[en] In this work, a gradient-enhanced mean-field homogenization (MFH) procedure is proposed for fiber reinforced materials. In this approach, the fibers are assumed to remain linear elastic while the matrix material obeys an elasto-plastic behavior enhanced by a damage model. As classical finite element simulations face the problems of losing uniqueness and strain localization when strain softening of materials is involved, we develop the mean-field homogenization in a non-local way.
Toward this end we use the so-called non-local implicit approach, reformulated in an anisotropic way to describe the damage in the matrix. As a result we have a multi-scale model that can be used to study the damage process at the meso-scale, and in particular the damaging of plies in a composite stack, in an efficient computational way. As a demonstration a stack with a hole is studied and it is shown that the model predicts the damaging process in bands oriented with the fiber directions.
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
Doghri, Issam; Université Catholique de Louvain - UCL > iMMC
Language :
English
Title :
Non-local damage-enhanced MFH for multiscale simulations of composites
Publication date :
2012
Event name :
XII SEM International Conference & Exposition on Experimental and Applied Mechanics
Event organizer :
Society for Experimental Mechanics Inc.
Event place :
Costa Mesa, United States
Event date :
11-14 June 2012
Audience :
International
Main work title :
Proceedings of the XII SEM International Conference & Exposition on Experimental and Applied Mechanics
Pages :
8 p.
European Projects :
FP7 - 235303 - MATERA+ - ERA-NET Plus on Materials Research
Name of the research project :
SIMUCOMP no 1017232 (CT-EUC 2010-10-12)
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