[en] 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.
Disciplines :
Materials science & engineering
Author, co-author :
Shahin, Ghassan
Desrues, Jacques
Dal Pont, Stefano
Argilaga, Albert ; Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Language :
English
Title :
A study of the influence of REV variability in double-scale FEMxDEM analysis
Publication date :
04 August 2016
Journal title :
International Journal for Numerical Methods in Engineering
ISSN :
0029-5981
eISSN :
1097-0207
Publisher :
John Wiley & Sons, Hoboken, United States - New Jersey
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