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.
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Acknowledgement
The research has been funded by the Walloon Region under the agreement SIMUCOMP n° 1017232 (CT-EUC 2010-10-12) in the context of the ERA-NET +, Matera + framework.
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Wu, L., Noels, L., Adam, L., Doghri, I. (2013). Non-local Damage-Enhanced MFH for Multiscale Simulations of Composites. In: Patterson, E., Backman, D., Cloud, G. (eds) Composite Materials and Joining Technologies for Composites, Volume 7. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4553-1_13
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DOI: https://doi.org/10.1007/978-1-4614-4553-1_13
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