ORBi: Wu Ling - Homogenization of fibre reinforced composite with gradient enhanced damage model

Reference : Homogenization of fibre reinforced composite with gradient enhanced damage model


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering Engineering, computing & technology : Aerospace & aeronautics engineering
	To cite this reference:	http://hdl.handle.net/2268/99050

Title :	Homogenization of fibre reinforced composite with gradient enhanced damage model
Language :	English
Author, co-author :	Wu, Ling [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
	Noels, Ludovic [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 > > > >]
Publication date :	Nov-2011
Main document 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
Pages :	9 pages
On invitation :	No
Audience :	International
ISBN :	978-2-9601143-1-7
Event name :	5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
Event date :	14-17 november 2011
Event organizer :	Université de Liège, Universiteit Gent, Université Catholique de Louvain
Event place (city) :	Liège
Event country :	Belgium
Keywords :	[en] 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.
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.
Permalink :	http://hdl.handle.net/2268/99050
Other URL :	http://www.ltas.ulg.ac.be/acomen2011/NewWebSite/docs/Abstracts/Fracture_of_Composites/Fracture%20of%20Composites04V2.pdf

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