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- Title
A data-driven computational homogenization method based on neural networks for the nonlinear anisotropic electrical response of graphene/polymer nanocomposites.
- Authors
Lu, Xiaoxin; Giovanis, Dimitris G.; Yvonnet, Julien; Papadopoulos, Vissarion; Detrez, Fabrice; Bai, Jinbo
- Abstract
In this paper, a data-driven-based computational homogenization method based on neural networks is proposed to describe the nonlinear electric conduction in random graphene-polymer nanocomposites. In the proposed technique, the nonlinear effective electric constitutive law is provided by a neural network surrogate model constructed through a learning phase on a set of RVE nonlinear computations. In contrast to multilevel (FE 2 ) methods where each integration point is associated with a full nonlinear RVE calculation, the nonlinear macroscopic electric field-electric flux relationship is efficiently evaluated by the surrogate neural network model, reducing drastically (by several order of magnitudes) the computational times in multilevel calculations. Several examples are presented, where the RVE contains aligned graphene sheets embedded in a polymer matrix. The nonlinear behavior is due to the modeling of the tunelling effect at the scale of graphene sheets.
- Subjects
POLYMERIC nanocomposites; ARTIFICIAL neural networks; ELECTRIC conductivity; ELECTRIC flux
- Publication
Computational Mechanics, 2019, Vol 64, Issue 2, p307
- ISSN
0178-7675
- Publication type
Article
- DOI
10.1007/s00466-018-1643-0