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TECHNICAL PAPERS

Lubricant Film Thickness in Rough Surface, Mixed Elastohydrodynamic Contact

[+] Author and Article Information
G. Guangteng, P. M. Cann, A. V. Olver, H. A. Spikes

Tribology Section, Imperial College, London SW7 2BX, United Kingdom

J. Tribol 122(1), 65-76 (Jul 14, 1999) (12 pages) doi:10.1115/1.555330 History: Received March 04, 1999; Revised July 14, 1999
Copyright © 2000 by ASME
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References

Figures

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Schematic of test setup
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Optical profilometer maps of artificial roughness features. (a) Single transverse ridge. (b) 2-D array of circular bumps.
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Comparison of SLIM film thickness measurements with ultrathin film interferometry
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Influence of contact pressure on effective spacer layer thickness (relative to 0.45 GPa)
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Film thickness maps for a single transverse ridge in contact (inlet of left). (a) Static contact, (b) 0.0125 m/s, (c) 0.059 m/s, (d) 0.104 m/s.
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Film thickness profiles for a single transverse ridge in contact (inlet on left). (a) Static contact. (b) 0.0125 m/s. (c) 0.059 m/s. (d) 0.104 m/s.
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(Top) Film thickness maps for a multiple transverse ridges in contact (inlet on left). (a) Static contact, (b) 0.113 m/s. (Bottom) Film thickness maps for a multiple longitudinal ridges in contact (inlet on left). (c) Static contact, (d) 0.108 m/s.
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Film thickness profiles for a multiple transverse ridges in contact (inlet on left). (a) 0.0142 m/s. (b) 0.0540 m/s.
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Film thickness profiles for a multiple longitudinal ridges in contact (inlet on left). (a) 0.0138 m/s. (b) 0.0545 m/s.
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(Top) Film thickness maps for 2-D array of bumps in contact (inlet on left). (a) Static contact, (b) 0.103 m/s. (Bottom) Film thickness maps for random rough surface in contact (inlet on left). (c) 0.0210 m/s, (d) 0.108 m/s.
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Film thickness profiles for 2-D array of bumps in contact at 0.103 m/s (inlet on left)
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Film thickness profile for a single transverse ridge in the contact inlet (inlet on left)
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Film thickness versus speed plots for single transverse ridge in contact (smooth=mean central film thickness for smooth ball)
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Film thickness versus speed plots for multiple transverse ridges in contact (smooth=mean central film thickness for smooth ball)
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Film thickness versus speed plots for multiple longitudinal ridges in contact (smooth=mean central film thickness for smooth ball)
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Film thickness versus speed plots for 2-D array of bumps in contact (smooth=mean central film thickness for smooth ball)
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Film thickness versus speed plots for random rough surfaces in contact (smooth=mean central film thickness for smooth ball)
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Comparison of mean film thickness versus speed plots for different surface roughnesses (smooth=mean central film thickness for smooth ball)
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Comparison of minimum film thickness versus speed plots for different surface roughnesses
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Influence of sliding speed on film thickness for single transverse ridge
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Film thickness map for single transverse ridge at 62% slide roll ratio (disk faster) (inlet on left)
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Variation of in-contact effective root mean square roughness for 2-D array of bumps
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Variation of in-contact effective root mean square roughness for random rough surface

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