Journal
COMPUTERS AND GEOTECHNICS
Volume 85, Issue -, Pages 220-229Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2016.12.034
Keywords
Discrete element method; Bounded rolling friction model; Rolling resistance torque; Railway ballast; Railway track stability
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Funding
- Spanish MINECO [BIA2012-39172, BIA2015-67263-R]
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The Discrete Element Method (DEM) was found to be an effective numerical method for the calculation of engineering problems involving granular materials. However, the representation of irregular particles using the DEM is a very challenging issue, leading to different geometrical approaches. This document presents a new insight in the application of one of those simplifications known as rolling friction, which avoids excessive rotation when irregular shaped materials are simulated as spheric particles. This new approach, called the Bounded Rolling Friction model, was applied to reproduce a ballast resistance test. (C) 2017 Elsevier Ltd. All rights reserved.
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