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Restoring Mesh Independency in FEM-DEM Multi-scale Modelling of Strain Localization Using Second Gradient Regularization
Desrues, Jacques; Argilaga, Albert; Dal Pont, Stefano et al.
2017In Papamichos, Euripides; Papanastasiou, Panos; Pasternak, Elena et al. (Eds.) Bifurcation and Degradation of Geomaterials with Engineering Applications
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Keywords :
FEMxDEM; Second gradient; regularization; double scale
Abstract :
[en] Continuum media from classical mechanics cannot appropriately reproduce the evolution of materials exhibiting strong heterogeneities in the strain field, e.g. strain localization. Models without a microscale representation cannot properly reproduce the microscale mechanisms that trigger the strain localization, in addition, first gradient relations don’t present any length parameter in the formulation. This results in a model without a characteristic length that cannot exhibit any objective band width. In this paper, techniques to introduce an internal length will be enumerated. Microstuctured materials will be retained and in particular Second Gradient model will be exposed and used along with a FEMxDEM approach. Numerical results showing the abilities of the enriched model will conclude the text.
Disciplines :
Materials science & engineering
Author, co-author :
Desrues, Jacques
Argilaga, Albert ;  Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Dal Pont, Stefano
Combe, Gael
Caillerie, Denis
Nguyen, Trung Kien
Language :
English
Title :
Restoring Mesh Independency in FEM-DEM Multi-scale Modelling of Strain Localization Using Second Gradient Regularization
Publication date :
22 April 2017
Event name :
IWBDG 2017: Bifurcation and Degradation of Geomaterials with Engineering Applications
Event date :
2017
By request :
Yes
Audience :
International
Main work title :
Bifurcation and Degradation of Geomaterials with Engineering Applications
Author, co-author :
Papamichos, Euripides
Papanastasiou, Panos
Pasternak, Elena
Dyskin, Arcady
Publisher :
Springer
Pages :
453-457
Peer reviewed :
Peer reviewed
Available on ORBi :
since 15 January 2018

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