Numerical Analysis of the Effect of Coating Microstructure on Three-Dimensional Crack Propagation in the Coating Under Rolling Contact Fatigue Conditions

[+] Author and Article Information
I. A. Polonsky, L. M. Keer

Department of Civil Engineering, Northwestern University, Evanston, IL 60208-3109

J. Tribol 124(1), 14-19 (Mar 26, 2001) (6 pages) doi:10.1115/1.1395629 History: Received August 18, 2000; Revised March 26, 2001
Copyright © 2002 by ASME
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Grahic Jump Location
Model of contact-induced cracking in single-layer (a) and multilayer (b) coatings. Cracks are shown as thick black lines. Column width is exaggerated.
Grahic Jump Location
Propagation of a three-dimensional crack through the coating thickness under cyclic contact load, for single-layer (a), two-layer (b), and four-layer (c) coatings. Crack (a) remains planar as it propagates downwards. Crack (b) kinks out of its initial plane at z=2 μm, then continues propagation along a different vertical plane. Crack (c) develops two such kinks: at z=1 μm and z=2 μm.
Grahic Jump Location
Maximum crack depth vs. the number of contact cycles, for three-dimensional crack propagation in single-layer (diamonds), two-layer (crosses), and four-layer (stars) coatings




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