Structural and Micromechanical Properties of Ternary Granular Packings: Effect of Particle Size Ratio and Number Fraction of Particle Size Classes

Wiącek, Joanna; Stasiak, Mateusz; Kafashan, Jalal

doi:10.3390/ma13020339

Cited by 13 publications

(3 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the modeling of ore is relatively simple, such as all ore particles being circular. In actual excavation, ore models are complex and diverse [15][16][17]. In order to simulate the actual excavation process under different geological conditions, the shape and size of the ore models should be as close as possible to the shape and size of actual ores.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Excavator Bucket Structure by a Coupled Simulation Method

Wang,

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

As a component directly in contact with materials in the excavation process of the excavator, the structure and performance of the bucket directly affect the efficiency of the excavator. With the increasingly prominent environmental and energy problems, it has become a research difficulty to optimize the bucket structure of excavators so as to reduce the digging resistance and energy consumption of excavators. Therefore, an orthogonal optimization method of bucket structure that couples Adams with EDEM was proposed to explore the excavation performance of buckets with different structures under different geological conditions. The particle size distribution and mass proportion of various ores under different geological conditions were obtained through geological investigation, and particle models with different shapes and sizes were constructed. The friction coefficient and collision recovery coefficient between bucket and ore and between ore and ore were measured using a self-made testing device. The results show that the excavation resistance of the bucket teeth during the excavation process is much greater than that of other components, and optimizing the bucket structure can effectively reduce the excavation resistance of the bucket teeth. Under different geological conditions, the optimization parameter combinations of bucket structure obtained through orthogonal experiments are different. In addition, after structural optimization, the excavation resistance and energy consumption of the bucket were reduced, and the filling rate was also improved.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization of Excavator Bucket Structure by a Coupled Simulation Method

Wang,

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The DEM is widely used in the field of agricultural engineering, and its parameters are crucial to the simulation results [1][2][3][4][5][6][7][8][9][10]. For soybean seed particles, parameters play a crucial role in the simulation results when DEM is used to analyze the movement of the particles, the contact interaction between the particles, and between the particles and the boundary.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Calibration of DEM Parameters of Soybean Seed Particles

Yan

Wang

et al. 2022

Agriculture

View full text Add to dashboard Cite

In discrete element method (DEM) simulations, accurate simulation parameters are very important. For ellipsoidal soybean seed particles, the rolling friction coefficient between seed particles (RFCP-P) and the rolling friction coefficients between seed particle and boundary (RFCP-B) are difficult to measure experimentally and therefore need to be calibrated. In this paper, soybean seed particles of three varieties with different sphericities were taken as the research objects. Through the simulation analysis of repose angle and self-flow screening, it was shown that the above two parameters needed to be accurately calibrated. In addition, the sensitivity of the RFCP-P and RFCP-B to the angle of repose was analyzed by simulating the repose angle test. The results showed that the RFCP-P had a significant effect on the test results of the repose angle, and the RFCP-B had little effect on the test results of the repose angle. Therefore, the RFCP-P was calibrated using a single-factor test of repose angle, and the RFCP-B was calibrated using the repose angle test with soybean particles mixed with organic glass spheres. The accuracy of the calibration parameters was verified by rotating cylinder test and self-flow screening test.

show abstract

“…It is known that the particle size ratio greatly affects the voidage and thus tortuosity values [ 44 ]. Additionally, even numerous studies have been already dedicated to analysis of binary systems [ 45 , 46 , 47 , 48 ], there are limited numerical studies on the structural properties of ternary mixtures of spheres [ 44 , 49 , 50 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Tortuosity in Compacts of Ternary Mixtures of Spherical Particles

et al. 2020

View full text Add to dashboard Cite

Herein, an approach is proposed to analyze the tortuosity of porous electrodes using the radical Voronoi tessellation. For this purpose, a series of particle compacts geometrically similar to the actual porous electrode were generated using discrete element method; the radical Voronoi tessellation was constructed for each compact to characterize the structural properties; the tortuosity of compact porous structure was simulated by applying the Dijkstra’s shortest path algorithm on radical Voronoi tessellation. Finally, the relationships were established between the tortuosity and the composition of the ternary particle mixture, and between the tortuosity and the radical Voronoi cell parameters. The following correlations between tortuosity values and radical Voronoi cell parameters were found: larger faces and longer edges of radical Voronoi cell leads to the increased fraction of larger values of tortuosity in the distribution, while smaller faces and shorter edges of radical Voronoi cell contribute to the increased fraction of smaller tortuosity values, being the tortuosity values more uniform with narrower distribution. Thus, the compacts with enhanced diffusion properties are expected to be obtained by packing particle mixtures with high volume fraction of small and medium particles. These results will help to design the well-packed particle compacts having improved diffusion properties for various applications including porous electrodes.

show abstract

Structural and Micromechanical Properties of Ternary Granular Packings: Effect of Particle Size Ratio and Number Fraction of Particle Size Classes

Cited by 13 publications

References 35 publications

Optimization of Excavator Bucket Structure by a Coupled Simulation Method

Optimization of Excavator Bucket Structure by a Coupled Simulation Method

Measurement and Calibration of DEM Parameters of Soybean Seed Particles

Analysis of Tortuosity in Compacts of Ternary Mixtures of Spherical Particles

Contact Info

Product

Resources

About