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Composite Materials and Joining Technologies for Composites, Volume 7

Part of the series Conference Proceedings of the Society for Experimental Mechanics Series pp 115-121

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Non-local Damage-Enhanced MFH for Multiscale Simulations of Composites

  • Ling WuAffiliated withUniversity of Liege, LTAS-CM3Northwestern Polytechnical University, School of Aeronautics Email author 
  • , Ludovic NoelsAffiliated withUniversity of Liege, LTAS-CM3
  • , Laurent AdamAffiliated withe-Xstream Engineering
  • , Issam DoghriAffiliated withe-Xstream EngineeringUniversité Catholique de Louvain

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Abstract

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 fibers directions.

Keywords

Mean-field homogenization Non-local Composites Damage Anisotropy