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Collapse of Composite Cylinders in BendingThis paper summarizes the results of a numerical and experimental study of the collapse behavior of small-scale graphite-epoxy cylindrical shells subjected to overall bending loads, and in one case, an initial internal pressure. Shells with quasi-isotropic and orthotropic inplane stiffness properties are studied. Numerical results from geometrically nonlinear finite element analyses and results from experiments using a specially-built apparatus indicate that extensive stable postbuckling responses occur. Orthotropy influences the buckling values and the extent to which the bending moment decreases after buckling. Material damage is observed to initiate in the vicinity of the nodal lines of the postbuckled deflection patterns. Numerical results indicate that the magnitudes of the shear stress resultants are greatest in these nodal regions. Failure of the internally pressurized cylinder is catastrophic.
Document ID
19980019026
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Fuchs, Hannes P.
(General Motors Research Labs. Warren, MI United States)
Starnes, James H., Jr.
(NASA Langley Research Center Hampton, VA United States)
Hyer, Michael W.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1998
Publication Information
Publication: Stability Analysis of Plates and Shells
Subject Category
Structural Mechanics
Report/Patent Number
AIAA Paper 97-1241
Funding Number(s)
CONTRACT_GRANT: NAG1-343
Distribution Limits
Public
Copyright
Public Use Permitted.
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