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On the validation of DEM and FEM/DEM models in 2D and 3D

On the validation of DEM and FEM/DEM models in 2D and 3D Purpose – As particulate systems evolve, sliding, rolling and collision contacts all produce forces that discrete element method (DEM) methods aim to predict. Verification of friction rarely takes high priority in validation studies even though friction plays a very important role in applications and in mathematical models for numerical simulation. The purpose of this paper is to address sliding friction in finite element method (FEM)/DEM and rolling friction in DEM. Design/methodology/approach – Analytical solutions for “block sliding” were used to verify the authors' tangential contact force implementation of 2D FEM/DEM. Inspired by the kinetic art work Liquid Reflections by Liliane Lijn, which consists of free balls responding within a rotating shallow dish, DEM was used to simulate rolling, sliding and state‐of‐rest of spherical particles relative to horizontal and inclined, concave and flat spinning platforms. Various material properties, initial and boundary conditions are set which produce different trajectory regimes. Findings – Simulation output is found to be in excellent agreement when compared with experimental results and analytical solutions. Originality/value – The more widespread use of analytically solvable benchmark tests for DEM and FEM/DEM codes is recommended. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Engineering Computations Emerald Publishing

On the validation of DEM and FEM/DEM models in 2D and 3D

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Publisher
Emerald Publishing
Copyright
Copyright © 2009 Emerald Group Publishing Limited. All rights reserved.
ISSN
0264-4401
DOI
10.1108/02644400910975469
Publisher site
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Abstract

Purpose – As particulate systems evolve, sliding, rolling and collision contacts all produce forces that discrete element method (DEM) methods aim to predict. Verification of friction rarely takes high priority in validation studies even though friction plays a very important role in applications and in mathematical models for numerical simulation. The purpose of this paper is to address sliding friction in finite element method (FEM)/DEM and rolling friction in DEM. Design/methodology/approach – Analytical solutions for “block sliding” were used to verify the authors' tangential contact force implementation of 2D FEM/DEM. Inspired by the kinetic art work Liquid Reflections by Liliane Lijn, which consists of free balls responding within a rotating shallow dish, DEM was used to simulate rolling, sliding and state‐of‐rest of spherical particles relative to horizontal and inclined, concave and flat spinning platforms. Various material properties, initial and boundary conditions are set which produce different trajectory regimes. Findings – Simulation output is found to be in excellent agreement when compared with experimental results and analytical solutions. Originality/value – The more widespread use of analytically solvable benchmark tests for DEM and FEM/DEM codes is recommended.

Journal

Engineering Computations – Emerald Publishing

Published: Aug 21, 2009

Keywords: Finite element analysis; Friction

References

  • Validation tests on a distinct element model of vibrating cohesive particle systems
    Asmar, B.N.; Langston, P.A.; Matchett, A.J.; Walters, J.K.