Failure Mechanism of True 2D Granular Flows

Nguyen, Cuong T.; Bui, Ha H.; Fukagawa, Ryoichi

doi:10.1252/jcej.14we358

Cited by 23 publications

(24 citation statements)

References 14 publications

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“…Nguyen et al [9] showed that there are differences between his results with those of previous authors.…”

Section: Introductionmentioning

confidence: 58%

“…A series of physical experiment model (in the laboratory), barrier is used to keep stable granular column during the experimental model setup stage. Barrier will be removed appropriately [9] to minimize the influence on granular columns collapse process. The numerical experiments which don't have barrier, the initial setup for the granular column with initial column height h 0 and initial granular column width d 0 in Figure 1.…”

Section: Setup For Model Of Experimentsmentioning

confidence: 99%

“…Trepanier et al used granular rods as granular materials to conduct 3D granular flow experiments and Tran took the result at the symmetric section through the center as a 2D numerical model results. Only Bui [7] and Nguyen et al [8,9,10] used truly 2D materials and conducted 2D standard experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, they can obtain accurate results in some cases that are difficult or impossible. The results will be used to consider experimental functions more comprehensively about the failure flow characteristics of 2D granular columns based on a series of physical experiment model by Nguyen et al [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Studying on Failure Mechanism of 2d Granular Columns: Numerical Results

Nguyen

2020

JST

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The failure mechanism of granular columns and the characteristics of this failure flows have been intersted in researching in recent years. In particular, the experiments in failure mechanism and failure flow of 2D granular column are not often 2D standard. Therefore, Cuong T. Nguyen et al. (2015) conducted research this problem based on 2D standard in the laboratory and developed a numerical computation model using SPH (Smooth Particles Hydrodynamics) method (Cuong T. Nguyen et al., 2017). This model has proven the reliability by verification of calculation and experimental results. In this paper, the developed numerical model is used to perform a series of numerical experiments that some are difficult or impossible to obtain accurate results by physical experiment model to re-examine the previously identified characteristics and find out the rules more general of this failure flow.

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“…Nguyen et al [9] showed that there are differences between his results with those of previous authors.…”

Section: Introductionmentioning

confidence: 58%

Section: Setup For Model Of Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Studying on Failure Mechanism of 2d Granular Columns: Numerical Results

Nguyen

2020

JST

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“…We simulate the experiment of Nguyen [2015] by using different viscous value to test the influence of viscosity. From Fig.…”

Section: Effect Of Viscositymentioning

confidence: 99%

Viscous Elastoplastic SPH Model for Long-Distance High-Speed Landslide

Zhang

Shi

et al. 2018

Int. J. Comput. Methods

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In the landslide-induced debris flow problem, the soil slope experiences three stages: slope instability, debris flow and deposition. This study develops a three-dimensional smoothed particle hydrodynamics model which adopts elastoplastic viscous constitutive relation to simulate this complex process. The Drucker–Prager model with nonassociated plastic flow rule is implemented for slope instability and deposition and constant viscosity is used for propagation stage. The model is validated with laboratory dry-granular dam-break experiments. Good agreements are found between the simulated results and the laboratory data on both the shape evolution and the velocity field. Then, we use the model to study the Yigong avalanche after detailed discussion of model parameters, the time of duration, deposited scope and estimated velocity essentially agree with site survey. Thus, the model is able to simulate instability and flow of dense granular materials at both experimental and field scale, and it could be a powerful tool for the landslide-induced debris flow study.

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Circumventing volumetric locking in stabilized smoothed particle finite element method and its application to dynamic large deformation problems

Liu,

Huang,

Gou

et al. 2023

Num Anal Meth Geomechanics

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The smoothed particle finite element method (SPFEM) is an effective framework for large deformation analysis. The original SPFEM possesses the rank deficiency issue due to the direct nodal integration technique, which can be overcome by incorporating the strain gradient stabilization method. However, an extra volumetric locking due to the strain gradient stabilization term has been found. In this study, we propose a simple and efficient approach, the B‐dev approach, which only considers the deviatoric part of the smoothed strain gradient for stabilization to overcome the volumetric locking issue. First, the correctness of the stabilized SPFEM method is verified by an elastic cantilever beam vibration problem without considering incompressibility. Then, through the example of the strip footing penetration problem, the volumetric locking in the stabilized SPFEM is demonstrated and the capability of the proposed B‐dev approach in terms of overcoming the volumetric locking is verified. Furthermore, the stabilized SPFEM with B‐dev approach is applied to two types of elastoplastic problems in geotechnical engineering. All numerical results illustrate that the proposed approach can improve the performance of the stabilized SPFEM in dealing with incompressible and large deformation problems in geomechanics.

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Failure Mechanism of True 2D Granular Flows

Cited by 23 publications

References 14 publications

Studying on Failure Mechanism of 2d Granular Columns: Numerical Results

Studying on Failure Mechanism of 2d Granular Columns: Numerical Results

Viscous Elastoplastic SPH Model for Long-Distance High-Speed Landslide

Circumventing volumetric locking in stabilized smoothed particle finite element method and its application to dynamic large deformation problems

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