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Development of a Finite Element Analysis Methodology for the Propagation of Delaminations in Composite Structures

Orifici, Adrian und Thomson, R.S. und Degenhardt, Richard und Bisagni, C. und Bayandor, J. (2006) Development of a Finite Element Analysis Methodology for the Propagation of Delaminations in Composite Structures. XIV Int. Conference on Mechanics of Composite Materials (MCM), 2006-05-29 - 2006-06-02, Riga, Lettland.

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Kurzfassung

Analysing the collapse of skin-stiffened structures requires capturing the critical phenomenon of skin-stiffener separation, which can be considered analogous to interlaminar cracking. This paper presents the development of a numerical approach for simulating the propagation of interlaminar cracks in composite structures. A degradation methodology was applied in MSC.Marc that involved modelling the structure with shell layers connected by user-defined multiple point constraints (MPCs). User subroutines were written that apply the Virtual Crack Closure Technique (VCCT) to determine the onset of crack growth, and modify the properties of the user-defined MPCs to simulate crack propagation. Methodologies for the release of failing MPCs are presented and are discussed with reference to the VCCT assumption of self-similar crack growth. Numerical results applying the release methodologies are then compared with experimental results for a double cantilever beam specimen. Based on this comparison, recommendations for the future development of the degradation model are made, especially with reference to developing an approach for the collapse analysis of fuselage-representative structures.

Dokumentart:Konferenzbeitrag (Paper)
Titel:Development of a Finite Element Analysis Methodology for the Propagation of Delaminations in Composite Structures
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Orifici, AdrianNICHT SPEZIFIZIERT
Thomson, R.S.NICHT SPEZIFIZIERT
Degenhardt, RichardNICHT SPEZIFIZIERT
Bisagni, C.NICHT SPEZIFIZIERT
Bayandor, J.NICHT SPEZIFIZIERT
Datum:Mai 2006
Stichwörter:delamination, Virtual Crack Closure Technique, double cantilever beam, propagation modelling.
Veranstaltungstitel:XIV Int. Conference on Mechanics of Composite Materials (MCM)
Veranstaltungsort:Riga, Lettland
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-05-29 - 2006-06-02
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:06 Nov 2007
Letzte Änderung:12 Dez 2013 20:26

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