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Thermomechanical Postbuckling of ShellsA number of issues involving the postbuckling of doubly-curved panels exposed to a non-uniform temperature field and subjected to a system of mechanical loads are considered in this paper. Effects played by transverse shear, initial geometric imperfections, membrane and thickness-wise temperature gradient, tangential edge constraints, linear/non-linear elastic foundation are incorporated and their implications on the non-linear response behavior of shells are discussed. Issues related with the delay of the occurrence of the snap-through buckling, alleviation of its intensity and even with its removal are addressed and remarks on conditions rendering a curved panel insensitive to initial geometric imperfections are included. Results on small vibration of shells about sub- and post-critical ranges are provided and structural modeling issues playing a non-negligible role towards a reliable prediction of the postbuckling behavior of shells under complex loading conditions are discussed. Results on non-linear response of flat reinforced panels subjected to thermomechanical loads are also presented. Finally, problems not covered by this article are briefly indicated.
Document ID
19980019028
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Librescu, Liviu
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1998
Publication Information
Publication: Stability Analysis of Plates and Shells
Subject Category
Structural Mechanics
Report/Patent Number
AIAA Paper 97-1243
Funding Number(s)
CONTRACT_GRANT: NAG1-1300
Distribution Limits
Public
Copyright
Public Use Permitted.
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