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TECHNICAL PAPERS

A New Mechanism of Asperity Flattening in Sliding Contact—The Role of Tool Elastic Microwedge

[+] Author and Article Information
Sy-Wei Lo, Tung-Sheng Yang

Institute of Engineering Science and Technology, National Yunlin University of Science and Technology, Touliu, Yunlin 640, Taiwan

J. Tribol 125(4), 713-719 (Sep 25, 2003) (7 pages) doi:10.1115/1.1574518 History: Received August 01, 2002; Revised February 04, 2003; Online September 25, 2003
Copyright © 2003 by ASME
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References

Figures

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Adhesive coefficient versus nondimensional asperity contact pressure for aluminum sheet with transverse roughness 1
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Contact area ratio A versus sliding distance for aluminum sheet with transverse roughness 1
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FEM model of sliding contact
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Influence of tool Young’s modulus on distribution of effective stress (a) rigid tool, E=∞; (b) Young’s modulus E=210 GPa; and (c) Young’s modulus E=83 GPa.
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Influence of friction coefficient on distribution of effective stress (a) frictionless, μ=0; (b) μ=0.1; and (c) μ=0.3.
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Asperity profile for different nondimensional sliding distance
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Evolution of contact area ratio in frictionless sliding
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Effects of nondimensional mean pressure and friction coefficient on contact area ratio
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Effects of nondimensional Young’s modulus and friction coefficient on contact area ratio
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Idealized geometry of flattened asperity
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Enlarged profile of microwedge
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Comparison between theoretical and numerical wedge angles in pure flattening
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Comparison between theoretical and numerical wedge angles versus nondimensional sliding distance
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Comparison between numerical and experimental results for transverse roughness
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Theoretical and experimental junction-growth coefficients versus nondimensional mean pressure for various experimental conditions

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