īourrier F, Nicot F, Darve F (2010) Evolution of the micromechanical properties of impacted granular materials. Phys Rev B Condens Matter Mater Phys 60:2391–2403. Int J Numer Methods Eng 62:1442–1462īernstein N, Kaxiras E (1999) Concurrent coupling of length scales: methodology and application. Comptes Rendus l’Academie des Sci Ser IIB Mech Phys Astron 12:899–904īen DH, Rateau G (2005) The Arlequin method as a flexible engineering design tool. īen DH (1998) Multiscale mechanical problems: the Arlequin method.
Géotechnique 64:551–569Īzevedo NM, Lemos JV (2006) Hybrid discrete element/finite element method for fracture analysis. The distribution of tamping energy between the two mechanisms can influence the compaction efficiency, and allocating higher compaction energy to bearing capacity mechanism could improve the efficiency of dynamic compaction.Īrshad MI, Tehrani FS, Prezzi M, Salgado R (2014) Experimental study of cone penetration in silica sand using digital image correlation. Under impact loading, the soil undergoes a transient weakening process induced by dynamic stress propagation, which makes the soil easier to densify under bearing capacity mechanism. The responses of the DEM model show that dynamic stress propagation (compaction mechanism) and tamper penetration (bearing capacity mechanism) play very different roles in soil deformations. The comparison between the numerical and physical test results shows that the coupling method can effectively simulate the dynamic compaction process. The method is validated using a model dynamic compaction test on sand. This paper introduces a three-dimensional discrete element–finite difference coupling method, in which the discrete–continuum interactions are modeled in local coordinate systems where the force and displacement compatibilities between the coupled subdomains are considered. Due to this, the application of DEM to boundary value problems has been limited.
However, its computational efficiency can be greatly compromised when large number of particles are required to model regions of less interest to researchers.
Discrete element method has been widely adopted to simulate processes that are challenging to continuum-based approaches.
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