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The single perturbation load approach applied to imperfection sensitive conical composite structures

Khakimova, Regina and Warren, Christopher J. and Zimmermann, Rolf and Castro, Saullo and Arbelo, Mariano and Degenhardt, Richard (2014) The single perturbation load approach applied to imperfection sensitive conical composite structures. Thin-Walled Structures, 84, pp. 369-377. Elsevier. doi: 10.1016/j.tws.2014.07.005. ISSN 0263-8231.

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Official URL: http://ac.els-cdn.com/S0263823114002183/1-s2.0-S0263823114002183-main.pdf?_tid=149fd596-2967-11e4-9ad1-00000aab0f6b&acdnat=1408648523_11c8ab4306dc3d6deeb29c2fd09ee73c


The importance of taking into account geometric imperfections for cylindrical and conical thin-walled structures prone to buckling had been already recognized by the fi rst authors dealing with new formulations. Nowadays, the analysts still use empirically based lower-bound methods such as the NASA SP-8007 guideline to calculate the required knock-down factors (KDFs), which does include important mechanical properties of laminated composite materials, such as the stacking sequence. New design approaches that allow taking full advantage of composite materials are required. The single perturbation load approach (SPLA), a new deterministic approach fi rst proposed by Hühne, will be investigated with unstiffened composite conical structures varying the geometry, lamina and layup. The SPLA's capability for predicting KDF is compared with the NASA approach. The SPLA was applied to the geometrically perfect structures and to the structure with geometric imperfections of two types, mid-surface imperfections and thickness imperfections. The study contributes to the European Union (EU) project DESICOS, whose aim is to develop less conservative design guidelines for imperfection sensitive thin-walled structures.

Item URL in elib:https://elib.dlr.de/90348/
Document Type:Article
Title:The single perturbation load approach applied to imperfection sensitive conical composite structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Warren, Christopher J.University of New South WalesUNSPECIFIED
Castro, SaulloPFH GöttingenUNSPECIFIED
Arbelo, MarianoPFH GöttingenUNSPECIFIED
Degenhardt, RichardDLRUNSPECIFIED
Date:August 2014
Journal or Publication Title:Thin-Walled Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 369-377
Keywords:Buckling, Knock-down factor, Design, Composite, Imperfections, Truncated conical Shell
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Raumfahrzeugsysteme - HL-Primärstrukturen für Orbitale Systeme (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Degenhardt, Richard
Deposited On:25 Aug 2014 11:14
Last Modified:20 Jun 2021 15:45

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