Insights into the compressive and tensile strengths of viscocohesive–frictional particle agglomerates

Vo, Tam; Nguyen, Trung‐Kien

doi:10.1007/s40571-023-00601-1

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…Different numerical methods such as Material Point Method (MPM) [9,10], Smooth Particle Hydrodynamics (SPH) [11][12][13], and Discrete Element Method (DEM) [14,15] have been used for simulating landslides. DEM model is well known as an initial step for investigating and confirming the flow mobility of granular materials because this method has the advantage of easily considering the particle size distribution, changing the grain properties and model configurations, as well as assessing the microscopic properties to demonstrate the origins of macroscopic properties [16,17]. Indeed, by using DEM, different effects of slope morphology, aspect ratio, column thickness, and sliding volume of material on the flow mobility of granular materials have been investigated and explained [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Energy evolution of gravitational-granular flows

Anh,

Manh,

Thao

et al. 2024

JSTCE

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The catastrophe of natural disasters such as landslides, is a prevalent phenomenon in natural terrain conditions in high mountainous areas; however, the mobility of such landslides has not yet well understood due to the discrete nature of material and the coming to play of water. In this paper, we numerically study the mobility of an unsaturated gravitational-granular flow, occurring on a slope-break system that contains two regions: inclined-upstream and horizontal-downstream areas, by using three-dimensional discrete element simulations. A sliding volume composed of spherical grains collapses on the first region, then plunges and deposits on the second one. The upstream-plunging length and the cohesive stress exerted on grains affect differently on the energy evolution not only in the whole process but also in different regions and directions depending on the inclination angle. These findings provide a deep understanding of the mechanism and mobility of landslides, leading to good predictions about the potential impacts of the catastrophic landslides on buildings and human lives.

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Section: Introductionmentioning

confidence: 99%

Energy evolution of gravitational-granular flows

Anh,

Manh,

Thao

et al. 2024

JSTCE

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Predicting the rutting behaviour of asphalt concrete in the modified wheel tracking test using DEM and a cohesive viscoelastic–elastoplastic-damage contact model

Lu,

Bui,

Saleh

2024

Comp. Part. Mech.

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This study used an advanced modelling approach capable of capturing the complex behaviour of asphalt concrete to model the modified wheel tracking test using a recent advanced experimental test set-up in accordance with ASTM D8292-20. The modelling approach uses the discrete element method (DEM) to naturally produce the heterogeneous internal structure and governs the behaviour of asphalt concrete at the grain level by an interparticle contact model. The contact model used is capable of characterising the rate and time dependency, viscoelastic-damage, and plastic-damage behaviour of asphalt concrete utilising the coupling of an elastoplastic-damage law with a viscoelastic-damage law. Unlike the conventional wheel tracking tests run in a fixed boundary condition (fully confined), the modified wheel tracking test considers the effect of boundary conditions on the rutting behaviour of asphalt mixes. Through comparisons and verifications with laboratory data of the rutting test at different boundary conditions (fully confined and unconfined), the modelling approach shows its capability of capturing the rutting behaviour of asphalt concrete in the modified wheel tracking test. Micromechanics analysis shows that the third (tertiary) stage of rutting behaviour is due to the weakening of the internal structure of the asphalt samples with contact bond breaks over time, which is found in the unconfined test. Meanwhile, the tertiary stage hardly occurs in the fully confined test once densification leads to contact of the aggregate–aggregate skeleton, forming a rigid structure to resist the load with lateral support from the fixed boundary condition. Finally, a parametric study was also conducted to provide further insight into the current testing set-up, including the effect of the sample size and boundary condition on the rutting behaviour of asphalt concrete.

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Collapse dynamics and deposition morphology of low-viscocohesive granular columns on a rough horizontal surface

Vo,

Nguyen

2024

Phys. Rev. E

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Insights into the compressive and tensile strengths of viscocohesive–frictional particle agglomerates

Cited by 3 publications

References 40 publications

Energy evolution of gravitational-granular flows

Energy evolution of gravitational-granular flows

Predicting the rutting behaviour of asphalt concrete in the modified wheel tracking test using DEM and a cohesive viscoelastic–elastoplastic-damage contact model

Collapse dynamics and deposition morphology of low-viscocohesive granular columns on a rough horizontal surface

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