Numerical analysis of electric conductivity and percolation threshold of graphene-reinforced nanocomposites by finite element method

Xiaoxin Lu (1, 2) , Julien Yvonnet (2) , Fabrice Detrez (2) , Jinbo Bai (1)

1 MSSMat - Laboratoire de mécanique des sols, structures et matériaux
2 MSME - Laboratoire de Modélisation et Simulation Multi Echelle

A nonlinear Finite Element formulation and a numerical methodology to model the nonlocal and nonlinear effects introduced by the tunneling effect conduction model within the polymer matrix bet- ween close graphene sheets is proposed, which could explain the percolation phenomenon and nonlinear electric behavior of graphene-reinforced nanocomposites with polymer matrix. The computed effective conductivity is evaluated over representative volumes containing arbitrary distributed graphene sheets. The effect of applied electric field, barrier height and graphene aspect ratio are analyzed

Mots clés: raphene/polymer nanocomposites; tunnel effect; highly conducting surface model; electric properties

Domaines: Mécanique des structures [physics.class-ph]

Xiaoxin Lu, Julien Yvonnet, Fabrice Detrez, Jinbo Bai. Numerical analysis of electric conductivity and percolation threshold of graphene-reinforced nanocomposites by finite element method. 13e colloque national en calcul des structures, Université Paris-Saclay, May 2017, Giens, Var, France. ⟨hal-01926883⟩