Journal ArticleDOI
Yield and deformation of an assembly of disks subjected to a deviatoric stress loading
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TLDR
In this article, the deformation of an assembly of particles is examined using a discrete element method (DEM) numerical model, where the particles are modeled as random-sized, rough, inelastic, circular two-dimensional disks.About:
This article is published in Mechanics of Materials.The article was published on 1998-04-01. It has received 59 citations till now. The article focuses on the topics: Deformation (mechanics) & Stress (mechanics).read more
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Frictionless bead packs have macroscopic friction, but no dilatancy.
TL;DR: Numerical simulation of homogeneously sheared assemblies of frictionless, nearly rigid beads in the quasistatic limit of vanishing I shows that dissipation at the macroscopic level results from repeated network rearrangements, similar to the effective friction of a frictionless slider on a bumpy surface.
Journal ArticleDOI
Simulation of multi-axial compaction of granular media from loose to high relative densities
TL;DR: In this paper, a multi-particle finite element model (MPFEM) was used to explore the densification yield surfaces of a collection of monosize particles in 2D.
Journal ArticleDOI
Coefficient of restitution and linear–dashpot model revisited
Thomas Schwager,Thorsten Pöschel +1 more
TL;DR: In this article, the authors derived the coefficient of restitution for an isolated pair of colliding particles with the assumption of a linear-dashpot interaction force, which is a common assumption in granular systems.
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Numerical models of the evolution of accretionary wedges and fold-and-thrust belts using the distinct-element method
David Burbidge,Jean Braun +1 more
TL;DR: In this article, a 2D numerical model is used to investigate the evolution of simple accretionary wedges and fold-and-thrust belts with a rigid backstop and base.
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Numerical and experimental investigations of the flow of powder into a confined space
Chuan-Yu Wu,Alan C.F. Cocks +1 more
TL;DR: In this paper, the authors investigated the flow behavior of a powder as it is delivered into a confined space from a moving shoe and developed an experimental system to model the filling process.
References
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Journal ArticleDOI
The stress-dilatancy relation for static equilibrium of an assembly of particles in contact
TL;DR: In this paper, the authors studied the relationship between the rate of dilatancy and the maximum stress ratio for any ideal packing and showed that the Mohr-Coulomb criterion of failure is strictly applicable to a continuum and does not have general application to a discontinuous assembly of particles.
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Viscosity, granular‐temperature, and stress calculations for shearing assemblies of inelastic, frictional disks
Otis R. Walton,Robert L. Braun +1 more
TL;DR: In this article, the effects of two energy loss mechanisms on viscosity, stress, and granular temperature in assemblies of nearly rigid, inelastic frictional disks undergoing steady-state shearing are calculated.
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A numerical investigation of the structure of persistent shear bands in granular media
Jean Pierre Bardet,J. Proubet +1 more
TL;DR: In this article, the structure of persistent shear bands in granular materials is investigated by numerically simulating an idealized assembly of two-dimensional particles with flexible stress-controlled boundaries.
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Observations on stress-force-fabric relationships in idealized granular materials
TL;DR: In this paper, a series of theoretical developments and numerical experiments directed at quantifying important features of the micromechanical behavior of granular media by introducing average characteristics of fabric anisotropy and certain statistical averages of contact forces are presented.