imperial.ac.uk
Imperial College London
, Exhibition Road, London SW7 2AZ, United Kingdom
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Hugh A. Spikes,
Hugh A. Spikes
Professor
Mem. STLE
Tribology Group, Department of Mechanical Engineering,
e-mail: h.spikes@imperial.ac.uk
Imperial College London
, Exhibition Road, London SW7 2AZ, United Kingdom
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Marie-Laure Dumont, Ph.D.,
e-mail: marie-laure.dumont@skf.com
Marie-Laure Dumont, Ph.D.
SKF Research and Development Centre
, B.V., Kelvinbaan 16, Nieuwegein 3430 DT, The Netherlands
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Eustathios Ioannides
e-mail: stathis.ioannides@skf.com
Eustathios Ioannides
Professor
Mem. STLE
SKF Research and Development Centre
, B.V., Kelvinbaan 16, Nieuwegein 3430 DT, The Netherlands
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Jian W. Choo, Ph.D.
Mem. STLE
Group Research,
PETRONAS
, Lots 3288 and 3289, Off Jalan Ayer Itam, Kawasan Institusi Bangi, Kajang, Selangor 43000, Malaysiae-mail: choojianwen@petronas.com.my
Andrew V. Olver
Reader
Tribology Group, Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, London SW7 2AZ, United Kingdome-mail: a.v.olver@imperial.ac.uk
Hugh A. Spikes
Professor
Mem. STLE
Tribology Group, Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, London SW7 2AZ, United Kingdome-mail: h.spikes@imperial.ac.uk
Marie-Laure Dumont, Ph.D.
SKF Research and Development Centre
, B.V., Kelvinbaan 16, Nieuwegein 3430 DT, The Netherlandse-mail: marie-laure.dumont@skf.com
Eustathios Ioannides
Professor
Mem. STLE
SKF Research and Development Centre
, B.V., Kelvinbaan 16, Nieuwegein 3430 DT, The Netherlandse-mail: stathis.ioannides@skf.com
J. Tribol. Apr 2008, 130(2): 021505 (10 pages)
Published Online: April 24, 2008
Article history
Received:
September 25, 2006
Revised:
October 10, 2007
Published:
April 24, 2008
Citation
Choo, J. W., Olver, A. V., Spikes, H. A., Dumont, M., and Ioannides, E. (April 24, 2008). "Interaction of Asperities on Opposing Surfaces in Thin Film, Mixed Elastohydrodynamic Lubrication." ASME. J. Tribol. April 2008; 130(2): 021505. https://doi.org/10.1115/1.2908904
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