DEM simulation of granular media—structure interface: effects of surface roughness and particle shape

Jensen, Richard P.; Bosscher, Peter J.; Plesha, Michael E.; Edil, Tuncer B.

doi:10.1002/(sici)1096-9853(199905)23:6<531::aid-nag980>3.3.co;2-m

Cited by 35 publications

(45 citation statements)

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“…DEM simulation treats the granular material as an assembly of particles that interact via a contact logic and can offer a thorough perspective of the response at the particulate level as well as the overall behaviors. Jensen et al [19] demonstrated the particle rotations and the shear strength greatly depends on the particle shape. Polygonal particles are also used to investigate the influence of particle shape on the mechanical behavior both in macro-and microscales, see [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Wang

2012

Granular Matter

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Section: Introductionmentioning

confidence: 99%

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

Yang

Wang

2012

Granular Matter

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“…The increase in particle angularity and surface roughness tends to increase the friction angle attributed to the high frictional resistance to particle rotation, translation and particle interlocking, often resulting in the dilatancy [7][8][9]. As the spherical particles are too idealized, the clumping multiple disc elements often capture not only particle shape effect but also particle interlocking to observe the evolution of dilatancy and strength [4,[10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the at-rest earth pressure coefficient of granular materials

Yun

Lee

et al. 2015

Granular Matter

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The at-rest earth pressure coefficient, K 0 , is one of the most fundamental values for evaluating in-situ soil stresses and designing foundation. Research has been expanded to investigate the correlation between K 0 and micro-scale characteristic of granular soils, beyond the macroscopic approach empirically correlated with internal friction angle. This study presents the evolution of K 0 values of irregularly shaped natural sand, spherical shaped smooth and rough surfaced glass beads along with the stress history, estimated by the discrete element method. The surface roughness and non-spherical particles were emulated by inter-particle friction coefficient and the clumped particles. Results exhibit that the K 0 during loading stage nonlinearly decreases with increasing values of friction coefficient and the assemblies with clumped particles present the lower values of K 0 than spherical particle assemblies of the same friction coefficient. The varying friction coefficient seems enough to capture the evolution of K 0 during loading, unloading and reloading cycles, while the natural sand inevitably B Junhwan Lee requires the assembly with clumped particles to capture the experimentally observed K 0 evolutions.

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“…The constitutive model for complex geo-materials both in continuum and in discontinuum domains (Thorton and Sun 1994;Feda 1998;Jensen et al 1999;Masson and Martinez 2000;Thorton 2000;Desai 2001;Sakakibara et al 2004;Kayama and Jing 2007;Xie and Zhao 2009) underwent several stages of developments in the recent past. In micromechanical approach, the laboratory test results of the physical OB material matched in the biaxial simulation tests and interpreted from the microscopic parameter at modelling stage.…”

Section: Introductionmentioning

confidence: 99%

Earthquake response of external mine overburden dumps: a micromechanical approach

Koner

Chakravarty

2010

Nat Hazards

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The huge piles of overburden comprising of fragmented rocks and loose soil are dumped within the leasehold area causing serious environmental problems in view of occasional sliding and the risks of miner's life. The continuum-based numerical approach ignores the discrete nature of the geo-materials found in external overburden dump, in terms of both composition and interactions. Engineering mechanics in the discontinuum regime has been utilized to overcome the mentioned limitations. The distinct element method is employed to characterize the overburden dump geometry and the associated physical behaviour of the dump mass for seismic loads. The study discussed about the earthquake vibration responses and assessed the internal dynamics of the dump mass system.

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DEM simulation of granular media—structure interface: effects of surface roughness and particle shape

Cited by 35 publications

References 0 publications

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

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

Numerical investigation of the at-rest earth pressure coefficient of granular materials

Earthquake response of external mine overburden dumps: a micromechanical approach

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