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Type: Journal article
Title: Dynamic instability analysis of laminated composite stiffened shell panels subjected to in-plane harmonic edge loading
Author: Patel, S.
Datta, P.
Sheikh, A.
Citation: Structural Engineering and Mechanics, 2006; 22(4):483-510
Publisher: Techno-Press
Issue Date: 2006
ISSN: 1225-4568
Abstract: The dynamic instability characteristics of laminated composite stiffened shell panels subjected to in-plane harmonic edge loading are investigated in this paper. The eight-noded isoparametric degenerated shell element and a compatible three-noded curved beam element are used to model the shell panels and the stiffeners respectively. As the usual formulation of degenerated beam element is found to overestimate the torsional rigidity, an attempt has been made to reformulate it in an efficient manner. Moreover the new formulation for the beam element requires five degrees of freedom per node as that of shell element. The method of Hill? infinite determinant is applied to analyze the dynamic instability regions. Numerical results are presented to demonstrate the effects of various parameters like shell geometry, lamination scheme, stiffening scheme, static and dynamic load factors and boundary conditions, on the dynamic instability behaviour of laminated composite stiffened panels subjected to in-plane harmonic loads along the boundaries. The results of free vibration and buckling of the laminated composite stiffened curved panels are also presented.
Keywords: buckling
composite stiffened shell panels
degenerated curved beam element
degenerated shell element
dynamic instability
finite element method
in-plane load and vibration
Description: Copyright © 2006 Techno Press
DOI: 10.12989/sem.2006.22.4.483
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Appears in Collections:Aurora harvest
Civil and Environmental Engineering publications

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