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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Load History Effects on Fretting Contacts of Isotropic Materials

[+] Author and Article Information
P. T. Rajeev

GE Superabrasives, 6325 Huntley Road, Worthington, OH 43085e-mail: Rajeev.pakalapati@gesm.ge.com

H. Murthy, T. N. Farris

School of Aeronautics & Astronautics, Purdue University, 315 North Grant Street, West Lafayette, IN 47907-2023

J. Eng. Gas Turbines Power 126(2), 385-390 (Jun 07, 2004) (6 pages) doi:10.1115/1.1689364 History: Received December 01, 2001; Revised March 01, 2002; Online June 07, 2004
Copyright © 2004 by ASME
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References

Figures

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(a) Typical attachment load history, (b) example load history
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Schematic of two elastic bodies in partial slip contact. a1 and a2 denote the ends of the contact zone and b1 and b2 denote the end of the stick zones.
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The evolution of the contact and stick zones and the “slip lock” phenomenon that occurs during the incremental indentation of an elastic half-space by a rigid surface
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Stick zone size as a function of the coefficient of friction. The values of b/a obtained by solving the coupled singular integral equations incrementally are in good agreement to those obtained by Spence 7 using a self-similar analysis.
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Shear traction results when a rigid cylinder is brought into contact with a Ti-6Al-4V half-space for two different load histories (P=1.75 MN/m,Q=0.35 MN/m)
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Shear traction results when a cylinder made from Inco718 alloy is brought into contact with a Ti-6Al-4V half-space for two different load histories (P=1.75 MN/m,Q=0.53 MN/m)
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Mission points 19, and 20 with Ti-6Al-4V cylinder contacting Ti-6Al-4V half-space
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Mission points, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12
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Mission points 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24
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Mission points 25, 26, and 27
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Change in shear traction due to a 2% increase in normal load and keeping the shear load and moment constant. The initial distribution of the shear traction is shown in Fig. 8(c). Note that a and b denote the size of the contact zone and the size of the stick zone, respectively.

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