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A stochastic study on the robustness of a stiffened composite structure

Lee, M. and Thomsen, R. and Degenhardt, Richard and Kelly, D.W. (2008) A stochastic study on the robustness of a stiffened composite structure. 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

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 of various designs have been manufactured and tested in compression. In the current pool of experiments it is possible to observe the scatter in results caused by manufacturing defects and material variations. In order to gain more insight into the results, a stochastic framework has been developed where variations are introduced into the finite element analyses and the effects measured. An issue arises as to what the stochastic boundaries should be, and the how this affects the final result. In a bid to understand how the stochastic method can be useful in future analyses a design criterion, robustness, has been used. A qualitative measure of robustness in the form of a Robust Index has been derived so that comparisons between the results achieved can be made.

Document Type:Conference or Workshop Item (Speech)
Title:A stochastic study on the robustness of a stiffened composite structure
Authors:
AuthorsInstitution or Email of Authors
Lee, M.School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney
Thomsen, R.Cooperative Research Centre for Advanced Composite Structures (CRC-ACS) Limited, Fishermans Bend, VIC 3207, Australia
Degenhardt, RichardUNSPECIFIED
Kelly, D.W.School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
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:Robust Design, Stochastics, Collapse, Postbuckling, and COCOMAT
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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