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Modelling Strategies for Predicting the Residual Strength of Impacted Composite Aircraft Fuselages

Lachaud, Frédéric and Espinosa, Christine and Michel, Laurent and Rahme, Pierre and Piquet, Robert Modelling Strategies for Predicting the Residual Strength of Impacted Composite Aircraft Fuselages. (2015) Applied Composite Materials, 22 (6). 599-621. ISSN 0929-189X

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Official URL: https://doi.org/10.1007/s10443-014-9427-y

Abstract

Aeronautic Certification rules established for the metallic materials are not convenient for the composite structures concerning the resistance against impact. The computerbased design is a new methodology that is thought about to replace the experimental tests. It becomes necessary for numerical methods to be robust and predictive for impact. Three questions are addressed in this study: (i) can a numerical model be “mechanically intrinsic” to predict damage after impact, (ii) can this model be the same for a lab sample and a large structure, and (iii) can the numerical model be predictive enough to predict the Compression After Impact (CAI)? Three different computational strategies are used and compared: a Cohesive Model (CM), a Continuous Damage Model (CDM) coupling failure modes and damage, and a Mixed Methodology (MM) using the CDM for delamination initiation and the CM for cracks propagation. The first attempts to use the Smooth Particle Hydrodynamics method are presented. Finally, impact on a fuselage is modelled and a numerical two-stage strategy is developed to predict the CAI.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Lebanese University - LU (LEBANON)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Laurent MICHEL
Deposited On:24 Jun 2019 12:04

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