Three-Dimensional Discrete Element Method of Analysis of Clays

Yao, Minli; Anandarajah, A.

doi:10.1061/(asce)0733-9399(2003)129:6(585)

Cited by 96 publications

(52 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The normal and tangential stiffnesses, k n and k t respectively, are set to 1.5 × 10 −3 N/μm. Note that the particle size, density, and stiffness are typical of fine grained soils [2][3][4][5][6]. As recommended in Ref.…”

Section: Sample Construction and Shear Testmentioning

confidence: 99%

“…[15,16]. The friction coefficient is set to μ = 0.58 tan (30 • ), which is close to that of kaolinite clay [2][3][4][5][6].…”

Section: Sample Construction and Shear Testmentioning

confidence: 99%

“…These interactions cannot be prescribed as contact laws, but require an integration procedure over the particle surfaces, which can be extremely time consuming in simulations with a large number of particles. These technical problems explain why DEM simulations of fine soils are so scarce [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quasistatic rheology and microstructural description of sheared granular materials composed of platy particles

et al. 2013

View full text Add to dashboard Cite

This is the first paper of a series devoted to the micro-mechanical modeling of clayey soils, by means of discrete element simulations. We specifically focus here on the effect of the platy shape of particles by reducing the interactions between particles to mechanical contact forces (i.e., neither electrostatic repulsion nor van der Waals forces are taken into account). The particles are three-dimensional square plates, approximated as spheropolyhedra. Several samples composed of particles of different levels of platyness (related to the ratio of length to thickness) were numerically prepared and sheared up to large deformations. We analyzed the shear strength, packing fraction, orientation of the particles, connectivity, fabric of the interactions network, and interaction forces as functions of the platyness. We find that both the mechanical behavior and microstructure are strongly dependent on the degree of platyness. The principal underlying phenomenon is the alignment of particle faces along a particular direction. This ordering phenomenon, which emerges even for shapes that deviate only slightly from that of a sphere, enhances the ability of the packing to develop an anisotropic structure leading to large shear strength, especially as a consequence of the fabric and mobilization of friction forces. Moreover, the connectivity of the packings and their packing fraction also evolve with the platyness. In particular, the packing fraction evolves in a nonmonotonic fashion, as observed in other granular materials composed of elongated or angular particles.

show abstract

Section: Sample Construction and Shear Testmentioning

confidence: 99%

“…[15,16]. The friction coefficient is set to μ = 0.58 tan (30 • ), which is close to that of kaolinite clay [2][3][4][5][6].…”

Section: Sample Construction and Shear Testmentioning

confidence: 99%

See 1 more Smart Citation

Quasistatic rheology and microstructural description of sheared granular materials composed of platy particles

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The Discrete Element Method (DEM), first proposed by Cundall and Strack ( [1]) is a numerical technique that can be successfully used in order to simulate those aspects of soil behaviour that cannot be anticipated at the scale of the sample, although derivable from the particle scale. Two of the many issues that need to be addressed in the application of the DEM for clayey geomaterials are ( [2]): a) physico-chemical microscopic interactions between particles have to be taken into account as well as conventional mechanical interactions and b) the platelike (3D) or rod-like (2D) shape of clay particles plays a key role in the interpretation of soil macroscopic behaviour and cannot be ignored during the analysis.…”

Section: Introductionmentioning

confidence: 99%

Micromechanics of non-active clays in saturated state and DEM modelling

et al. 2017

View full text Add to dashboard Cite

Abstract. The paper presents a conceptual micromechanical model for 1-D compression behaviour of nonactive clays in saturated state. An experimental investigation was carried out on kaolin clay samples saturated with fluids of different pH and dielectric permittivity. The effect of pore fluid characteristics on one-dimensional compressibility behaviour of kaolin was investigated. A three dimensional Discrete Element Method (DEM) was implemented in order to simulate the response of saturated kaolin observed during the experiments. A complex contact model was introduced, considering both the mechanical and physico-chemical microscopic interactions between clay particles. A simple analysis with spherical particles only was performed as a preliminary step in the DEM study in the elastic regime.

show abstract

“…Such particles occur, for example, in clayey soils, where the local ordering is generally attributed to the cohesive interactions between particles [32][33][34]. In this paper, we are interested in the texture and local order in numerically sheared packings composed of platy particles in three dimensions with increasing aspect ratio.…”

Section: Introductionmentioning

confidence: 99%

Particle alignment and clustering in sheared granular materials composed of platy particles

Boton¹,

Estrada²,

Azéma³

et al. 2014

Eur. Phys. J. E

View full text Add to dashboard Cite

Abstract. By means of molecular dynamics simulations, we investigate the texture and local ordering in sheared packings composed of cohesionless platy particles. The morphology of large packings of platy particles in quasistatic equilibrium is complex due to the combined effects of local nematic ordering of the particles and anisotropic orientations of contacts between particles. We find that particle alignment is strongly enhanced by the degree of platyness and leads to the formation of face-connected clusters of exponentially decaying size. Interestingly, due to dynamics in continuous shearing, this ordering phenomenon emerges even in systems composed of particles of very low platyness differing only slightly from spherical shape. The number of clusters is an increasing function of platyness. However, at high platyness the proportion of face-face interactions is too low to allow for their percolation throughout the system. PACS. PACS-key discribing text of that key -PACS-key discribing text of that key

show abstract

Three-Dimensional Discrete Element Method of Analysis of Clays

Cited by 96 publications

References 18 publications

Quasistatic rheology and microstructural description of sheared granular materials composed of platy particles

Quasistatic rheology and microstructural description of sheared granular materials composed of platy particles

Micromechanics of non-active clays in saturated state and DEM modelling

Particle alignment and clustering in sheared granular materials composed of platy particles

Contact Info

Product

Resources

About