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An analysis methodology for failure in postbuckling skin-stiffener interfaces

Orifici, Adrian and Thomson, R.S. and Herszberg, I. and Weller, T. and Degenhardt, Richard and Bayandor, J. (2007) An analysis methodology for failure in postbuckling skin-stiffener interfaces. Composite Structures, 86, pp. 186-193. Elsevier Ltd.. DOI: doi:10.1016/j.compstruct.2008.03.023. ISSN 0263-8223.

Full text not available from this repository.

Abstract

Blade-stiffened structures have the potential to produce highly efficient structures, particularly when the large strength reserves available after structural buckling, in the postbuckling range, are exploited. In experimental tests of postbuckling stiffened structures made from fibre-reinforced composites, failure typically initiates at the interface of the skin and stiffener and leads to rapid and even explosive failure. A methodology has been developed for analysing collapse in postbuckling composite structures that involves predicting the initiation of interlaminar damage in the skin–stiffener interface. A strength-based criterion is monitored in each ply using a local model of the skin–stiffener interface cross-section. For the analysis of large structures, a global analysis is first run to obtain the complete postbuckling deformation field, which is then input onto a local model using a global–local analysis technique. The coordinates of the local model can easily be moved to rapidly assess failure initiation at numerous skin–stiffener interface locations throughout the global structure. The analysis methodology is compared to experimental results for two-dimensional T-section specimens and large, fuselage-representative stiffened panels and is shown to give accurate predictions of the failure load and failure mechanisms. The use of the approach for the analysis of postbuckling composite structures has application for the design and certification of the next generation of aircraft.

Document Type:Article
Title:An analysis methodology for failure in postbuckling skin-stiffener interfaces
Authors:
AuthorsInstitution or Email of Authors
Orifici, AdrianSchool of Aerospace, Mechanical and Manufacturing Engineering, Royal Melbourne Institute of Technology
Thomson, R.S.Cooperative Research Centre for Advanced Composite Structures Limited
Herszberg, I.Cooperative Research Centre for Advanced Composite Structures Limited
Weller, T.Faculty of Aerospace Engineering, Israel Institute of Technology (Technion)
Degenhardt, RichardUNSPECIFIED
Bayandor, J.The Sir Lawrence Wackett Aerospace Centre, School of Aerospace, Mechanical and Manufacturing Engineering, Royal Melbourne Institute of Technology
Date:2007
Journal or Publication Title:Composite Structures
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:86
DOI:doi:10.1016/j.compstruct.2008.03.023
Page Range:pp. 186-193
Editors:
EditorsEmail
Marshall, I.H.UNSPECIFIED
Publisher:Elsevier Ltd.
ISSN:0263-8223
Status:Published
Keywords:Buckling; Postbuckling; Stiffened panels; Skin–stiffener damage; COCOMAT
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Doris Ries
Deposited On:02 Feb 2009
Last Modified:15 Jan 2010 00:00

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