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TECHNICAL PAPERS

Three-Dimensional Contact Analysis of Elastic-Plastic Layered Media With Fractal Surface Topographies

[+] Author and Article Information
K. Komvopoulos, N. Ye

Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Tribol 123(3), 632-640 (Jul 25, 2000) (9 pages) doi:10.1115/1.1327583 History: Received February 21, 2000; Revised July 25, 2000
Copyright © 2001 by ASME
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References

Figures

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(a) Normalized mean contact pressure and (b) ratio of truncated to real contact areas versus representative strain
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Comparison of analytical and finite element results for the normalized mean contact pressure versus representative strain for a homogeneous medium
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Finite element mesh of the layered medium
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Normalized mean contact pressure versus representative strain for a layered medium with different layer thickness
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Normalized radius of real contact area for a layered medium with different layer thickness
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Comparison of analytical and simulation results for the truncated total contact area versus largest truncated microcontact area
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Simulated three-dimensional fractal surface equivalent to the head-disk interface (D=2.44,G=9.46×10−13 m,M=10,γ=1.5, and L=1 μm)
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Power spectrum of the fractal surface shown in Fig. 7
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Schematic of a tri-pad picoslider showing the apparent contact area at the trailing edge of the center-pad used in the surface contact simulations
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(a) Contact load and (b) ratio of real to apparent contact area versus maximum surface interference for a homogeneous medium with carbon overcoat material properties (D=2.44,G=9.46×10−13 m,M=10,γ=1.5, and L=1 μm)
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Effect of fractal dimension D on (a) contact load, (b) ratio of real to apparent contact area, and (c) ratio of inelastic portion of real contact area to apparent contact area versus maximum surface interference distance for a homogeneous medium with carbon overcoat material properties (G=9.46×10−13 m,M=10,γ=1.5, and L=1 μm)
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Effect of fractal roughness G on (a) contact load, (b) ratio of real to apparent contact area, and (c) ratio of inelastic portion of real contact area to apparent contact area versus maximum surface interference distance for a homogeneous medium with carbon overcoat material properties (D=2.44,M=10,γ=1.5, and L=1 μm)
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(a) Contact load and (b) ratio of inelastic portion of real contact area to apparent contact area versus maximum surface interference for a homogeneous medium with carbon overcoat material properties and a layered medium consisting of a carbon overcoat with thickness 2, 5, and 10 nm and a substrate with magnetic medium material properties (D=2.44,G=9.46×10−13 m,M=10,γ=1.5, and L=1 μm)
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(a) Elastic and (b) plastic (including both elastic-plastic and fully plastic) contact load components versus maximum surface interference for a homogeneous medium with carbon overcoat material properties and a layered medium consisting of a carbon overcoat with thickness 2, 5, and 10 nm and a substrate with magnetic medium material properties (D=2.44,G=9.46×10−13 m,M=10,γ=1.5, and L=1 μm)

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