TY - EJOU
AU - Liang, Shaomin
AU - Liu, Lu
AU - Ji, Shunying
TI - DEM Simulations of Resistance of Particle to Intruders during Quasistatic Penetrations
T2 - Computer Modeling in Engineering \& Sciences
PY - 2021
VL - 128
IS - 1
SN - 1526-1506
AB - Based on the discrete element method and hydrostatics theory, an improved Archimedes principle is proposed to
study the rules pertaining to resistance changes during the penetration process of an intruder into the particulate
materials. The results illustrate the fact that the lateral contribution to the resistance is very small, while the
tangential force of the lateral resistance originates from friction effects. Conversely, the resistance of particulate
materials on the intruder mainly occurs at the bottom part of the intruding object. Correspondingly, the factors that
determine the resistance of the bottom part of the intruding object and the rules pertaining to resistance changes
are analyzed. It is found that when the volume density and friction coefficient of the particles and the radius of the
bottom surface of the cylindrical intruder are varied, the resistance–depth curve consists of a nonlinear segment
and a linear region. The intersection of the two stages occurs at the same location *h/ ˜R* = 0.15 ± 0.055. The slope
of the linear stage is determined by the friction coefficient of the particles. Accordingly, the relationship between
the slope and the friction coefficient is quantified. Finally, it is shown that the slope is independent of the geometry
of the intruder.
KW - Particulate materials; improved Archimedes principle; quasistatic resistance; discrete element method
DO - 10.32604/cmes.2021.016403