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Design and Analysis of Stiffened Composite Panels Including Postbuckling and Collapse

Degenhardt, Richard and Kling, Alexander and Rohwer, Klaus and Orifici, A. and Thomson, R.S. (2007) Design and Analysis of Stiffened Composite Panels Including Postbuckling and Collapse. Computers and Structures, 86, pp. 919-929. Elsevier Ltd.. DOI: 10.1016/j.compstruc.2007.04.022. ISSN 0045-7949.

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Abstract

he European aircraft industry demands reduced development and operating costs, by 20% and 50% in the short and long term, respectively. Contributions to this aim are provided by the completed project POSICOSS (5th FP) and the running follow-up project COCOMAT (6th FP), both supported by the European Commission. As an important contribution to cost reduction a decrease in structural weight can be reached by exploiting considerable reserves in primary fibre composite fuselage structures through an accurate and reliable simulation of post-buckling up to collapse. The POSICOSS team developed fast procedures for the post-buckling analysis of stiffened fibre composite panels, created comprehensive experimental data bases and derived suitable design guidelines. COCOMAT builds up on the POSICOSS results and considers in addition the simulation of collapse by taking degradation into account. The results comprise an extended experimental data base, degradation models, and improved certification and design tools as well as extended design guidelines. One major task of POSICOSS and COCOMAT is the development of improved analysis tools that are validated by experiments performed within the framework of the projects. Because the new tools must comprise a wide range of various aspects a considerable number of different structures had to be tested. These structures were designed under different objectives (e.g. large post-buckling region). For the design process, the consortiums applied state-of-the-art simulation tools and brought in their own design experience. This paper deals with the design process as performed within both projects and with the applied analysis procedures. It is focused on the DLR experience in the design and analysis of stringer-stiffened CFRP panels gained within the scope of these two projects.

Document Type:Article
Title:Design and Analysis of Stiffened Composite Panels Including Postbuckling and Collapse
Authors:
AuthorsInstitution or Email of Authors
Degenhardt, RichardUNSPECIFIED
Kling, AlexanderUNSPECIFIED
Rohwer, KlausUNSPECIFIED
Orifici, A.School of Aerospace, Mechanical and Manufacturing Engineering, Royal Melbourne Institute of Technology
Thomson, R.S.Cooperative Research Center for Advanced Composite Structures Limited
Date:2007
Journal or Publication Title:Computers and Structures
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:86
DOI:10.1016/j.compstruc.2007.04.022
Page Range:pp. 919-929
Editors:
EditorsEmail
Bathe, K.J.UNSPECIFIED
Topping, B.H.V.UNSPECIFIED
Publisher:Elsevier Ltd.
ISSN:0045-7949
Status:Published
Keywords:Collapse; Post-buckling; Composites; Simulation tools; Experiments; Degradation
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:08 Sep 2008
Last Modified:15 Jan 2010 00:00

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