An interface debonding law subject to viscous regularization for avoiding instability: Application to the delamination problems

Lofti Hamitouche 1 Mostapha Tarfaoui 1 A. Vautrin 2, 3
1 LBMS - Laboratoire brestois de mécanique et des systèmes
2 PECM-ENSMSE - Plasticité, Endommagement et Corrosion des Matériaux
3 MPE-ENSMSE - Département Mécanique et Procédés d'Elaboration
Abstract : The prediction of ply delamination in laminated composites is modeled by using interface elements. The numerical approach is based on the cohesive zone model, which is shown to provide an efficient description of the delamination growth. The theoretical study is performed in quasi-static regime and an implicit finite element scheme is used. A comprehensive I D example shows that cohesive elements may induce numerical instability and that the use of a viscous regularization is relevant to suppress the instability and to obtain a reasonable numerical convergence. This paper describes a technique that can be used to introduce damping into cohesive zone finite element simulations of crack nucleation and growth, with a view to avoiding convergence difficulties in quasi-static finite element simulations. A new kind of viscous regularization is proposed, which applies to the bilinear debonding model and has a limited rate dependency. An experimental study is performed by using DCB (double cantilever beam) samples for the mode I interlaminar fracture toughness test; a good agreement between numerical predictions and experimental results is obtained. (c) 2007 Elsevier Ltd. All rights reserved.
keyword : DAMAGE MODEL COMPOSITES SIMULATION LOCALIZATION PREDICTION MESOMODEL GROWTH
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Article dans une revue
Engineering Fracture Mechanics, Elsevier, 2008, 75 (10), pp.3084-3100. 〈10.1016/j.engfracmech.2007.12.014〉
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https://hal-emse.ccsd.cnrs.fr/emse-00502020
Contributeur : Anna Fraczkiewicz <>
Soumis le : mardi 13 juillet 2010 - 09:59:11
Dernière modification le : mardi 23 octobre 2018 - 14:36:08

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Lofti Hamitouche, Mostapha Tarfaoui, A. Vautrin. An interface debonding law subject to viscous regularization for avoiding instability: Application to the delamination problems. Engineering Fracture Mechanics, Elsevier, 2008, 75 (10), pp.3084-3100. 〈10.1016/j.engfracmech.2007.12.014〉. 〈emse-00502020〉

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