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FEMxDEM: a new efficient multi-scale approach for geotechnical problems with strain localization
Nguyen, Trung Kien; Argilaga, Albert; Caillerie, Denis et al.
2017In EPJ Web of Conferences, 140
Peer reviewed
 

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Keywords :
FEMxDEM; multi-scale; strain localization
Abstract :
[en] The paper presents a multi-scale modeling of Boundary Value Problem (BVP) approach involving cohesive-frictional granular materials in the FEM × DEM multi-scale framework. On the DEM side, a 3D model is defined based on the interactions of spherical particles. This DEM model is built through a numerical homogenization process applied to a Volume Element (VE). It is then paired with a Finite Element code. Using this numerical tool that combines two scales within the same framework, we conducted simulations of biaxial and pressuremeter tests on a cohesive-frictional granular medium. In these cases, it is known that strain localization does occur at the macroscopic level, but since FEMs suffer from severe mesh dependency as soon as shear band starts to develop, the second gradient regularization technique has been used. As a consequence, the objectivity of the computation with respect to mesh dependency is restored.
Disciplines :
Materials science & engineering
Author, co-author :
Nguyen, Trung Kien
Argilaga, Albert ;  Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Caillerie, Denis
Combe, Gael
Dal Pont, Stefano
Desrues, Jacques
Richefeu, Vincent
Language :
English
Title :
FEMxDEM: a new efficient multi-scale approach for geotechnical problems with strain localization
Publication date :
01 June 2017
Event name :
owders and Grains 2017 - 8th International Conference on Micromechanics on Granular Media
Event date :
2017
Audience :
International
Journal title :
EPJ Web of Conferences
ISSN :
2101-6275
eISSN :
2100-014X
Publisher :
EDP Sciences, Les Ulis, France
Volume :
140
Peer reviewed :
Peer reviewed
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since 15 January 2018

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