Modelling realistic shape and particle inertia in DEM / J. Ferellec in Géotechnique, Vol. 60 N° 3 (Mars 2010)  

Public ISBD [article]  inGéotechnique > Vol. 60 N° 3 (Mars 2010) . - pp. 227–232 Titre : Modelling realistic shape and particle inertia in DEM Type de document : texte imprimé Auteurs : J. Ferellec, Auteur ; G. McDowell, Auteur Année de publication : 2011 Article en page(s) : pp. 227–232 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Numerical modelling Friction Dynamics Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : 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. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.t.015 [article] Modelling realistic shape and particle inertia in DEM [texte imprimé] / J. Ferellec, Auteur ; G. McDowell, Auteur . - 2011 . - pp. 227–232. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 60 N° 3 (Mars 2010) . - pp. 227–232 Mots-clés : Numerical modelling Friction Dynamics Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : 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. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.t.015

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