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Thermal postbuckling of thin-walled composite stiffenersA study is made of the thermal postbuckling response of composite stiffeners subjected to prescribed edge displacement and a temperature rise. The flanges and web of the stiffeners are modeled by using two-dimensional plate finite elements. A mixed formulation is used with the fundamental unknowns consisting of the generalized displacements and the stress resultants of the plate. A reduction method is used in conjunction with mixed finite element models for determining the postbuckling response of the stiffeners. Sensitivity derivatives are evaluated and used to study the effects of variations in the different lamination and material parameters of the stiffeners on their postbuckling response characteristics. Numerical studies are presented for anisotropic stiffeners with Zee and channel sections.
Document ID
19910065354
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Noor, Ahmed K.
(NASA Langley Research Center Hampton, VA, United States)
Peters, J. M.
(NASA Langley Research Center; Virginia, University Hampton, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Computing Systems in Engineering
Volume: 2
Issue: 1 19
ISSN: 0956-0521
Subject Category
Structural Mechanics
Accession Number
91A49977
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-90-0369
CONTRACT_GRANT: NCCW-0011
Distribution Limits
Public
Copyright
Other

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