On the influence of inter-particle friction and dilatancy in granular materials: a numerical analysis

Yang, Z. X.; Yang, Jie; Wang, L. Z.

doi:10.1007/s10035-012-0348-x

Cited by 82 publications

(30 citation statements)

References 47 publications

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“…In line with the observations of Thornton and Yang et al . amongst others, for the free rotation simulations, the increase in φ ′ cv with φ ' p is non‐linear, that is, there is a marked increase in φ ' cv with increasing φ ' p until φ ' p ≈ 20°, that is, until μ ≈ 0.36. When φ ' p > 20°, the relative influence of increases in φ ' p (and μ ) is less evident.…”

Section: Macroscale Responsementioning

confidence: 92%

“…Finally, Table V lists a total of 34 Dunkirk sand simulations, carried out using LAMMPS and the HM contact model (G = 29.17 GPa and v = 0.2). This study builds upon the earlier work of Pena et al [20] and Yang et al [21] by considering a broader range of stress levels, test types, and packing density to facilitate a more comprehensive analysis of the effects of μ on the critical state line (CSL) in both q-p′ and e-log ( p′) space.…”

Section: Dem Simulationsmentioning

confidence: 96%

“… and Yang et al . by considering a broader range of stress levels, test types, and packing density to facilitate a more comprehensive analysis of the effects of μ on the critical state line (CSL) in both q–p′ and e ‐log ( p′ ) space.…”

Section: Dem Simulationsmentioning

confidence: 99%

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Exploring the influence of interparticle friction on critical state behaviour using DEM

Huang

Hanley

O’Sullivan

et al. 2014

Num Anal Meth Geomechanics

174

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SUMMARY Understanding the extent to which discrete element method (DEM) simulations can capture the critical state characteristics of granular materials is important to legitimize the use of DEM in geomechanics. This paper documents a DEM study that considered the sensitivity of the critical state response characteristics to the coefficient of interparticle friction (μ) using samples with gradings that are representative of a real soil. Most of the features that are typically associated with sand behaviour at the critical state were seen to emerge from the DEM simulation data. An important deviation occurs when high μ values (μ ≥ 0.5) are used, as has been the case in a number of prior DEM studies. While there is a systematic variation in the critical state behaviour with μ for μ < 0.5, when μ ≥ 0.5, the behaviour at the critical state seems to be insensitive to further increases in μ. In contrast to observations of conventional soil response, when μ ≥ 0.5, the void ratio at the critical state initially increases with increasing mean effective stress (p′). Analysis of the DEM data and use of simple models of isolated force chains enabled some key observations. When ‘floating’ particles that do not transmit stress are eliminated from the void ratio calculation, the void ratio at the critical state decreases consistently with increasing p′. There is a transition from sliding to rolling behaviour at the contact points as μ increases. Beyond a limiting value of μ, further increases in μ do not increase the buckling resistance of individual strong force chains. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Macroscale Responsementioning

confidence: 92%

Section: Dem Simulationsmentioning

confidence: 96%

See 1 more Smart Citation

Exploring the influence of interparticle friction on critical state behaviour using DEM

Huang

Hanley

O’Sullivan

et al. 2014

Num Anal Meth Geomechanics

174

View full text Add to dashboard Cite

show abstract

“…Our results also reveal that dilatancy of deformation bands in both rounded and angular sands decreases with increasing confining pressure, which agrees with other studies. 15,[29][30][31] It should be mentioned that those studies measured the dilatancy of entire tested sample, e.g. by measuring axial and lateral strains and calculating the volumetric and shear strains, while we measure the dilatancy of a localized zone or a deformation band, by employing 3D Digital Image Correlation (DIC) method (see Section 2 and Table 1).…”

Section: Impact Of Dilatancymentioning

confidence: 99%

Micro-texture and petrophysical properties of dilation and compaction shear bands in sand

Alikarami

Torabi

2015

Geomechanics for Energy and the Environment

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“…An additional series of simulations allowed for the detailed study of the effect of varying the interparticle friction coefficient, μ p−p , as a proxy for particle surface roughness. It should be noted that while the interparticle friction coefficient does not simulate the geometry associated with the surface roughness of natural particles, it does emulate the effect of particle roughness on mobilized strength and volume change behavior of granular assemblies .…”

Section: Micro‐scale and Macro‐scale Shear Behaviors: Multi‐scale Linksmentioning

confidence: 99%

Particle‐scale effects on global axial and torsional interface shear behavior

Martínez

Frost

2016

Num Anal Meth Geomechanics

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Summary An extensive literature on the shear behavior of continuum–particulate interfaces has been developed during the last four decades. However, relatively limited work regarding the behavior of interfaces under different loading conditions has been published. This paper presents a discrete element modeling study, along with comparisons from experimental data, of interface behavior under axial and torsional drained loading conditions. Detailed studies allow for links between micro‐scale particle behavior and observed global response to be developed and for the latter to be evaluated in light of particle–particle and particle–continuum interactions. The results of this study indicate that axial and torsional interface shear induce inherently different loading conditions, as shown by the different failure envelopes, stress paths, and induced soil volume changes and deformations. Furthermore, the results presented in this paper indicate that particle‐level mechanisms, such as particle rotations and contact slippage, play different roles in axial and torsional shear. Coordination number, polar histograms, particle displacements, particle rotations, and local void ratio measurements provide further insights into the fabric evolution, loading conditions, and failure mechanisms induced by these two shear modes. This study expands the current understanding of interface behavior and discusses potential improvements to geotechnical systems that leverage the characteristics of different imposed loading conditions. Copyright © 2016 John Wiley & Sons, Ltd.

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On the influence of inter-particle friction and dilatancy in granular materials: a numerical analysis

Cited by 82 publications

References 47 publications

Exploring the influence of interparticle friction on critical state behaviour using DEM

Exploring the influence of interparticle friction on critical state behaviour using DEM

Micro-texture and petrophysical properties of dilation and compaction shear bands in sand

Particle‐scale effects on global axial and torsional interface shear behavior

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