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Development of a Degradation Model for the Collapse Analysis of Composite Aerospace Structures

Orifici, Adrian C. und Thomson, Rodney S. und Degenhardt, Richard und Bisagni, Chiara und Bayandor, Javid (2006) Development of a Degradation Model for the Collapse Analysis of Composite Aerospace Structures. III European Conference on Computational Mechanics, 2006-06-04 - 2006-06-08, Lissabon, Portugal.

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Kurzfassung

For stiffened structures in compression the most critical damage mechanism leading to structural collapse is delamination or adhesive disbonding between the skin and stiffener. This paper presents the development of a numerical approach capable of simulating interlaminar crack growth in composite structures as a representation of this damage mecha-nism. A degradation methodology was proposed using shell layers connected at the nodes by user-defined multiple point constraints (MPCs), and then controlling the properties of these MPCs to simulate the initiation and propagation of delamination and disbonding. A fracture mechanics approach based on the Virtual Crack Closure Technique (VCCT) is used to detect growth at the delamination front. Numerical predictions using the degradation methodology were compared to experimental results for double cantilever beam (DCB) specimens to dem-onstrate the effectiveness of the current approach. Future development will focus on address-ing the apparent conservatism of the VCCT approach, and extending the application of the method to other specimen types and stiffened structures representative of composite fuselage designs. This work is part of the European Commission Project COCOMAT (Improved MA-Terial Exploitation at Safe Design of COmposite Airframe Structures by Accurate Simulation of COllapse), an ongoing four-year project that aims to exploit the large strength reserves of composite aerospace structures through more accurate prediction of collapse.

Dokumentart:Konferenzbeitrag (Paper)
Titel:Development of a Degradation Model for the Collapse Analysis of Composite Aerospace Structures
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Orifici, Adrian C.Royal Melbourne Institute of Technology
Thomson, Rodney S.Cooperative Research Centre for Advanced Composite Structures Limited
Degenhardt, RichardNICHT SPEZIFIZIERT
Bisagni, ChiaraPolitecnico di Milano
Bayandor, JavidRoyal Melbourne Institute of Technology
Datum:2006
Stichwörter:Composite, skin-stiffener separation, VCCT element, DCB, COCOMAT
Veranstaltungstitel:III European Conference on Computational Mechanics
Veranstaltungsort:Lissabon, Portugal
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-06-04 - 2006-06-08
Veranstalter :Associação Portuguesa de Mecânica Teórica, Aplicada e Computacional
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen & Werkstoffe
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Strukturmechanik
Hinterlegt von: Doris Ries
Hinterlegt am:12 Nov 2007
Letzte Änderung:12 Dez 2013 20:23

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