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Numerical analysis and parametric studies of the buckling of composite orthotropic compression and shear panelsA computer program is presented which was developed for the combined compression and shear of stiffened variable thickness orthotropic composite panels on discrete springs: boundary conditions are general and include elastic boundary restraints. Buckling solutions are obtained by using a newly developed trigonometric finite difference procedure which improves the solution convergence rate over conventional finite difference methods. The classical general shear buckling results which exist only for simply supported panels over a limited range of orthotropic properties, were extended to the complete range of these properties for simply supported panels and, in addition, to the complete range of orthotropic properties for clamped panels. The program was also applied to parametric studies which examine the effect of filament orientation upon the buckling of graphite-epoxy panels. These studies included an examination of the filament orientations which yield maximum shear or compressive buckling strength for panels having all four edges simply supported or clamped over a wide range of aspect ratios. Panels with such orientations had higher buckling loads than comparable, equal weight, thin skinned aluminum panels. Also included among the parameter studies were examinations of combined axial compression and shear buckling and examinations of panels with rotational elastic edge restraints.
Document ID
19750025358
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Housner, J. M.
(NASA Langley Research Center Hampton, VA, United States)
Stein, M.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1975
Subject Category
Structural Mechanics
Report/Patent Number
NASA-TN-D-7996
L-10083
Accession Number
75N33431
Funding Number(s)
PROJECT: RTOP 505-02-51-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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