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A Robustness-Based Design Strategy for Composite Structures

da Cunha, Fábio Ribeiro Soares and Wille, Tobias and Degenhardt, Richard and Sinapius, Michael and de Araújo, Francisco Célio and Zimmermann, Rolf (2014) A Robustness-Based Design Strategy for Composite Structures. Aircraft Engineering and Aerospace Technology, 86 (4), pp. 274-286. Emerald Group Publishing Ltd.. doi: 10.1108/AEAT-04-2013-0070. ISBN 1748-8842. ISSN 1748-8842.

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Official URL: http://www.emeraldinsight.com/1748-8842.htm


Purpose – This paper aims to present a new robustness-based design strategy for thin-walled composite structures under compressive loading, which combines strength requirements in terms of the limit and ultimate load with robustness requirements evaluated from the structural energy until collapse. Design/methodology/approach – In order to assess the structural energy, the area under the load-shortening curve between several characteristic points such as local buckling, global buckling, onset of degradation and collapse load is calculated. In this context, a geometrically nonlinear finite element analysis is carried out, in which the ply properties are selectively degraded by progressive failure. Findings – The advantage of the proposed methodology is observed by analyzing unstiffened composite plates under compressive loading, wherein the lightest plate that satisfies both strength and robustness requirements can be attained. Practical implications – As a practical implication, this methodology gives a new argument to accept the collapse load close to the ultimate load once robustness is ensured. Originality value – The structural energy is employed to investigate the robustness of thin-walled composite structures in postbuckling, and new energy-based robustness measures are proposed. In the design of composite structures, this innovative strategy might lead to a more robust design when compared to an approach that only accounts for the ultimate load.

Item URL in elib:https://elib.dlr.de/90100/
Document Type:Article
Title:A Robustness-Based Design Strategy for Composite Structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
da Cunha, Fábio Ribeiro SoaresDLRUNSPECIFIED
Degenhardt, RichardDLRUNSPECIFIED
de Araújo, Francisco CélioFederal University of Ouro PretoUNSPECIFIED
Date:August 2014
Journal or Publication Title:Aircraft Engineering and Aerospace Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1108/AEAT-04-2013-0070
Page Range:pp. 274-286
Publisher:Emerald Group Publishing Ltd.
Keywords:Structural robustness, Structural reliability, Thin-walled composite structures, Postbuckling
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Degenhardt, Richard
Deposited On:11 Aug 2014 08:19
Last Modified:06 Sep 2019 15:18

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