Influence of particle eccentricity on micromechanical behavior of granular materials

Rothenburg, L.; Bathurst, Richard J.

doi:10.1016/0167-6636(93)90037-r

Cited by 43 publications

(18 citation statements)

References 7 publications

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“…This result has been reproduced many times in other experiments and DEM simulations (e.g. Bardet and Proubet, 1991;Iwashita and Oda, 2000;Rothenburg and Bathurst, 1993;Sidoroff et al, 1993;Kruyt and Rothenburg, 2003). Typically, the contact distribution is found to be of the bipolar form given by Eq.…”

Section: Shear Band Analysis and Resultssupporting

confidence: 54%

Micromechanics of shear bands

Gardiner

Tordesillas

2004

International Journal of Solids and Structures

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Section: Shear Band Analysis and Resultssupporting

confidence: 54%

Micromechanics of shear bands

Gardiner

Tordesillas

2004

International Journal of Solids and Structures

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“…However, MDEM can not be used when it is aimed to study the inherent anisotropy in granular materials, because there is no elongation and preferred orientation in the geometry of circular/spherical particles. As another alternative for the above mentioned imperfection of circular/spherical particles is to use non-circular/non-spherical particles, which are often elliptical/oval in shape and are used in both 2-D [27,34,35] and 3-D simulations [36]. Ideas for creating non-circular/non-spherical particles are clusters of bonded circles/spheres [37] or overlapping rigid clusters [38].…”

Section: Introductionmentioning

confidence: 99%

Investigating the micromechanical evolutions within inherently anisotropic granular materials using discrete element method

Hosseininia

2012

Granular Matter

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“…It has been used in Li & Yu (2013) to provide the mathematical background for the Stress-Force-Fabric relationship, which was originally proposed by Rothenburg & Bathurst (1989) explicitly expressing the stress tensor in terms of parameters characterising coordination number, force and fabric anisotropies (Rothenburg & Bathurst 1989;Rothenburg & Bathurst 1993;Ouadfel & Rothenburg 2001). This work investigates the behaviour of unsaturated granular materials in pendular states by conducting Discrete Element simulations.…”

Section: Introductionmentioning

confidence: 99%

Stress–Force–Fabric Relationship for Unsaturated Granular Materials in Pendular States

Wang

2017

J. Eng. Mech.

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In this paper, we explore the particle-scale origin of the additional shear strength of unsaturated granular materials in pendular states induced by the capillary effect by applying the Stress-ForceFabric (SFF) relationship theory into unsaturated granular material stress analysis. The work is based on Discrete Element simulations with the particle interaction model modified to incorporate the capillary effect. By decomposing the total stress tensor into a contact stress tensor originating from contact forces and a capillary stress tensor due to capillary effect, the directional statistics of particlescale information have been examined. The observations have been used to support the choice of the appropriate analytical approximations for the directional distributions associated with the solid skeleton and water bridges respectively. The SFF relationship for unsaturated granular materials is hence formulated, which has been shown matching with the material stress state in good accuracy and used to interpret the material strength in terms of the relevant micro-parameters. Macro and micro observations are carried out on both relatively dense and loose samples in triaxial shearing path to the critical state. The capillary force remains nearly isotropic during triaxial shearing. Anisotropy in the water bridge probability density, however, develops alongside the anisotropy in contact normal density, which gets smaller when the suction level gets lower and the water content becomes higher.The anisotropy effect in the water phase is much smaller than the solid skeleton and it coupling effect with the solid phase makes the fabric anisotropy in wet materials smaller than that of the dry ones.Combining with the SFF function, it can be clarified that the increased solid coordination numbers and mean contact forces by water bridge effect are more important factors for the suction induced shear strength.

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Influence of particle eccentricity on micromechanical behavior of granular materials

Cited by 43 publications

References 7 publications

Micromechanics of shear bands

Micromechanics of shear bands

Investigating the micromechanical evolutions within inherently anisotropic granular materials using discrete element method

Stress–Force–Fabric Relationship for Unsaturated Granular Materials in Pendular States

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