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TECHNICAL PAPERS

On the Mechanics of Crack Initiation and Propagation in Elasto-Plastic Materials in Impact Fretting Wear

[+] Author and Article Information
Y. B. Gessesse

Cummins Technical Center, Cummins Inc., Columbus, IN, USA

M. H. Attia

Department of Mechanical Engineering, Concordia University, Montreal, Quebec, Canada

J. Tribol 126(2), 395-403 (Apr 19, 2004) (9 pages) doi:10.1115/1.1491975 History: Received February 10, 2000; Revised February 28, 2002; Online April 19, 2004
Copyright © 2002 by ASME
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References

Figures

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Shear stress-strain curve of elasto-plastic material with bi-linear isotropic hardening properties
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Finite element model of a two-dimensional plane strain domain including a cylindrical hard inclusion (the inset shows a close up of the contact zone and the region surrounding the inclusion)
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Contour plot of normalized radial interfacial stress σrr/k around an inclusion, for p0=4k, μ=0, c1=0.1, and c2=0.01
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Contour plots of the residual stresses σxryr, and τxyr near the contact zone, for p0=5k, μ=0, c1=0.1, and c2=0.01
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Effect of contact pressure p0 on the extent of the plastically deformed zone, for p0=4k and 6k (μ=0, c1=0.1, and c2=0.01)
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Effect of the process variables on the normalized radial interfacial stress σrr/k in the contact region, for a bi-linear strain hardening material with c1=0.1 and c2=0.01: (a) p0=4k, μ=0 (b) p0=6k, μ=0, (c) p0=4k, μ=0.3, and (d) p0=6k, μ=0.1.
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Finite element idealization for crack propagation: (a) solid domain containing a propagating crack parallel to the surface, and (b) a close up of the contact zone.
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Effect of the crack length lc on change in the effective stress around a crack, for (a) lc/a=0.4, (b) lc/a=1, and (c) lc/a=2 (other operating conditions: p0=5k, μ=0, μc=0,h/a=1,c1=0.1, and c2=0.01)
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Effect of the crack length lc on the crack propagation rate dlc/dN, for (a) p0=5k,μ=μc=0,c1=0.1, and c2=0.02; and (b) p0=4k,μ=μc=0,c1=0.1, and c2=0.01.

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