Investigations on imperfection sensitivity and deduction of improved knock-down factors for unstiffened CFRP cylindrical shells
Degenhardt, Richard and Kling, Alexander and Bethge, Arne and Orf, Jana and Kärger, Luise and Zimmermann, Rolf and Rohwer, Klaus and Calvi, Adriano (2010) Investigations on imperfection sensitivity and deduction of improved knock-down factors for unstiffened CFRP cylindrical shells. Composite Structures, 92 (8), pp. 1939-1946. Elsevier Ltd.. DOI: 101016/j.compstruct.2009.12.014. ISSN 0263-8223.
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In the field of aerospace engineering but also in the fields of civil and mechanical engineering the industry demands for significantly reduced costs for development and operating. Reduction of structural weight at safe design is one avenue to achieve this objective. In many cases it results in thin-walled structures, which are prone to buckling if subjected to compression or shear. The presented paper is based on a recent European Space Agency (ESA) study, conducted at DLR Braunschweig, on Probabilistic Aspects of Buckling Knock-Down Factors and contributes to this goal by striving for an improved buckling knock-down factor (the ratio of buckling loads of imperfect and perfect structures) for unstiffened CFRP cylindrical shells. Buckling tests and buckling simulations were performed to investigate the imperfection sensitivity and to validate the applied simulation methodologies. Test results as well as deterministic and probabilistic buckling simulation results are presented and compared. Finally, improved knock-down factors are deduced and discussed.
|Title:||Investigations on imperfection sensitivity and deduction of improved knock-down factors for unstiffened CFRP cylindrical shells|
|Journal or Publication Title:||Composite Structures|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1939-1946|
|Keywords:||Cylinder; Knock-down factor; Buckling; Composites; CFRP; Imperfections|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L AR - Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Structures & Materials|
|Institutes and Institutions:||Institute of Composite Structures and Adaptive Systems > Structural Mechanics|
|Deposited By:||Doris Ries|
|Deposited On:||22 Jun 2010 10:00|
|Last Modified:||07 Feb 2013 21:05|
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