Unified penetration depth of low-velocity intruders into granular packings

Vo, Tam; Nguyen, Trung‐Kien

doi:10.1103/physreve.106.014902

Cited by 7 publications

(3 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simulations are performed by using an in-house 3D molecular dynamics DEM program, namely cFGd-3D++code, originally developed by Mutabaruka [27]. This coding program is then improved by the author in order to apply to previous works and also for this current simulation [28][29][30]. The primary particles are modeled by using spheres as rigid bodies and interacting with others by considering the contact forces law based on a linear spring-dashpot model.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…The primary particles are modeled by using spheres as rigid bodies and interacting with others by considering the contact forces law based on a linear spring-dashpot model. The interactions between two primary particles i and j involve the normal contact forces f n , the tangential contact forces f t , and capillary cohesion forces f c [30], as shown in Fig. 1, where f n is obtained by considering the normal elastic and normal damping components, f t is determined by the Coulomb friction law [21], and the capillary cohesion force f c is proportional to the cohesion pre-factor κ = 2πγ s , where γ s denotes the liquid-vapor surface tension [30].…”

Section: Numerical Simulationmentioning

confidence: 99%

“…The interactions between two primary particles i and j involve the normal contact forces f n , the tangential contact forces f t , and capillary cohesion forces f c [30], as shown in Fig. 1, where f n is obtained by considering the normal elastic and normal damping components, f t is determined by the Coulomb friction law [21], and the capillary cohesion force f c is proportional to the cohesion pre-factor κ = 2πγ s , where γ s denotes the liquid-vapor surface tension [30]. The preparation and simulation of this current work involve three different stages: 1) creating assemblies of primary particles with different size polydispersities by using an isotropic compression; 2) extracting granules by applying a spherical probe into the packings of primary particles; 3) applying a constant downward velocity on the top platen to compress the granules.…”

Section: Numerical Simulationmentioning

confidence: 99%

See 2 more Smart Citations

Effects of the size polydispersity and friction coefficient on the compressive strength of wet granular materials

Nguyen

2023

STCE

View full text Add to dashboard Cite

We numerically study the effects of the size polydispersity and the friction coefficient on the compressive strength of wet granules under a diametrical compression test by using discrete element simulations. The nu-merical method is coupled with the capillary cohesion law which is enhanced by the cohesive forces between grains in the pendular regime. The wet granules are composed of primary spherical particles whose size poly-dispersity is varied from1 to 10 and the friction coefficient between grains is varied from0.1 to 1.0. By applying a constant compression velocity on the top plate in quasi-static regime, the granule is deformed but does not abruptly rupture due to the cohesive effects between grains and the rearrangement of primary particles. This no abrupt rupture is characterized by the appearance of the peak compressive stress in a long vertical strain before the onset failure of the granule. The compressive strength of the granule increases with increasing the friction coefficient for all cases of the size polydispersity but seemly declines for low values of the size polydispersity and almost level-off for high-size polydispersity with the friction coefficient larger than 0.5.

show abstract

Section: Numerical Simulationmentioning

confidence: 99%

Section: Numerical Simulationmentioning

confidence: 99%

Section: Numerical Simulationmentioning

confidence: 99%

See 1 more Smart Citation

Effects of the size polydispersity and friction coefficient on the compressive strength of wet granular materials

Nguyen

2023

STCE

View full text Add to dashboard Cite

show abstract

Dynamic characteristics of sphere impact into wet granular materials considering suction

Zhang

Wang

et al. 2023

Granular Matter

View full text Add to dashboard Cite

Investigating projectile penetration into immersed granular beds via CFD-DEM coupling

Lin,

Zhao,

Jiang

2023

Granular Matter

View full text Add to dashboard Cite

Projectile penetration into an immersed granular bed is a common phenomenon in both geophysics and engineering, encompassing various scenarios such as immersed crater formation and offshore soil-structure interaction. It involves the complex physical interaction between the fluid and granular materials. In this study, we investigate the dynamics of projectile penetration into a granular bed immersed in a fluid using a coupled computational fluid dynamics and discrete element method (CFD-DEM). The granular bed is composed of polydisperse particles, and the projectile is modeled as a rigid sphere. The morphology of crater formation, the dynamics of the projectile, and the drag force characteristics in immersed cases were studied in detail and compared to the dry scenario. The numerical results show that the final penetration depth of the projectile follows an empirical relation derived from experimental observations, where the falling height and the drag force during penetration obey a power-law function and a modified generalized Poncelet law, respectively. The interstitial fluid not only provides direct drag force, but also enhances the effective drag force of the granular bed by improving its generalized friction and effective viscosity in different configurations. Micro-analyses of the velocity evolution and contact force network in different stages of the fluid–solid interaction were performed to clarify the penetration dynamics. This research provides insights into the mechanisms of projectile penetration and the effects of interstitial fluid on granular media, which are crucial in engineering applications such as offshore anchoring, ball penetration tests in soft sediments, and soil-structure interactions. Graphical Abstract

show abstract

Unified penetration depth of low-velocity intruders into granular packings

Cited by 7 publications

References 49 publications

Effects of the size polydispersity and friction coefficient on the compressive strength of wet granular materials

Effects of the size polydispersity and friction coefficient on the compressive strength of wet granular materials

Dynamic characteristics of sphere impact into wet granular materials considering suction

Investigating projectile penetration into immersed granular beds via CFD-DEM coupling

Contact Info

Product

Resources

About