EPJ Web Conf.
Volume 249, 2021Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Published online||07 June 2021|
Mesoscale inertial transition in granular materials
INRAE, Aix Marseille Univ., RECOVER, 3275 Rte Cézanne, CS 40061, 13182 Aix en Provence Cedex5, France
2 INRAE, Grenoble Alpes Univ., ETNA, 2 Rue de la Papeterie BP76, 38402 Saint Martin d’Hères, France
Published online: 7 June 2021
Granular assemblies can experience complex failure patterns along a given loading path, with a distribution of ephemeral inertial events marked by local outbursts in kinetic energy. However, investigating such mechanisms appears to be necessary to understand how a certain failure mode develops in a granular material. Using a discrete element method, this study highlights several microstructure reorganizations before the specimen reaches a proper failure state. Meso structures have proven to be efficient to understand the elementary mechanisms responsible for these outbursts in kinetic energy. Strain–like and stress-like quantities are thus defined at a mesoscale and they are used to characterize the nucleation and propagation of these local microstructural events.
A video is available at https://doi.org/10.48448/sfj6-z397
© The Authors, published by EDP Sciences, 2021
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