FEM x DEM modelling of cohesive granular materials: numerical homogenization and multi-scale simulations

• Autorzy: Nguyen T. K. , Combe G. , Caillerie D. , Desrues J.

Identyfikatory

DOI

10.2478/s11600-014-0228-3

• Języki publikacji: EN

Abstrakty

EN

The article presents a multi-scale modelling approach of cohesive granular materials, its numerical implementation and its results. At micro-scopic level, Discrete Element Method (DEM) is used to model dense grain spacking. At the macroscopic level, the numerical solution is obtained by a Finite Element Method (FEM). In order to bridge the micro- and macro-scales, the concept of Representative Elementary Volume (REV) is applied, in which the average REV stress and the consistent tangent operators are obtained in each macroscopic integration point as the results of DEM’s simulation. In this way, the numerical constitutive law is determined through the detailed modelling of the microstructure, taking into account the nature of granular materials. We first elaborate the principle of the computation homogenisation (FEMDEM), then demonstrate the features of our multi-scale computation in terms of a biaxial compression test. Macroscopic strain location is observed and discussed.

Słowa kluczowe

EN

multi-scale; FEM; DEM; homogenisation; cohesive granular materials

PL

FEM; DEM; homogenizacja; materiał ziarnisty

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2014
• Tom: Vol. 62, no. 5
• Strony: 1109--1126
• Opis fizyczny: Bibliogr. 31 poz.

Twórcy

autor

Nguyen T. K.

• Université Joseph Fourier, Institut Polytechnique de Grenoble, CNRS UMR5521, 3SR Lab., Grenoble, France

autor

Combe G.

• Université Joseph Fourier, Institut Polytechnique de Grenoble, CNRS UMR5521, 3SR Lab., Grenoble, France

autor

Caillerie D.

• Université Joseph Fourier, Institut Polytechnique de Grenoble, CNRS UMR5521, 3SR Lab., Grenoble, France

autor

Desrues J.

• Université Joseph Fourier, Institut Polytechnique de Grenoble, CNRS UMR5521, 3SR Lab., Grenoble, France

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