Reference : Homogenization of fibre reinforced composite with gradient enhanced damage model
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Aerospace & aeronautics engineering
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/99050
Homogenization of fibre reinforced composite with gradient enhanced damage model
English
Wu, Ling mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Noels, Ludovic mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
Adam, Laurent [e-Xstream Engineering > > > >]
Doghri, Issam [e-Xstream Engineering > > > >]
Nov-2011
Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
Hogge, Michel
Van Keer, Roger
Dick, Erik
Malengier, Benny
Slodicka, Marian
Béchet, Eric
Geuzaine, Christophe
Noels, Ludovic
Remacle, Jean-François
9 pages
No
No
International
978-2-9601143-1-7
5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
14-17 november 2011
Université de Liège, Universiteit Gent, Université Catholique de Louvain
Liège
Belgium
[en] Composite ; Homogenization ; Damage
[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.
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.
http://hdl.handle.net/2268/99050
http://www.ltas.ulg.ac.be/acomen2011/NewWebSite/docs/Abstracts/Fracture_of_Composites/Fracture%20of%20Composites04V2.pdf

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