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TECHNICAL PAPERS

Effect of Coating Geometry on Contact Stresses in Two-Dimensional Discontinuous Coatings

[+] Author and Article Information
Sunil Ramachandra, Timothy C. Ovaert

University of Notre Dame, Aerospace and Mechanical Engineering Department, Notre Dame, IN 46556

J. Tribol 122(4), 665-671 (Apr 17, 2000) (7 pages) doi:10.1115/1.1310333 History: Received September 03, 1999; Revised April 17, 2000
Copyright © 2000 by ASME
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References

Figures

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Discontinuous coating contact model
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Loading conditions and geometry of the physical model
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The rough layered contact model from Cole and Sayles 12
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Normal pressure from Hertz theory and the numerical analysis, identical layer and substrate properties
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Qualitative representations of normal pressure distributions for various coating geometries
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Surface normal pressure, 20 O/1 T coating: (a) numerical model results; (b) finite element results.
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Surface normal pressure, numerical model results. Friction coefficient=0.35. (a) 20 O/1 T, 60 O/3 T coatings; (b) 40 O/0.5 T, 40 O/2 T coatings. Discontinuous coating pressure distributions are symmetric about X=0.
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Surface normal pressure, numerical model results. Friction coefficient=0.35. Crown radius=51 mm. (a) 20 O/1 T, 60 O/3 T coatings. (b) 40 O/0.5 T, 40 O/2 T coatings. Discontinuous coating pressure distributions are symmetric about X=0.
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Surface normal pressure, numerical model results. Friction coefficient=0.35. Crown radius=25 mm. 20 O/1 T, 60 O/3 T coatings. Discontinuous coating pressure distributions are symmetric about X=0.
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Surface normal pressure, numerical model results. Friction coefficient=0.35. Crown radius=5 mm. 20 O/1 T, 60 O/3 T coatings. Discontinuous coating pressure distributions are symmetric about X=0.
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Coating interfacial σxx stress. Numerical model results. Friction coefficient=0.35. Crown radius=51 mm: (a) 20 O/1 T, 60 O/3 T coatings; (b) 40 O/0.5 T, 40 O/2 T.
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Coating interfacial σxx stress. Numerical model results. Friction coefficient=0.35. Crown radius=25 mm: (a) 20 O/1 T, 60 O/3 T coatings; (b) 40 O/0.5 T, 40 O/2 T.
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Coating interfacial σxx stress. Numerical model results. Friction coefficient=0.35. Crown radius=5 mm: (a) 20 O/1 T, 60 O/3 T coatings; (b) 40 O/0.5 T, 40 O/2 T.
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Coating interfacial σxx stress. Numerical model results. 40 O/0.5 T coating: (a) 51 mm crown radius; (b) 5 mm crown radius.

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