%0 Conference Proceedings
%T Bulk modulus of soft particle assemblies under compression
%+ École Polytechnique de Montréal (EPM)
%+ Mécanique Théorique, Interface, Changements d’Echelles (MéTICE)
%+ Chiang Mai University (CMU)
%+ Institut universitaire de France (IUF)
%A Cantor, David
%A Cárdenas-Barrantes, Manuel
%A Preechawuttipong, Itthichai
%A Renouf, Mathieu
%A Azéma, Emilien
%< avec comité de lecture
%( Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
%B Powders & Grains
%C Buenos Aires (virtual), Argentina
%3 EPJ Web of Conferences
%8 2021-07-05
%D 2021
%R 10.1051/epjconf/202124914014
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]Conference papers
%X Using a numerical approach based on the coupling of the discrete and finite element methods, we explore the variation of the bulk modulus K of soft particle assemblies undergoing isotropic compression. As the assemblies densify under pressure-controlled boundary conditions, we show that the non-linearities of K rapidly deviate from predictions standing on a small-strain framework or the, so-called, Equivalent Medium Theory (EMT). Using the granular stress tensor and extracting the bulk properties of single representative grains under compression, we propose a model to predict the evolution of K as a function of the sample's solid fraction and a reference state as the applied pressure P ! 0. The model closely reproduces the trends observed in our numerical experiments confirming the behavior scalability of soft particle assemblies from the individual particle scale. Finally, we present the e↵ect of the interparticle friction on K's evolution and how our model easily adapts to such a mechanical constraint.
%G English
%2 https://hal.science/hal-03259722/document
%2 https://hal.science/hal-03259722/file/Conf_Azema_al_EPJ_2021_2.pdf
%L hal-03259722
%U https://hal.science/hal-03259722
%~ CNRS
%~ LMGC
%~ MIPS
%~ UNIV-MONTPELLIER
%~ TEST-HALCNRS
%~ UM-2015-2021