Abstract
The performance goals of future aerospace vehicles will require an unprecedented degree of structural efficiency, which can be obtained by an advanced design methodology, often called “high-fidelity analysis”. Such a methodology combines accumulated geometrical, material and loading imperfections and boundary- condition data with the available computer codes. The prerequisite for a successful application of such a high fidelity analysis to shell type structures is the existence of data banks of measured imperfections and data on the effective boundary conditions. These data banks have to be not only extensive, but also well correlated with the relevant manufacturing processes, loading conditions and practical end fixtures. The experimental work on stiffened metal shells that produced the available data banks is briefly reviewed and their present limitations are emphasized. The urgent need for coordinated extensive international efforts by industry and research laboratories to measure imperfections and effective boundary conditions, and correlate them with experimental buckling loads as well as fabrication processes, is emphasized. Nondestructive vibration correlation techniques are also briefly discussed as a means for determining the effective boundary conditions. Finally, assuming that the necessary prerequisites will become available, the consecutive stages of the advanced design methodology are outlined.
Sponsored in part by the Jordan and Irene Tark Aerospace Structures Fund. Extended version originally presented at the 42nd AIAA/ASME/ASCE/AHS Structures, Structural Dynamics and Materials Conference, Seattle WA, April 16–19, 2001, and published there as AIAA Paper No. 2001–1396.
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Singer, J., Abramovich, H., Weller, T. (2002). The Prerequisites for an Advanced Design Methodology in Shells Prone to Buckling. In: Drew, H.R., Pellegrino, S. (eds) New Approaches to Structural Mechanics, Shells and Biological Structures. Solid Mechanics and Its Applications, vol 104. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9930-6_30
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