NDLI: Shell buckling design criteria based on manufacturing imperfection signatures

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Shell buckling design criteria based on manufacturing imperfection signatures

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hilburger, Mark W. Nemeth, Michael P. Starnes Jr., James H.
Copyright Year	2004
Description	An analysis-based approach .for developing shell-buckling design criteria for laminated-composite cylindrical shells that accurately accounts for the effects of initial geometric imperfections is presented. With this approach, measured initial geometric imperfection data from six graphite-epoxy shells are used to determine a manufacturing-process-specific imperfection signature for these shells. This imperfection signature is then used as input into nonlinear finite-element analyses. The imperfection signature represents a "first-approximation" mean imperfection shape that is suitable for developing preliminary-design data. Comparisons of test data and analytical results obtained by using several different imperfection shapes are presented for selected shells. Overall, the results indicate that the analysis-based approach presented for developing reliable preliminary-design criteria has the potential to provide improved, less conservative buckling-load estimates, and to reduce the weight and cost of developing buckling-resistant shell structures.
File Size	7387349
Page Count	25
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20040077039
Archival Resource Key	ark:/13960/t5p897p4b
Language	English
Publisher Date	2004-05-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Cylindrical Shells Finite Element Method Weight Reduction Graphite-epoxy Composites Shells Structural Forms Signatures Laminates Composite Structures Design Analysis Buckling Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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