TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Contact Stresses in Dovetail Attachments: Physical Modeling

[+] Author and Article Information
G. B. Sinclair

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803-6413

N. G. Cormier

General Electric Aircraft Engines, 1 Neumann Way, Cincinnati, OH 45215

J. Eng. Gas Turbines Power 124(2), 325-331 (Mar 26, 2002) (7 pages) doi:10.1115/1.1415740 History: Received November 01, 1999; Revised February 01, 2000; Online March 26, 2002
Copyright © 2002 by ASME
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Dovetail attachment configuration: (a) section of overall attachment, (b) closeup of contact region, (c) closeup of disk near lower contact point with stresses acting
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Contact stress distribution (μ=0)
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Slipping in the presence of lateral deformation: (a) cork pressed into two inclined walls, (b) free-body diagram for the cork
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Free-body diagram of half of the blade section
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Comparison of nominal contact stresses (μ=0.4)
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Comparison of peak contact stresses (μ=0)
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Approximate decomposition near the edge of contact
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Surface stresses for sliding roller: (a) contact and hoop stresses without friction, (b) shear and hoop stresses due to friction
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Comparison of hoop stresses
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Hoop stress variation near the edge of contact for 20 percent unloading (μ=0.4)




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