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A robust design strategy for thin-walled composite structures under compression load based on the assessment of the structural energy

da Cunha, Fabio and Sinapius, Michael and Degenhardt, Richard and Wille, Tobias and Araujo, Franciso Celio (2012) A robust design strategy for thin-walled composite structures under compression load based on the assessment of the structural energy. 7th Int. Conf. Supply on the Wings, 6.-8.11.2012, Frankfurt, Germany.

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Abstract

It is presented in this paper a robust design criterion to evaluate thin-walled composite structures under compressive loading based on the assessment of the structural energy until the ultimate loading. This robust design criterion accounts for the reliability of the structure in terms of the ultimate load, and at the same time its reliability in terms of the structural energy. In order to perform the structural energy assessment, it is calculated the area under the load-shortening curve between several characteristics points of the curve such as local buckling, global buckling, onset of degradation, maximum and collapse load. In this context, a finite element solver with geometrical nonlinearity is used, in which the ply properties are selectively degraded by ply progressive failure technique. The methodology is presented and demonstrated with a case study of an unstiffened composite plate under compressive loading in two steps: the first step comprises of a deterministic design of experiments, in which candidate designs are selected based on a load requirement, and the second step comprises of a nondeterministic evaluation of those candidate designs. Concluding, it is demonstrated that a design criterion that takes into account both simultaneously the reliability in terms of the ultimate load and the energy reserves could be advantageous.

Item URL in elib:https://elib.dlr.de/83839/
Document Type:Conference or Workshop Item (Speech)
Title:A robust design strategy for thin-walled composite structures under compression load based on the assessment of the structural energy
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
da Cunha, FabioUNSPECIFIEDUNSPECIFIED
Sinapius, MichaelUNSPECIFIEDUNSPECIFIED
Degenhardt, RichardUNSPECIFIEDUNSPECIFIED
Wille, TobiasUNSPECIFIEDUNSPECIFIED
Araujo, Franciso Celio1Dept Civil Eng, UFOP, Ouro Preto, MG, BrazilUNSPECIFIED
Date:2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:robust design criterion, thin-walled composite structures, energy reserve
Event Title:7th Int. Conf. Supply on the Wings
Event Location:Frankfurt, Germany
Event Type:international Conference
Event Dates:6.-8.11.2012
Organizer:AIRTEC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old), L - Structures & Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Degenhardt, Richard
Deposited On:10 Dec 2013 18:59
Last Modified:08 May 2014 23:24

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