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TECHNICAL PAPERS

Influence of Longitudinal Roughness on Friction in EHL Contacts

[+] Author and Article Information
B. Jacod, C. H. Venner

University of Twente, Faculty of Mechanical Engineering, P.O. Box 217, NL 7500 AE Enschede, The Netherlands

P. M. Lugt

SKF Engineering and Research Centre B.V., P.O. Box 2350, NL 3430 DT Nieuwegein, The Netherlands

J. Tribol 126(3), 473-481 (Jun 28, 2004) (9 pages) doi:10.1115/1.1705664 History: Received February 20, 2003; Revised August 20, 2003; Online June 28, 2004
Copyright © 2004 by ASME
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References

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Greenwood,  J. A., and Morales Espejel,  G. E., 1994, “The Behavior of Transverse Roughness in EHL Contacts,” Proc. Inst. Mech. Eng., 208, pp. 121–132.
Venner, C. H., Couhier, F., Lubrecht, A. A., and Greenwood, J. A., 1997, “Amplitude Reduction of Waviness in Transient EHL Line Contacts,” Proc. 23rd Leeds-Lyon symposium on Tribology, pp. 103–112.
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Zhu,  D., and Ai,  X., 1997, “Point Contact EHL Based on Optically Measured Three-Dimensional Rough Surfaces,” ASME J. Tribol., 119, pp. 375–384.
Hu,  Y.-Z., and Zhu,  D., 2000, “A Full Numerical Solution to the Mixed Lubrication in Point Contacts,” ASME J. Tribol., 122, pp. 1–9.
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Jacod,  B., Venner,  C. H., and Lugt,  P. M., “Extension of the Friction Mastercurve to Limiting Shear Stress Models,” ASME J. Tribol., 125, pp. 739–746.
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Venner, C. H., Kaneta, M., Nishikawa, H., and Jacod, B., 2000, “Effects of Waviness on the Film Thickness of a Circular EHL Contact Under Rolling/Sliding,” Proc. International Tribology Conference, Nagasaki, pp. 631–636.
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Figures

Grahic Jump Location
Pressure (a), film thickness (b). IB1 M=500,L=10,S=0.5 percent and τ0=4 MPa,Ā =0.5 and W =1/6.
Grahic Jump Location
Friction variations δμ̄/μ̄ as a function of τ̄c for Ā =1/2 and W =1/6
Grahic Jump Location
Friction variations δμ̄/μ̄ as a function of (Γ−1) for Ā =1/2 and W =1/6
Grahic Jump Location
Friction variations δμ̄/μ̄ as a function of (Γ−1) for varying Ā and W . Plain line, Eq. (23).
Grahic Jump Location
Comparison of friction variations calculated for RX/RY=1/2 or RX/RY=1/5 and Eq. (23)
Grahic Jump Location
Measured roughness profiles and truncated (n=34) Fourier reconstruction
Grahic Jump Location
Film thickness and pressure profile for R1 (Ā * =0.27) and R2 (Ā * =0.31). Case IB1.
Grahic Jump Location
Comparison of the friction variation δμ̄/μ̄ obtained for the reconstructed profiles by full numerical calculation and by Eq. (25) and Eq. (23). From left to right IB2, CR1, IB1, CY2, CY1 and CR2.

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