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Application of generalised beam theory to the study of the stability behaviour of laminated CFRP cylindrical stiffened panels

Silva, N.M. and Degenhardt, Richard and Camotim, D. and Silvestre, N. (2008) Application of generalised beam theory to the study of the stability behaviour of laminated CFRP cylindrical stiffened panels. In: Proceedings of the 2nd International Conference on Buckling and Postbuckling Behaviour of Composite Laminated Shell Structures. 2nd International Conference on Buckling and Postbuckling Behaviour of Composite Laminated Shell Structures, 2008-09-03 - 2008-09-05, Braunschweig, Deutschland.

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Abstract

The paper presents the application of a novel fast numerical tool, based on Generalised Beam Theory (GBT), to perform buckling and post-buckling analyses of laminated CFRP panels. GBT is a beam theory developed for prismatic thinwalled members (e.g., columns, beams or panels), which takes into account both global and local deformations. One of its main features is the fact that the cross-section is discretised into deformation modes with clear mechanical meanings (e.g., global bending, distortional, local-plate, shear and transverse extension deformation modes) − this (i) allows for a better understanding of the member structural behaviour and (ii) makes it possible to perform analyses with very few d.o.f. (by preselecting a set of deformation modes). No stiffness degradation is taken into consideration and the material is deemed linear elastic and orthotropic. One presents numerical results concerning the local buckling and post-buckling behaviour of stiffened CFRP cylindrical panels, including one that was experimental and numerically investigated in the context of the COCOMAT project. The panel deformed configurations and buckling loads obtained with GBT are validated through the comparison with either experimental data or values yielded by shell finite element analyses carried out in the code ABAQUS.

Document Type:Conference or Workshop Item (Speech)
Title:Application of generalised beam theory to the study of the stability behaviour of laminated CFRP cylindrical stiffened panels
Authors:
AuthorsInstitution or Email of Authors
Silva, N.M.Department of Civil Engineering and Architecture, ICIST/IST, Technical University of Lisbon
Degenhardt, RichardUNSPECIFIED
Camotim, D.Department of Civil Engineering and Architecture, ICIST/IST, Technical University of Lisbon
Silvestre, N.Department of Civil Engineering and Architecture, ICIST/IST, Technical University of Lisbon
Date:September 2008
Journal or Publication Title:Proceedings of the 2nd International Conference on Buckling and Postbuckling Behaviour of Composite Laminated Shell Structures
Editors:
EditorsEmail
DLR Braunschweig, UNSPECIFIED
Status:Published
Keywords:generalised beam theory, local buckling and post-buckling, laminated CFRP panels
Event Title:2nd International Conference on Buckling and Postbuckling Behaviour of Composite Laminated Shell Structures
Event Location:Braunschweig, Deutschland
Event Type:international Conference
Event Dates:2008-09-03 - 2008-09-05
Organizer:DLR Braunschweig, Institut für Faserverbundleichtbau und Adaptronik
HGF - Research field:Aeronautics, Space and Transport (old)
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:09 Sep 2008
Last Modified:27 Apr 2009 15:12

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