DEM analysis of energy dissipation in crushable soils

Wang, Jian Feng; Yan, Haibin

doi:10.1016/j.sandf.2012.07.006

Cited by 119 publications

(47 citation statements)

References 28 publications

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“…Interestingly, Wang & Yan (2012) reported that "the distribution of accumulated friction dissipation at large strains usually lacks a strongly preferred orientation". The inclusion of particle crushing or the development of large shear bands in the simulations of Wang & Yan (2012) might explain this apparent contradiction.…”

Section: Orientation Of Preferential Frictional Dissipationmentioning

confidence: 99%

“…The inclusion of particle crushing or the development of large shear bands in the simulations of Wang & Yan (2012) might explain this apparent contradiction.…”

Section: Orientation Of Preferential Frictional Dissipationmentioning

confidence: 99%

“…Firstly, to quantify the evolution of the individual components of energy during shearing of large-scale polydisperse numerical samples with differing initial void ratios to critical state. Secondly, to resolve a contradiction in the literature on the existence of a preferential orientation for frictional dissipation (Wang & Yan, 2012;Zhang et al, 2013) and propose an explanation for this behaviour. Thirdly, to extend the research of Cheng et al (2004) and Bolton et al (2008) by linking energy calculated from micro-scale measures to work equations of macro-scale constitutive models.…”

Section: Introductionmentioning

confidence: 96%

“…Cheng et al (2004) and Bolton et al (2008) quantify energy dissipation in their simulations of agglomerate crushing and use continuum Cam Clay models in their interpretation of the discrete data. Wang & Yan (2012) and Zhou et al (2013) also consider energy in their simulations of crushable agglomerates. In simulations where crushing is neglected, as in this paper, Zhang et al (2013) studied the balance between sliding dissipation and rolling dissipation for 2D simulations which included a rolling resistance model.…”

Section: Introductionmentioning

confidence: 99%

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Energy dissipation in soil samples during drained triaxial shearing

2018

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The discrete element method was used to simulate drained triaxial compression of large-scale, polydisperse numerical samples at a range of void ratios while tracing all relevant energy components.The frictional dissipation and boundary work are almost equal regardless of sample density. The volumetric work reaches a steady value at large strain. However, the distortional work increases continually as sample deformation continues post-critical state. There is a preferential orientation for frictional dissipation at around 45° to the major principal stress direction. This matches the orientation at which there is the largest number of sliding contacts. The work equations, which are fundamental in most commonly used constitutive models, are linear when plotted against deviatoric strain. The Modified Cam Clay work equation substantially over-predicts the frictional dissipation for dense samples. An alternative, thermodynamically-consistent work equation gives a much better description of frictional dissipation and is therefore recommended to ensure accuracy in modelling.

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Section: Orientation Of Preferential Frictional Dissipationmentioning

confidence: 99%

“…The inclusion of particle crushing or the development of large shear bands in the simulations of Wang & Yan (2012) might explain this apparent contradiction.…”

Section: Orientation Of Preferential Frictional Dissipationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Energy dissipation in soil samples during drained triaxial shearing

2018

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“…Such aggregates may represent real aggregates such as pellets and ceramic compacts or simply be regarded as a toy model for particle fracture. This bonded particle model (BPM) has been employed to investigate the behavior of crushable soils, rocks, fault gouge, and other materials [7,22,[32][33][34][35][36][37][38][39][40][41]. An alternative method consists in replacing a circular or spherical particle at its fracture threshold by several smaller fragments of the same shape [42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Bonded-cell model for particle fracture

et al. 2015

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Particle degradation and fracture play an important role in natural granular flows and in many applications of granular materials. We analyze the fracture properties of two-dimensional disklike particles modeled as aggregates of rigid cells bonded along their sides by a cohesive Mohr-Coulomb law and simulated by the contact dynamics method. We show that the compressive strength scales with tensile strength between cells but depends also on the friction coefficient and a parameter describing cell shape distribution. The statistical scatter of compressive strength is well described by the Weibull distribution function with a shape parameter varying from 6 to 10 depending on cell shape distribution. We show that this distribution may be understood in terms of percolating critical intercellular contacts. We propose a random-walk model of critical contacts that leads to particle size dependence of the compressive strength in good agreement with our simulation data.

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Bifurcation and Degradation of Geomaterials in the New Millennium

Chau¹,

Zhao²

2015

Springer Series in Geomechanics and Geoengineering

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About this SeriesGeomechanics deals with the application of the principle of mechanics to geomaterials including experimental, analytical and numerical investigations into the mechanical, physical, hydraulic and thermal properties of geomaterials as multiphase media. Geoengineering covers a wide range of engineering disciplines related to geomaterials from traditional to emerging areas.The objective of the book series is to publish monographs, handbooks, workshop proceedings and textbooks. The book series is intended to cover both the state-ofthe-art and the recent developments in geomechanics and geoengineering. Besides researchers, the series provides valuable references for engineering practitioners and graduate students.More information about this series at

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DEM analysis of energy dissipation in crushable soils

Cited by 119 publications

References 28 publications

Energy dissipation in soil samples during drained triaxial shearing

Energy dissipation in soil samples during drained triaxial shearing

Bonded-cell model for particle fracture

Bifurcation and Degradation of Geomaterials in the New Millennium

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