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TECHNICAL PAPERS

A Friction Model for Cold Strip Rolling With Two-Wavelength Surface Roughness in the “Mixed” Lubrication Regime

[+] Author and Article Information
H. R. Le, M. P. F. Sutcliffe

Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK

J. Tribol 125(3), 670-677 (Jun 19, 2003) (8 pages) doi:10.1115/1.1538191 History: Received December 11, 2001; Revised September 24, 2002; Online June 19, 2003
Copyright © 2003 by ASME
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References

Figures

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Schematic of the strip rolling process
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Cross-section of the contact between a smooth roll and strip with a two-wavelength surface roughness. The rolling direction is out of the plane of the figure: (a) when roll and strip first contact, and (b) after some asperity flattening.
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Plan view of the geometry of the contact patch between a smooth roll and rough strip with a two-wavelength surface roughness
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A flow chart of the numerical procedure
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Evolution of hydrodynamic pressure in valleys across the width as for conditions of 10, r=25 percent,ur=0.1 m/s
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Evolution of the depth of valleys across the width as for conditions of 10, r=25 percent,ur=0.1 m/s
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Comparison of predicted and measured surface roughness as for conditions of 13, r=25 percent
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Comparison of predicted and measured surface roughness as for conditions of 13, r=50 percent
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Comparison of predicted and measured average friction coefficients in rolling as for conditions of 10, μa=0.09
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Surface flattening rate predicted by Korzekwa et al. 24. The curves are fitted to the data using a least square method

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