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Development of a finite element methodology for the propagation of delaminations in composite structures

Orifici, Adrian and Thomson, R.S. and Degenhardt, Richard and Bisagni, C. and Bayandor, J. (2007) Development of a finite element methodology for the propagation of delaminations in composite structures. Mechanics of Composite Materials, 43 (1), pp. 9-28. Springer New York. DOI: 10.1007/s11029-007-0001-7. ISSN 0191-5665 (Print) 1573-8922 (Online).

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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 introduced in MSC.Marc, which involved the modelling of a structure with shell layers connected by user-defined multiple-point constraints (MPCs). User subroutines were written that employ 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. The numerical results obtained by using the release methodologies are then compared with experimental data 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:Article
Title:Development of a finite element methodology for the propagation of delaminations in composite structures
Authors:
AuthorsInstitution or Email of Authors
Orifici, AdrianSchool of Aerospace, Mechanical & Manufacturing Engineering, Royal Melbourne Institute of Technology,
Thomson, R.S.Cooperative Research Centre for Advanced Composite Structures Ltd
Degenhardt, RichardUNSPECIFIED
Bisagni, C.Dipartimento di Ingegneria Aerospaziale, Politecnico di Milano
Bayandor, J.The Sir Lawrence Wackett Aerospace Centre, Royal Melbourne Institute of Technology
Date:January 2007
Journal or Publication Title:Mechanics of Composite Materials
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:43
DOI:10.1007/s11029-007-0001-7
Page Range:pp. 9-28
Publisher:Springer New York
ISSN:0191-5665 (Print) 1573-8922 (Online)
Status:Published
Keywords:delamination, virtual crack closure technique, double cantilever beam, propagation modelling
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:11 Sep 2008
Last Modified:27 Apr 2009 14:09

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