Particle shape matters – Using 3D printed particles to investigate fundamental particle and packing properties

Landauer, J. K.; Kühn, Michael; Nasato, Daniel Schiochet; Foerst, Petra; Briesen, Heiko

doi:10.1016/j.powtec.2019.11.051

Cited by 45 publications

(24 citation statements)

References 65 publications

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“…This is not only due to the development of advanced experimental devices or the increasing computational power and numerical techniques, but because many fundamental behaviors have already been described for assemblies of rigid grains [10,11]. Among these behaviors, we find the transition to jamming [12][13][14][15][16], the force transmission [17][18][19][20], or the effects induced by particle geometry [21][22][23][24][25][26][27][28][29][30], to name a few.…”

Section: Introductionmentioning

confidence: 95%

Micromechanical description of the compaction of soft pentagon assemblies

et al. 2021

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We analyze the isotropic compaction of assemblies composed of soft pentagons interacting through classical Coulomb friction via numerical simulations. The effect of the initial particle shape is discussed by comparing packings of pentagons with packings of soft circular particles. We characterize the evolution of the packing fraction, the elastic modulus, and the microstructure (particle rearrangement, connectivity, contact force, and particle stress distributions) as a function of the applied stresses. Both systems behave similarly: the packing fraction increases and tends asymptotically to a maximum value φ max , where the bulk modulus diverges. At the microscopic scale we show that particle rearrangements occur even beyond the jammed state, the mean coordination increases as a square root of the packing fraction, and the force and stress distributions become more homogeneous as the packing fraction increases. Soft pentagons experience larger particle rearrangements than circular particles, and such behavior decreases proportionally to the friction. Interestingly, the friction between particles also contributes to a better homogenization of the contact force network in both systems. From the expression of the granular stress tensor we develop a model that describes the compaction behavior as a function of the applied pressure, the Young modulus, and the initial shape of the particles. This model, settled on the joint evolution of the particle connectivity and the contact stress, provides outstanding predictions from the jamming point up to very high densities.

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Section: Introductionmentioning

confidence: 95%

Micromechanical description of the compaction of soft pentagon assemblies

et al. 2021

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“…Our previous investigations confirmed that the electrode performance is governed, among other factors, by the compact microstructure, which in turn depends on the particle properties and process conditions [10][11][12][13][14]. It is known that the shape of particles can significantly affect the particle packing process and, consequently, compact porous microstructure [14,15]. Non-spherically shaped particles are of great interest in current research on powder materials due to their positive impacts on compact mechanical properties, packing density, etc.…”

Section: Introductionmentioning

confidence: 66%

Porous Structure of Cylindrical Particle Compacts

et al. 2021

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The porous compacts of non-spherical particles are frequently used in energy storage devices and other advanced applications. In the present work, the microstructures of compacts of monodisperse cylindrical particles are investigated. The cylindrical particles with various aspect ratios are generated using superquadrics, and the discrete element method was adopted to simulate the compacts formed under gravity deposition of randomly oriented particles. The Voronoi tessellation is then used to quantify the porous microstructure of compacts. With one exception, the median reduced free volume of Voronoi cells increases, and the median local packing density decreases for compacts composed of cylinders with a high aspect ratio, indicating a loose packing of long cylinders due to their mechanical interlocking during compaction. The obtained data are needed for further optimization of compact porous microstructure to improve the transport properties of compacts of non-spherical particles.

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“…This is not only due to the development of advanced experimental devices or the increasing computational power and numerical technics, but because many fundamental behaviors have already been described for assemblies of rigid grains [10,11]. Among these behaviors, we find the transition to jamming [12][13][14][15][16], the force transmission [17][18][19][20], or the effects induced by particle geometry [21][22][23][24][25][26][27][28][29][30],…”

Section: Introductionmentioning

confidence: 90%

Micromechanical description of the compaction of soft pentagon assemblies

Cárdenas-Barrantes,

Cantor,

Barés

et al. 2020

Preprint

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We analyze the isotropic compaction of assemblies composed of soft pentagons interacting through classical Coulomb friction via numerical simulations. The effect of the initial particle shape is discussed by comparing packings of pentagons with packings of soft circular particles. We characterize the evolution of the packing fraction, the elastic modulus, and the microstructure (particle rearrangement, connectivity, contact force and particle stress distributions) as a function of the applied stresses. Both systems behave similarly; the packing fraction increases and tends asymptotically to a maximum value φmax, where the bulk modulus diverges. At the microscopic scale we show that particle rearrangements occur even beyond the jammed state, the mean coordination increases as a square root of the packing fraction and, the force and stress distributions become more homogeneous as the packing fraction increases. Soft pentagons present larger particle rearrangements than circular ones, and such behavior decreases proportionally to the friction. Interestingly, the friction between particles also contributes to a better homogenization of the contact force network in both systems. From the expression of the granular stress tensor, we develop a model that describes the compaction behavior as a function of the applied pressure, the Young modulus and the initial shape of the particles. This model, settled on the joint evolution of the particle connectivity and the contact stress, provides outstanding predictions from the jamming point up to very high densities.

show abstract

Particle shape matters – Using 3D printed particles to investigate fundamental particle and packing properties

Cited by 45 publications

References 65 publications

Micromechanical description of the compaction of soft pentagon assemblies

Micromechanical description of the compaction of soft pentagon assemblies

Porous Structure of Cylindrical Particle Compacts

Micromechanical description of the compaction of soft pentagon assemblies

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