Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Motion of a solid body within a granular medium
Submission Author:
Douglas Daniel de Carvalho , SP
Co-Authors:
Douglas Daniel de Carvalho, Nicolao Lima, Erick de Moraes Franklin
Presenter: Douglas Daniel de Carvalho
doi://10.26678/ABCM.COBEM2021.COB2021-1280
Abstract
This work consists of numerical simulations of a cylindrical intruder (disk) pulled at a constant speed in a two-dimensional assembly of smaller bidisperse disks in a rectangular confining cell, so that the intruder and the grains have relative displacements. The simulations were carried out with the Discrete Element Method (DEM) using the open source software LIGGGHTS. Different physical configurations are analyzed by varying some important physical parameters of the problem, such as the speed at which the intruder is pulled. We present quantitative measurements of the force experienced by the intruder in different physical configurations, as well as an analysis of the evolution of contact and force networks (associated with the stress distribution). In addition, parameters associated with force anisotropy are also measured, such as the mean contact number and contact anisotropy. We noticed strong fluctuations in the intruder’s force signal that are clearly associated with the dynamics of the force chains within the grains, which proved to be isotropic.
Keywords
Intruder, Granular media, Force networks, anisotropy, DEM simulations
