Abstract
Abstract The discrete element method (DEM) simulates large discontinuous deformations as a natural outcome of discrete particle interactions. The method is well suited for problems such as plowing, penetration and hopper flows. However, verification of DEM simulations has been largely limited to comparisons with laboratory stress-strain diagrams of two dimensional simulations of at most a few thousand ideally-shaped particles. This paper presents an automated video tracking and digital image analysis system that has been developed to obtain soil particle displacement fields and velocities from small-scale laboratory experiments. A three-dimensional simulation of a laboratory plowing experiment is performed in which a one-to-one correspondence is achieved between the number of particles and their size distribution in simulation and physical experiment. The data obtained from the video tracking system are used to evaluate the qualitative and quantitative ability of the simulation to model the experiment kinematics.
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