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Stiffener attachment concepts for graphite-epoxy panels designed for postbuckling strengthStiffener attachment concepts for suppressing or delaying the onset of the skin-stiffener separation failure mode in graphite-epoxy compression panels designed for postbuckling strength were experimentally studied. The effectiveness of these concepts was evaluated using panels with 16-ply skins and a single centrally-located I-shaped stiffener with both static and cyclic compressive loadings. Analytical results suggest that tailoring the relative thicknesses of the panel skin, stiffener attachment flange, and the stiffener web rotational stiffness can minimize the adverse effects of high interface shear and normal stresses. Interface stress levels may be reduced by tapering the thickness of the stiffener attachment flange and properly selecting the stacking sequences of the skin and stiffener attachment flange laminates.
Document ID
19930063023
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dickson, John N.
(NASA Langley Research Center Hampton, VA, United States)
Biggers, Sherrill B.
(Lockheed-Georgia Co. Marietta, United States)
Starnes, James H., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1985
Subject Category
Structural Mechanics
Meeting Information
Meeting: DOD and NASA, Conference on Fibrous Composites in Structural Design
Location: Denver, CO
Country: United States
Start Date: June 17, 1985
End Date: June 20, 1985
Sponsors: DOD, NASA
Accession Number
93A47020
Distribution Limits
Public
Copyright
Other

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