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Experimental validation of the vibration correlation technique robustness to predict buckling of unstiffened composite cylindrical shells

Franzoni, Felipe and Odermann, Falk and Lanbans, Edgars and Bisagni, Chiara and Arbelo, Mariano Andrés and Degenhardt, Richard (2019) Experimental validation of the vibration correlation technique robustness to predict buckling of unstiffened composite cylindrical shells. Composite Structures, 224, p. 111107. Elsevier. DOI: 10.1016/j.compstruct.2019.111107 ISSN 0263-8223

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S0263822319305574

Abstract

Considering the design of aerospace structures, an experimental campaign is essential for validating the sizing methodology and margins of safety. Particularly for buckling-critical cylindrical shells, the traditional buckling test could lead the specimen to permanent damage. Therefore, the validation of nondestructive experimental procedures for estimating the buckling load of imperfection-sensitive structures from the prebuckling stage is receiving more attention from the industry. In this context, this paper proposes an experimental verification of the robustness of a vibration correlation technique developed for imperfection-sensitive structures. The study comprises three nominally identical unstiffened composite laminated cylindrical shells. Each specimen is tested 10 times for buckling at DLR and, the reproducible results — within a small range of deviation between them — corroborate the equivalence of the cylinders. For the robustness assessment of the vibration correlation technique, two different buckling test facilities are considered. Furthermore, the material properties are recalculated through composite composition rules and the influence of enhanced theoretical buckling loads on the VCT predictions is verified. The experimental campaigns corroborate that the vibration correlation technique provides appropriate estimations representing the influence of the different test facilities; moreover, enhanced theoretical buckling loads can improve the predictions for some of the test cases.

Item URL in elib:https://elib.dlr.de/127845/
Document Type:Article
Title:Experimental validation of the vibration correlation technique robustness to predict buckling of unstiffened composite cylindrical shells
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Franzoni, FelipeFelipe.Franzoni (at) dlr.deUNSPECIFIED
Odermann, FalkFalk.Odermann (at) dlr.deUNSPECIFIED
Lanbans, EdgarsE.Labans (at) tudelft.nlUNSPECIFIED
Bisagni, ChiaraC.Bisagni (at) tudelft.nlUNSPECIFIED
Arbelo, Mariano Andrésmarbelo (at) ita.brUNSPECIFIED
Degenhardt, RichardRichard.Degenhardt (at) dlr.deUNSPECIFIED
Date:September 2019
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:224
DOI :10.1016/j.compstruct.2019.111107
Page Range:p. 111107
Publisher:Elsevier
ISSN:0263-8223
Status:Published
Keywords:Nondestructive experiments, Vibration Correlation Technique, Unstiffened composite laminated cylindrical shells, Buckling, Imperfection-sensitive structures
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Franzoni, Felipe
Deposited On:21 Jun 2019 09:51
Last Modified:21 Jun 2019 09:51

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