A Finite Element Study of Elasto-Plastic Hemispherical Contact Against a Rigid Flat

[+] Author and Article Information
Robert L. Jackson, Itzhak Green

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405e-mail: gt2433a@prism.gatech.edu

J. Tribol 127(2), 343-354 (Apr 07, 2005) (12 pages) doi:10.1115/1.1866166 History: Received April 29, 2004; Revised September 08, 2004; Online April 07, 2005
Copyright © 2005 by ASME
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Spherical contact model before contact (a), during mostly elastic deformation (b), and during mostly plastic deformation (c)
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Finite element mesh of a sphere generated by ANSYS™
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FEM predicted contact area
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FEM predicted contact force
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Average contact pressure to yield strength ratio
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Average contact pressure to yield strength ratio
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Progression of change in hardness with deformed geometry
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Predicted average pressure to yield strength ratio for various models
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Displacement at edge of contact area plotted as a function of penetration depth
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Stress plots from ANSYS™, showing the evolution of the stress distribution from (a) elasto-plastic (not yet plastic on surface) to (d) just before fully plastic




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