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The compressive failure of graphite/epoxy plates with circular holesThe behavior of fiber reinforced composite plates containing a circular cutout was characterized in terms of geometry (thickness, width, hole diameter), and material properties (bending/extensional stiffness). Results were incorporated in a data base for use by designers in determining the ultimate strength of such a structure. Two thicknesses, 24 plies and 48 plies were chosen to differentiate between buckling and strength failures due to the presence of a cutout. Consistent post-buckling strength was exhibited by both laminate configurations.
Document ID
19780016352
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Knauss, J. F. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Starnes, J. H., Jr. (NASA Langley Res. Center Blacksburg, VA, United States)
Henneke, E. G., II (Virginia Polytechnic Inst. and State Univ.)
Date Acquired
September 3, 2013
Publication Date
February 1, 1978
Subject Category
Composite Materials
Report/Patent Number
NASA-CR-157115
VPI-E-78-5
IR-11
Report Number: NASA-CR-157115
Report Number: VPI-E-78-5
Report Number: IR-11
Accession Number
78N24295
Funding Number(s)
CONTRACT_GRANT: NGR-47-004-129
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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