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Titre :
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Modelling realistic shape and particle inertia in DEM (2011)
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Auteurs :
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J. Ferellec, Auteur ;
G. McDowell, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Géotechnique (Vol. 60 N° 3, Mars 2010)
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Article en page(s) :
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pp. 227–232
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Note générale :
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Génie Civil
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Langues :
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Anglais
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Index. décimale :
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624 (Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes)
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Tags :
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Numerical modelling Friction Dynamics
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Résumé :
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The use of clumps of overlapping spheres in DEM can be used to represent realistic particle shapes. This Technical Note discusses a method that is simple and fast, and highlights the key parameters influencing particle resolution. However, the problem with overlapping mass is that the density is non-uniform, which leads to incorrect moments of inertia and therefore rotational resistance. This Technical Note addresses this issue, and proposes a simple method to reduce the error in the principal moments of inertia. The effect on a falling heap of ballast particles is shown; the method improves not only behaviour, but also computational time.
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DEWEY :
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624.15
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ISSN :
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0016-8505
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En ligne :
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http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.t.015
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