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TECHNICAL PAPERS

An Analysis of a Near-Surface Crack Branching Under a Rigid Indenter

[+] Author and Article Information
David J. Mukai

Louisiana State University, Department of Civil and Environmental Engineering, Baton Rouge, LA 70803-6405 e-mail: dmukai@lsu.edu

J. Tribol 122(1), 23-29 (Mar 29, 1999) (7 pages) doi:10.1115/1.555325 History: Received June 25, 1998; Revised March 29, 1999
Copyright © 2000 by ASME
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References

Figures

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Subsurface crack problem configuration
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An element and its sub-sections
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Typical dislocation density distribution for a short branch crack
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Comparison with Sheppard; mode I SIF versus distance from crack tip
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Comparison with Miller; SIF range versus extension angle
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Nondimensional mode I and mode II SIFs, KIR/P and KIIR/P, versus nondimensional contact location, xc/R, for θ=20 deg and d/a=0.7
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Nondimensional mode I SIF range, ΔKIR/P versus extension angle, θ, for d/a=0.7
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Hypothetical ΔKI-ΔKII two-space description of a specimen
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Hypothetical ΔKI-ΔKII two-space parameter study
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ΔKII-ΔKI two-space for increasing crack length; indenter footprint c=0.1R, contact friction f=0, and crack face friction cff=0.5
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ΔKII-ΔKI two-space for increasing crack length; indenter footprint c=0.5R, contact friction f=0, and crack face friction cff=0.5
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ΔKII-ΔKI two-space for decreasing crack depth for indenter footprint c=0.1R. Respective points on the three curves correspond to the same d/R values. 0.25<d/R<2.
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ΔKII-ΔKI two-space for decreasing crack depth for indenter footprint c=1R. Respective points on the three curves correspond to the same d/R values. 0.25<d/R<2.
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τyx−cffσyy contours under an indenter with footprint c=R

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