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TECHNICAL PAPERS

Effect of Surface Patterning on Contact Deformation of Elastic-Plastic Layered Media

[+] Author and Article Information
Z.-Q. Gong, K. Komvopoulos

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

J. Tribol 125(1), 16-24 (Dec 31, 2002) (9 pages) doi:10.1115/1.1501086 History: Received January 15, 2002; Revised June 14, 2002; Online December 31, 2002
Copyright © 2003 by ASME
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References

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Kral,  E. R., and Komvopoulos,  K., 1997, “Three-Dimensional Finite Element Analysis of Subsurface Stress and Strain Fields Due to Sliding Contact on an Elastic-Plastic Layered Medium,” ASME J. Tribol., 119, pp. 332–341.
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Figures

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Schematics of layered media with (a) meandered and (b) sinusoidal surfaces and pertinent nomenclature of geometry parameters
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Finite element mesh of layered medium with a sinusoidal surface: (a) mesh of first and second layers and (b) mesh of entire layered medium
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Contact pressure profiles of layered media with meandered surfaces (S/R=0.125 and μ=0.5): (a) b/a=0.5, (b) b/a=1, and (c) b/a=2. (The pressure profile of a layered medium with a flat surface (b/a=0) is shown by a discontinuous curve.)
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Contact pressure profiles of layered media with sinusoidal surfaces (S/R=0.125 and μ=0.5): (a) δ/λ=0.008, (b) δ/λ=0.016, and (c) δ/λ=0.032. (The pressure profile of a layered medium with a flat surface (δ/λ=0) is shown by a discontinuous curve.)
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Variation of σxx stress at the surface of layered media with sinusoidal surfaces (S/R=0.5 and μ=0.5): (a) δ/λ=0.008, (b) δ/λ=0.016, and (c) δ/λ=0.032. (The surface stress distribution for a layered medium with a flat surface (δ/λ=0) is shown by a discontinuous curve.)
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Variation of σxx stress at the surface of layered media with sinusoidal surfaces (S/R=0.5 and μ=0.1): (a) δ/λ=0.008, (b) δ/λ=0.016, and (c) δ/λ=0.032. (The surface stress distribution for a layered medium with a flat surface (δ/λ=0) is shown by a discontinuous curve.)
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Maximum first principal stress σ1max versus sliding distance S/R in (a) first (hard) layer and (b) second (soft) layer of layered media with flat and sinusoidal surfaces (μ=0.5)
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Contours of equivalent plastic strain ε̄p in layered media with sinusoidal surfaces (δ/λ=0.032) for different friction coefficients (S/R=0.5): (a) μ=0.5 and (b) μ=0.1
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Maximum plastic strain ε̄pmax in the second (soft) layer of layered media with (a) meandered and (b) sinusoidal surfaces versus sliding distance S/R(μ=0.5). (Stress results for b/a=0 and δ/λ=0 in (a) and (b), respectively, are for a layered medium with a flat surface.)
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Contact pressure concentration factor Kp for layered media with sinusoidal surfaces versus indentation depth d/R (μ=0.5)
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Maximum von Mises equivalent stress σMmax in the first (hard) layer of layered media with sinusoidal surfaces versus indentation depth d/R (μ=0.5)
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Maximum von Mises equivalent stress σMmax in the first (hard) layer of layered media with sinusoidal surfaces (δ/λ=0.016) versus indentation depth d/R and elastic modulus ratio of first-to-second layer E1/E2 (μ=0.5)
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Comparison of analytical and finite element results for the maximum von Mises equivalent stress σMmax in the first (hard) layer of layered media with sinusoidal surfaces versus indentation depth d/R (μ=0.5)

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