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Experiments on Buckling and Postbuckling of Thin-Walled CFRP Structures using Advanced Measurement Systems

Degenhardt, Richard and Kling, Alexander and Hillger, Wolfgang and Goetting, Hans Christian and Zimmermann, Rolf and Rohwer, Klaus and Gleiter, Andreas (2007) Experiments on Buckling and Postbuckling of Thin-Walled CFRP Structures using Advanced Measurement Systems. International Journal of Structural Stability and Dynamics, 7 (2), pp. 337-358. DOI: 10.1142/S0219455407002253.

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Abstract

The aircraft and space industry strives for significantly reduced development and operating costs. Reduction of structural weight at safe design is one possibility to reach this objective which is aimed by the following two running research projects: the EC project “COCOMAT” and the ESA study “Probabilistic Aspects of Buckling Knock Down Factors”. These projects develop improved concepts and tools for a fast and reliable simulation of the buckling and the postbuckling behavior of thin-walled structures up to collapse, respectively, which allow the exploitation of considerable reserves in primary fibre composite structures in aerospace applications. For the validation of the concepts and tools, a sound database of experiments is needed which is also performed within these projects. This paper focuses on the experimental activities within these projects performed at the buckling test facility of the Institute of Composite Structures and Adaptive Systems (DLR). It presents an overview about the DLR buckling, postbuckling and collapse tests which are already finished and gives an outlook to the results which are expected until the end of the running projects. This paper explains the working of the buckling test facility, the advanced measurement systems, which are running in parallel to the tests, and gives exemplarily two test results. The structures considered are unstiffened cylinders (ESA study) as well as panels, which are understood as sections of cylinders, stiffened by stringers (COCOMAT project). The unstiffened cylinders are more related to space applications (e.g. Ariane busters or parts of the international space station ISS) and the stiffened panels focus more on aircraft structures (e.g. fuselage). The load case considered for all investigations presented in this paper is axial compression under static loading although the test facility is also ready to apply torsion and internal pressure, as well as dynamic axial impact.

Document Type:Article
Title:Experiments on Buckling and Postbuckling of Thin-Walled CFRP Structures using Advanced Measurement Systems
Authors:
AuthorsInstitution or Email of Authors
Degenhardt, RichardUNSPECIFIED
Kling, AlexanderUNSPECIFIED
Hillger, WolfgangUNSPECIFIED
Goetting, Hans ChristianUNSPECIFIED
Zimmermann, RolfUNSPECIFIED
Rohwer, KlausUNSPECIFIED
Gleiter, AndreasUniversität Stuttgart, IKT
Date:June 2007
Journal or Publication Title:International Journal of Structural Stability and Dynamics
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:7
DOI:10.1142/S0219455407002253
Page Range:pp. 337-358
Status:Published
Keywords:Stability, tests, composites structures, buckling, postbuckling, collapse
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:11 Sep 2008
Last Modified:27 Apr 2009 13:52

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