Discrete modeling of penetration tests in constant velocity and impact conditions

Tran, Quoc Anh; Chevalier, Bastien; Breul, Pierre

doi:10.1016/j.compgeo.2015.08.010

Cited by 25 publications

(22 citation statements)

References 12 publications

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“…The resistance force acting on intruders during penetration into granular materials is of interest not only in granular physics [1][2][3][4][5][6][7][8][9][10][11][12], but also in engineering applications, such as cone penetration tests [13][14][15][16][17][18][19][20][21], pile installations [22][23][24][25][26][27][28], the digging of mining machineries [29], and the locomotion of legged robots over rough terrain [30]. Previous studies have demonstrated that the penetration resistance is affected by the particle size [12,14,16,17,20,21,31], bulk packing fraction [2,9,12,17,19,21,25], penetration depth [3,4,7,…”

Section: Introductionmentioning

confidence: 99%

Influence of particle size on vertical plate penetration into dense cohesionless granular materials (large-scale DEM simulation using real particle size)

et al. 2019

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The influence of the particle size on the vertical plate penetration into dense cohesionless granular materials was numerically investigated. Simulations were performed in quasi-two-dimensional conditions by changing the mean particle diameters d 50 but maintaining the plate thickness B from B/d 50 = 63-2.6. The initial bulk packing fraction was kept high, irrespective of the particle size. In the smallest particle size case (B/d 50 = 63), the size ratio reached almost the same level as that in the laboratory experiments using natural sand particles. The results demonstrated that the mean penetration resistance force acting on the plate tip surface increases with a decrease of B/d 50 , while the tangential force acting on the side surfaces does not change with B/d 50 . Tip resistances increase linearly with the penetration depth, while the tangential resistances increase with the square of the depth regardless of B/d 50 . The behavior of the resistance fluctuations changes qualitatively between B/d 50 = 31 and 21. For all cases, we confirmed the formation of a wedge-shaped flow with a high forward velocity in front of the plate tip. The wedge flow width was larger than the plate thickness by almost a mean particle diameter, and was responsible for the increase in the mean resistance depending on the particle size. For the large B/d 50 cases only, the resistance exhibited quasiperiodic fluctuations, which was attributable to the intermittent nucleation and disappearance of the shear bands. Moreover, we investigated the dependence of B/d 50 on the band evolutions by analyzing the band thickness.

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Section: Introductionmentioning

confidence: 99%

Influence of particle size on vertical plate penetration into dense cohesionless granular materials (large-scale DEM simulation using real particle size)

et al. 2019

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“…The description of the model and the effect of the impact velocity are addressed in the papers of Tran [6,7].…”

Section: Numerical Modelmentioning

confidence: 99%

“…Dynamic penetration test presented by Tran [6,7] with tip details. 3 Investigation of load -penetration curve…”

Section: Numerical Modelmentioning

confidence: 99%

“…In this paper, we will present at first the numerical model and parameters used to reproduce the dynamic penetration test in granular media presenting different properties, using DEM, as well as the method used to analyze the load -penetration curve [6,7]. The following section explains how the load -penetration curve obtained from dynamic cone penetration tests was analyzed.…”

Section: Introductionmentioning

confidence: 99%

“…In order to validate the methods of analysis and to better analyze the load -penetration curve obtained, many works focused on penetration tests in dynamic conditions with impacts by using DEM in 2D and in 3D [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Effect of the characteristics of granular media on dynamic penetration test - Numerical study using 2D - DEM

2017

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Abstract. The paper presents a numerical study on the influence of the properties of granular media on light dynamic penetration test results. A numerical model based on the Discrete Element Method (DEM) in 2 dimensions has been carried out. The model is able to reproduce the penetration tests in dynamic conditions. The model provide for each impact, the load-penetration curve that presents the evolution of reaction forces of granular media acting on the tip of the penetration test. The load -penetration curves are investigated in terms of tip resistance and analyzed by using the Discrete Fourier Transform in order to study the oscillations of the curves. The influence of the properties of granular media on the load-penetration curve has been investigated. We concentrated on the influence of particle friction and sample compacity. Besides the known results obtained in the literature by the dynamic tip resistance analysis for macroscopic response, we found that for a particle friction greater than 0.5, tip resistance and oscillations of signal are stable. Concerning the sample compacity, although variation of volume fraction is tight (φ = 0.817 -0.844), a clear variation in terms of tip resistance and amplitude spectrum is highlighted.

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Hybrid Continuous-Discrete Modeling of an Ordinary Stone Column and Micromechanical Investigations

2021

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Discrete modeling of penetration tests in constant velocity and impact conditions

Cited by 25 publications

References 12 publications

Influence of particle size on vertical plate penetration into dense cohesionless granular materials (large-scale DEM simulation using real particle size)

Influence of particle size on vertical plate penetration into dense cohesionless granular materials (large-scale DEM simulation using real particle size)

Effect of the characteristics of granular media on dynamic penetration test - Numerical study using 2D - DEM

Hybrid Continuous-Discrete Modeling of an Ordinary Stone Column and Micromechanical Investigations

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