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A study of the influence of REV variability in double‐scale FEM ×DEM analysis
Author(s) -
Shahin Ghassan,
Desrues Jacques,
Pont Stefano Dal,
Combe Gaël,
Argilaga Albert
Publication year - 2016
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.5202
Subject(s) - microscale chemistry , homogenization (climate) , finite element method , multiscale modeling , discrete element method , granular material , representation (politics) , scale (ratio) , structural engineering , materials science , statistical physics , mechanics , mathematics , composite material , engineering , physics , chemistry , biodiversity , ecology , mathematics education , computational chemistry , politics , political science , law , biology , quantum mechanics
Summary In this work, the consequences of using several different discrete element granular assemblies for the representation of the microscale structure, in the framework of multiscale modeling, have been investigated. The adopted modeling approach couples, through computational homogenization, a macroscale continuum with microscale discrete simulations. Several granular assemblies were used depending on the location in the macroscale finite element mesh. The different assemblies were prepared independently as being representative of the same material, but their geometrical differences imply slight differences in their response to mechanical loading. The role played by the micro‐assemblies, with weaker macroscopic mechanical properties, on the initiation of strain localization in biaxial compression tests is demonstrated and illustrated by numerical modeling of different macroscale configurations. Copyright © 2016 John Wiley & Sons, Ltd.