Title: Modeling contact interactions between triangulated rounded bodies for the discrete element method
Authors: Smeets, Bart ×
Odenthal, Tim
Keresztes, Janos
Vanmaercke, Simon
Van Liedekerke, Paul
Tijskens, Engelbert
Saeys, Wouter #
Van Oosterwyck, Hans
Ramon, Herman #
Issue Date: 1-Aug-2014
Publisher: North-Holland Pub. Co.
Series Title: Computer Methods in Applied Mechanics and Engineering vol:277 pages:219-238
Abstract: Calculating contact forces between complex shapes for performing Discrete Element Method (DEM) simulations is a long standing problem with no unique ideal solution. In this work, a new method to calculate interactions between arbitrary rounded bodies is presented. Each body is represented by a triangulated surface mesh, in which each triangle is associated with a unique radius of curvature. Then, normal contact forces are calculated by numerically integrating a (Hertz) contact pressure formulation over the contact area between two contacting particles. This results in a mechanistic contact description that is converging with refinement of a given triangulation and directly uses physical material properties as parameters of the contact model. After showing convergence upon mesh refinement towards the Hertzian solution, the error for non-spherical curvatures is investigated and the new model is compared with an indentation experiment of a pear-shaped object. Finally, the method is demonstrated in a simulation of gravitational packing by simulating packing of spheres, pear-shaped as well as gummy bear-shaped objects.
ISSN: 0045-7825
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Mechanical Engineering - miscellaneous
Biomechanics Section
Division of Mechatronics, Biostatistics and Sensors (MeBioS)
× corresponding author
# (joint) last author

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