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Imperfection investigation of composite stiffened fuselage panels for Postbuckling analyses

Lee, Merril and Thomson, Rodney and Degenhardt, Richard and Kelly, Don (2008) Imperfection investigation of composite stiffened fuselage panels for Postbuckling analyses. 5th International Conference on Thin-Walled Structures, 18.-20. June 2008, Brisbane, Australia.

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Abstract

Project COCOMAT is an ongoing four year European Commission project aimed at exploiting the large reserve of strength in composite structures through more accurate prediction of collapse. As part of the research program, curved stiffened composite panels have been manufactured and tested in compression. During the experiments, it was noted that the panels were highly imperfection sensitive. Imperfections in the structure contributed to variations in the postbuckling mode shape as well as the collapse load. The inability of deterministic finite element analyses to easily capture these variations means that it is difficult to match simulation with experiment. Therefore the use of stochastic finite element analyses has been proposed. In order for realistic stochastic simulations to be conducted, there is a need to investigate the actual variability and imperfections that exist in the manufactured panels. A library of imperfections and variations has been collated and the initial geometrical imperfections that exist before testing have been accounted for.

Item URL in elib:https://elib.dlr.de/83818/
Document Type:Conference or Workshop Item (Speech)
Title:Imperfection investigation of composite stiffened fuselage panels for Postbuckling analyses
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lee, MerrilRMIT, Melbourne, AustraliaUNSPECIFIED
Thomson, RodneyCRC-ACSUNSPECIFIED
Degenhardt, RichardUNSPECIFIEDUNSPECIFIED
Kelly, DonUNSW, Sydney, AustraliaUNSPECIFIED
Date:2008
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Postbuckling, Collapse, Stiffened Structures, Variability, Imperfection Sensitive, COCOMAT
Event Title:5th International Conference on Thin-Walled Structures
Event Location:Brisbane, Australia
Event Type:international Conference
Event Dates:18.-20. June 2008
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old), L - Structures & Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Degenhardt, Richard
Deposited On:10 Dec 2013 19:21
Last Modified:31 Jul 2019 19:41

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