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Homogenization of fibre reinforced composite with gradient enhanced damage model
Wu, Ling; Noels, Ludovic; Adam, Laurent et al.
2011In Hogge, Michel; Van Keer, Roger; Dick, Erik et al. (Eds.) Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
 

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Keywords :
Composite; Homogenization; Damage
Abstract :
[en] Classical finite element simulations face the problems of losing uniqueness and strain localization when the strain softening of materials is involved. Thus, when using continuum damage model or plasticity softening model, numerical convergence will not be obtained with the refinement of the finite element discretization when strain localization occurs. Gradient-enhanced softening and non-local continua models have been proposed by several researchers in order to solve this problem. In such approaches, high-order spatial gradients of state variables are incorporated in the macroscopic constitutive equations. However, when dealing with complex heterogeneous materials, a direct simulation of the macroscopic structures is unreachable, motivating the development of non-local homogenization schemes. In this work, a non-local homogenization procedure is proposed for fiber reinforced materials. In this approach, the fiber is assumed to remain linear elastic while the matrix material is modeled as elasto-plastic coupled with a damage law described by a non-local constitutive model. Toward this end, the mean-field homogenization is based on the knowledge of the macroscopic deformation tensors, internal variables and their gradients, which are applied to a micro- structural representative volume element (RVE). Macro-stress is then obtained from a homogenization process.
Disciplines :
Aerospace & aeronautics engineering
Materials science & engineering
Author, co-author :
Wu, Ling ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Noels, Ludovic  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Adam, Laurent;  e-Xstream Engineering
Doghri, Issam;  e-Xstream Engineering
Language :
English
Title :
Homogenization of fibre reinforced composite with gradient enhanced damage model
Publication date :
November 2011
Event name :
5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
Event organizer :
Université de Liège, Universiteit Gent, Université Catholique de Louvain
Event place :
Liège, Belgium
Event date :
14-17 november 2011
Audience :
International
Main work title :
Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
Editor :
Hogge, Michel
Van Keer, Roger
Dick, Erik
Malengier, Benny
Slodicka, Marian
Béchet, Eric
Geuzaine, Christophe
Noels, Ludovic
Remacle, Jean-François
ISBN/EAN :
978-2-9601143-1-7
Pages :
9 p.
European Projects :
FP7 - 235303 - MATERA+ - ERA-NET Plus on Materials Research
Funders :
The research has been funded by the Walloon Region under the agreement SIMUCOMP no 1017232 (CT-EUC 2010-10- 12) in the context of the ERA-NET +, Matera + framework.
CE - Commission Européenne [BE]
Available on ORBi :
since 21 September 2011

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