Effect of sand particle shape on micromechanical modeling in direct shear testing

Simple item page
dc.contributor.authorNecochea, Javier E.
dc.contributor.authorSaez, Esteban
dc.contributor.authorHanley, Kevin J.
dc.date.accessioned2025-01-20T16:19:16Z
dc.date.available2025-01-20T16:19:16Z
dc.date.issued2024
dc.description.abstractSoil representation in discrete element method (DEM) simulations is a complex process due to the intrinsic variability in grain shape. Many methods have been proposed to include shape effects in DEM, from rolling friction to aspherical particle representations such as ellipsoids or polyhedra. In this paper the micromechanical differences between two commonly used methods of shape representation, rolling friction applied to spherical particles and ellipsoids, are investigated for direct shear testing. This simulation study is supported by dry direct shear tests in the laboratory using a poorly graded sand and three vertical confining pressures: 50, 100 and 200 kPa. While the bulk behavior observed in the laboratory can be matched using both shape representation approaches, the micromechanics show significant differences. The average cumulative rotation of the ellipsoidal particles is an order of magnitude lower than for the spheres with rolling friction. The addition of rolling friction significantly affects the mechanical redundancy of the system, making the spherical-particle samples more hyperstatic than their ellipsoidal equivalents. Although using ellipsoids enables a better representation of the micromechanical behavior, this increases the computational cost five-fold compared to using rolling friction and spheres.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.compgeo.2024.106222
dc.identifier.eissn1873-7633
dc.identifier.issn0266-352X
dc.identifier.urihttps://doi.org/10.1016/j.compgeo.2024.106222
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90683
dc.identifier.wosidWOS:001217199300001
dc.language.isoen
dc.revistaComputers and geotechnics
dc.rightsacceso restringido
dc.subjectDiscrete element method (DEM)
dc.subjectEllipsoids
dc.subjectRolling friction
dc.subjectMicromechanics
dc.subjectMechanical redundancy
dc.titleEffect of sand particle shape on micromechanical modeling in direct shear testing
dc.typeartículo
dc.volumen169
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Effect of sand particle shape on micromechanical modeling in direct shear testing.pdf
Size:
2.21 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas