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Effective Widths of Compression-Loaded Plates With a CutoutA study of the effects of cutouts and laminate construction on the prebuckling and initial postbuckling stiffnesses, and the effective widths of compression-loaded, laminated-composite and aluminum square plates is presented. The effective-width concept is extended to plates with cutouts, and experimental and nonlinear finite-element analysis results are presented. Behavioral trends are compared for seven plate families and for cutout-diameter-to-plate-width ratios up to 0.66. A general compact design curve that can be used to present and compare the effective widths for a wide range of laminate constructions is also presented. A discussion of how the results can be used and extended to include certain types of damage, cracks, and other structural discontinuities or details is given. Several behavioral trends are described that initially appear to be nonintuitive. The results demonstrate a complex interaction between cutout size and plate orthotropy that affects the axial stiffness and effective width of a plate subjected to compression loads.
Document ID
20000109795
Acquisition Source
Langley Research Center
Document Type
Technical Publication (TP)
Authors
Hilburger, Mark W. (NASA Langley Research Center Hampton, VA United States)
Nemeth, Michael P. (NASA Langley Research Center Hampton, VA United States)
Starnes, James H., Jr. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
October 1, 2000
Subject Category
Structural Mechanics
Report/Patent Number
NAS: 1.21:210538
NASA/TP-2000-210538
L-18004
Meeting Information
Meeting: 41st AIAA/ASME/ASCE/ASC/ASH Structures, Structural Dynamics, and Materials Conference
Location: Atlanta, GA
Country: United States
Start Date: April 3, 2000
End Date: April 6, 2000
Funding Number(s)
PROJECT: RTOP 522-11-41-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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