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A Hierarchical Approach to Buckling Load CalculationsThe advantages of using a hierarchical analysis approach to calculate the buckling load of an axially compressed composite cylindrical shell is demonstrated using an example taken from a recent experimental program. The Delft Interactive Shell DEsign COde (DISDECO) shell design code is used for this hierarchical analysis approach to provide an accurate prediction of the critical buckling load of the actual shell structure. DISDECO includes the influence of the boundary conditions, initial geometric imperfections, the effects of stiffener and load eccentricities, and the effects of prebuckling deformations caused by edge constraints in the analysis. It is shown that the use of DISDECO makes it relatively simple to proceed step by step from simple to more complex models and solution procedures. As a final step in the hierarchical analysis approach, the critical buckling load and the estimated imperfection sensitivity of the shell are verified by conducting an analysis of a large finite element model with one of the current generation two-dimensional shell analysis codes with advanced capabilities needed to represent both geometric and material nonlinearities.
Document ID
19990087337
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Arbocz, Johann
(Technische Univ. Delft, Netherlands)
Starnes, James H.
(NASA Langley Research Center Hampton, VA United States)
Nemeth, Michael P.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publisher: American Inst. of Aeronautics and Astronautics
Subject Category
Structural Mechanics
Report/Patent Number
AIAA Paper 99-1232
Funding Number(s)
CONTRACT_GRANT: NAG1-1826
Distribution Limits
Public
Copyright
Other

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