Investigation of dynamics simulation of granular particles using spherocylinder model

Kidokoro, Tohru; Arai, Ryohei; Saeki, Masato

doi:10.1007/s10035-015-0595-8

Cited by 13 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, we do not compute the projection of the single constituent beads, which defines a set of filled circles on the plane i-j. Instead, for simplicity, we approximate the complex multisphere particles by intersecting spherocylindrical shells [38], and we compute A and P from the projection of these shells on the plane i-j. As an example, the perimeter P and the area A obtained from the projection of particle #8 (the cross) is shown on the bottom of table 1.…”

Section: Particle Shapesmentioning

confidence: 99%

“…Indeed, the aim of the present analysis is to quantify the main geometric characteristics influencing the particle's rotational behavior, that is the degree of non-sphericity of the multisphere particle shapes, which is why we choose the shape parameters listed above. Moreover, we note that previous DEM simulations using spherocylinders have been presented in [38]. However, here we adopt the multisphere method in the simulations as it leads to an efficient computation of particle-particle contact detection, while with the generated multisphere particles it is possible to capture the main characteristics associated with the rotational behavior of the different modeled shapes.…”

Section: Particle Shapesmentioning

confidence: 99%

See 1 more Smart Citation

Granular dampers: does particle shape matter?

2016

View full text Add to dashboard Cite

By means of particle-based numerical simulations using the discrete element method, we address the question of how the performance of granular dampers is affected by the shape of the granular particles. In consistence with previous experiments performed with nearly spherical particles we find that independently of the particles' shape, the granular system is characterized by a gas-like regime for small amplitudes of the container's oscillation and by a collect-and-collide regime for large amplitude forcing. Both regimes are separated by an optimal operation mode-the critical amplitude of the damping oscillation for which the energy dissipation is maximal-which is independent of the particle shape for given conditions of particle mass, material properties and number of particles. However, in the gas-like regime, we find that spherical particles lead to more efficient energy dissipation compared to complex shaped particles of the same mass. In this regime, a dependence on the damper's efficiency on the particle shape is found. performance and operation mode of granular dampers, that is, the average value of total dissipated energy per oscillation cycle, in response to the vibration amplitude [28,29].

show abstract

Section: Particle Shapesmentioning

confidence: 99%

Section: Particle Shapesmentioning

confidence: 99%

Granular dampers: does particle shape matter?

2016

View full text Add to dashboard Cite

show abstract

“…where the parameter α depends on the shape of contact area and is determined to be 0.974 by Kidokoro et al Parallel cylinder–cylinder contact:

F_{n}^{c} = \frac{italicκπ L_{c}}{2 ((), 1.8864 + italicln \frac{L_{normalc}}{2 b})} \frac{E_{normalc}}{(1 - ν^{2})} δ_{n}

…”

Section: Triaxial Compression Simulationsmentioning

confidence: 99%

“…Two contact scenarios exist for the fiber–wall contacts: parallel contact and inclined contact. In the present simulations, different contact force models are used for different contact types, in order to account for the difference in contact forces, as discussed in the previous work . The Mindlin model is used for the tangential contact forces.…”

Section: Triaxial Compression Simulationsmentioning

confidence: 99%

An Investigation on triaxial compression of flexible fiber packings

Guo

Liu

et al. 2020

AIChE Journal

View full text Add to dashboard Cite

This article examines the mechanical response of flexible fiber packings subject to triaxial compression. Short fibers yield in a manner similar to typical granular materials in which the deviatoric stress remains nearly constant with increasing strain after reaching a peak value. Interestingly, long fibers exhibit a hardening behavior, where the stress increases rapidly with increasing strain at large strains and the packing density continuously increases. Phase diagrams for classifying the bulk mechanical response as yielding, hardening, or a transition regime are generated as a function of the fiber aspect ratio and fiber-fiber friction coefficient. Large fiber aspect ratio and large fiber-fiber friction coefficient promote hardening behavior. The positions of boundaries between different regimes depend on the confining pressure and fiber flexibility. The hardening packings can support much larger loads than the yielding packings, but larger internal axial forces within fibers and larger fiber-fiber contact forces occur.

show abstract

“…These different cases imply that assuming a constant contact stiffness may not be reasonable for spherocylindrical particles. Recent work by Kidokoro et al did account for the varying stiffnesses associated with these various contact geometries but did not account for transitions. Prior experience by the current authors has shown that an abrupt change in force can occur if a contact transitions from one type to another, with a corresponding abrupt and unrealistic acceleration of the contacting particles.…”

Section: Introductionmentioning

confidence: 99%

Influence of normal contact force model on simulations of spherocylindrical particles

et al. 2018

View full text Add to dashboard Cite

How the choice of elastic normal contact force model affects predictions from discrete element method simulations of spherocylindrical particles is investigated in this article. Three force models were investigated: (1) a Hertzian force model (HFM) which assumes a circular contact area; (2) a linear force model (LFM) with a constant stiffness; and (3) a modified HFM (MFM) that accounts for various contact areas and contact transitions. With the MFM, transitions between contact area types must be accounted for otherwise discontinuities in the contact force can occur. It is found that simple force models (HFM, LFM) can be substituted for more accurate force models if only force data and bulk properties are of interest. However, if more detailed contact information, such as contact area, contact overlap, contact duration, or collision frequency, are needed, for example, in population balance models and transient liquid bridge modeling, then a more accurate force model should be used. The red band is the range of angles reported in the literature by B€ orzs€ onyi et al., 40 Guo et al., 41 and Hua et al. 4 [Color figure can be viewed at wileyonlinelibrary.com]

show abstract

Investigation of dynamics simulation of granular particles using spherocylinder model

Cited by 13 publications

References 19 publications

Granular dampers: does particle shape matter?

Granular dampers: does particle shape matter?

An Investigation on triaxial compression of flexible fiber packings

Influence of normal contact force model on simulations of spherocylindrical particles

Contact Info

Product

Resources

About