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Influence of local fiber undulations on the global buckling behavior of filament-wound cylindersThe predicted compressive stiffness and buckling strength of filament-wound cylinders using classical lamination theory is significantly higher than those observed experimentally. This discrepancy is partially influenced by the variation of mechanical properties in the region of fiber undulations. These regions are localized geometric defects intrinsic to the filament-winding, weaving, and braiding processes. In the present work, the average mechanical properties of the fiber undulation region are quantified using modified models of woven-fabric composites to account for the 3-dimensional effects. The mechanical properties thus determined can be incorporated as local element properties into global finite-element models. Preliminary results from large-displacement analyses of filament-wound cylinders are relatively more accurate when fiber undulations are accounted for.
Document ID
19930065317
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jensen, D. W.
(NASA Langley Research Center Hampton, VA, United States)
Pai, S. P.
(Pennsylvania State Univ. University Park, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Journal of Reinforced Plastics and Composites
Volume: 12
Issue: 8
ISSN: 0731-6844
Subject Category
Structural Mechanics
Accession Number
93A49314
Funding Number(s)
CONTRACT_GRANT: NAG1-982
Distribution Limits
Public
Copyright
Other

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