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

Orifici, Adrian and Thomson, R.S. and Degenhardt, Richard and Bisagni, C. and 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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Abstract

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.

Document Type:Conference or Workshop Item (Paper)
Title:Development of a Finite Element Analysis Methodology for the Propagation of Delaminations in Composite Structures
Authors:
AuthorsInstitution or Email of Authors
Orifici, AdrianUNSPECIFIED
Thomson, R.S.UNSPECIFIED
Degenhardt, RichardUNSPECIFIED
Bisagni, C.UNSPECIFIED
Bayandor, J.UNSPECIFIED
Date:May 2006
Keywords:delamination, Virtual Crack Closure Technique, double cantilever beam, propagation modelling.
Event Title:XIV Int. Conference on Mechanics of Composite Materials (MCM)
Event Location:Riga, Lettland
Event Type:international Conference
Event Dates:2006-05-29 - 2006-06-02
HGF - Research field:Aeronautics, Space and Transport
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:06 Nov 2007
Last Modified:12 Dec 2013 20:26

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