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On the Use of Generalised Beam Theory to assess the Buckling and Post-Buckling Behaviour of Laminated CFRP Cylindrical Stiffened Panels

Silva, Nuno M.F. and Degenhardt, Richard and Camotim, D. and Silvestre, N. (2010) On the Use of Generalised Beam Theory to assess the Buckling and Post-Buckling Behaviour of Laminated CFRP Cylindrical Stiffened Panels. International Journal of Structural Stability and Dynammics, 10 (4), pp. 737-761. Imperial College Press. ISSN 0219-4554.

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Abstract

This paper presents the numerical implementation and illustrates the application and potential of a non-linear elastic Generalised Beam Theory (GBT) beam finite formulation to analyse the post-buckling behaviour of laminated CFRP composite thin-walled prismatic cylindrical panels. This formulation (i) is based on a novel GBT cross-section analysis approach, (ii) accounts for the presence of initial geometrical imperfections and (iii) adopts an incremental iterative solution procedure employing Newton-Raphson’s method and an arc-length control strategy. No stiffness degradation or ply failure is taken into consideration and the material is deemed linear elastic and orthotropic. Numerical results concerning the local buckling and post-buckling behaviour of stiffened CFRP cylindrical panels are presented and discussed  one of these panels was experimentally tested and numerically investigated in the context of the COCOMAT project. Taking full advantage of the GBT unique modal features, one is able (i) to carefully examine the nature of the panel structural response, which is expressed in terms of deformation mode participations, and (ii) to perform analyses involving very few d.o.f. (by pre-selecting a small set of deformation modes). The panel buckling loads and deformed configurations obtained from the GBT analyses are validated through the comparison with either experimental data or values yielded by shell finite element analyses carried out in the code ABAQUS. In order to assess how the curvature affects the panel buckling and initial post-buckling behaviour, a stiffened plate having a width identical to the cylindrical panel is also analysed and the results obtained are compared with those determined for the corresponding curved panels.

Document Type:Article
Title:On the Use of Generalised Beam Theory to assess the Buckling and Post-Buckling Behaviour of Laminated CFRP Cylindrical Stiffened Panels
Authors:
AuthorsInstitution or Email of Authors
Silva, Nuno M.F.Department of Civil Engineering and Architecture, ICIST/IST, Technical University of Lisboa, Portugal
Degenhardt, RichardUNSPECIFIED
Camotim, D.Department of Civil Engineering and Architecture, ICIST/IST, Technical University of Lisboa, Portugal
Silvestre, N.Department of Civil Engineering and Architecture, ICIST/IST, Technical University of Lisboa, Portugal
Date:October 2010
Journal or Publication Title:International Journal of Structural Stability and Dynammics
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:10
Page Range:pp. 737-761
Editors:
EditorsEmail
Yang, Y.B.National Tauwan University
Wang, C.M.National University of Singapore
Reddy, J.N.Texas A&M University
Degenhardt, RichardDLR, Guest Editor
Publisher:Imperial College Press
Series Name:International Journal of Structural Stability and Dynamics
ISSN:0219-4554
Status:Published
Keywords:Thin-walled cylindrical panels; CFRP composites; Generalised Beam Theory (GBT); Local buckling behaviour; Local post-buckling behaviour
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Doris Ries
Deposited On:01 Sep 2010 11:30
Last Modified:26 Mar 2013 13:19

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