Numerical simulation study on particle breakage behavior of granular materials in confined compression tests

Yu, Yang; Guo-fan, Zhao; Ren, Minghui

doi:10.1016/j.partic.2022.04.004

Cited by 7 publications

(2 citation statements)

References 50 publications

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“…conducted conventional triaxial tests on the engineering mechanical properties of cohesive soils and related numerical simulations of 3D granular flow, comparing the stress–strain relationship curves of 3D granular body specimens with the indoor triaxial at different confining pressures, respectively, and basically fitting and loading curves of the indoor tests and numerical simulations. Yu et al 25 explored the gangue damage characteristics through the side-limit compression test, and the research results showed that the contact force between gangue and gangue gradually changed from isotropic to anisotropic, and the failure mode under the contact force of gangue was mainly through the failure of single-pass cracks and the failure of multi-short cracks. Li et al 19 used PFC3D model to simulate and analyse the compression deformation characteristics of coal gangue under different particle sizes, and the research results show that the compression deformation has a significant regularity, and the distribution of the particle clusters also presents certain characteristics, at the same time, the research found that the greater the hardness of the gangue filling material, the better the effect of its filling, and further emphasizes the importance of the particle size grading of the crushed gangue particles.…”

Section: Introductionmentioning

confidence: 99%

Study on the macro–micro evolution of compaction characteristics of coal gangue with different grain sizes under side-limit compression conditions

Liu,

et al. 2024

Sci Rep

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Currently the main method of mine solid waste disposal and utilization is to apply gangue to underground filling. For the grading characteristics of coal gangue in the hollow zone in underground filling, the state of pressure and the mechanical properties of coal gangue filling materials under different particle sizes. In this paper, through laboratory tests and numerical simulations, the bearing characteristics and deformation damage of gangue are deeply investigated and analyzed from both macroscopic and microscopic perspectives. The results of the study show that when the axial pressure reaches a certain threshold, the strain increases accordingly with the increase in grain size. Under the axial pressure condition of 15MPa, the bearing capacity of gangue with different grain sizes under the lateral pressure of steel cylinder showed obvious positive correlation. In the software PFC3D simulation, as the particle size of gangue particles increases, it has a significant effect on the natural stacking porosity of the specimen, and gangue particles are more prone to force chain instability and failure. Mixed particle size gangue can significantly reduce the natural accumulation porosity of the specimen, thus improving its overall stability. Significant displacement triangles existed in the top and lateral directions of the B1 (0–5 mm), B2 (5–10 mm), and B5 (0–20 mm) specimens under the same circumferential pressure conditions. The results of the study are of great significance for further selection of reasonable gangue gradation and determination of its mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Study on the macro–micro evolution of compaction characteristics of coal gangue with different grain sizes under side-limit compression conditions

Liu,

et al. 2024

Sci Rep

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“…It is essential to determine the mechanical and deformation characteristics of agricultural products. To accomplish this, uniaxial compression tests are regarded as one of the most critical testing techniques (Tamás et al, 2015;Celik et al, 2017;Kacal and Koyuncu, 2017;Gao et al, 2021;Yu et al, 2023). However, the number of contacts in the actual machining process is different from the ideal uniaxial compression case for both solid and shell materials.…”

Section: Introductionmentioning

confidence: 99%

FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings

Han,

Su,

Zeng

et al. 2023

Front. Mater.

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Walnut shell breaking is an important aspect of post-harvest processing. However, shell-breaking results differ significantly from ideal uniaxial compression results. In this paper, the effect of multipoint loading on the walnut shell-breaking mechanism by combining FDEM with cohesive elements was investigated. The model for walnuts was created using micro-X-ray CT scans and experimental data. Simulation parameters describing mechanical properties were calibrated through modeling the uniaxial compression experiment. The loading point locations were quantitatively described in terms of top and azimuthal angles. The results show that the crack ex-tension rate increases with the number of loading points and the singularity value, and the maximum value of the four-point loading speed is about 450 m/s. The number of cracks is only related to the number of loading points and is not related to the location of the loading point. In addition, three loading methods are proposed, and the fastest crack propagation rate is achieved when the azimuthal angle of four-point loading is 0, 150, 180, and 330, respectively. These findings may serve as a theoretical foundation for studying shell crushing.

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Effects of Particle Breakage on the Mechanical Behavior of Calcareous Sand Under Confined Compression Tests

Luo,

Liu,

Zhong

et al. 2024

Int J Civ Eng

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Numerical simulation study on particle breakage behavior of granular materials in confined compression tests

Cited by 7 publications

References 50 publications

Study on the macro–micro evolution of compaction characteristics of coal gangue with different grain sizes under side-limit compression conditions

Study on the macro–micro evolution of compaction characteristics of coal gangue with different grain sizes under side-limit compression conditions

FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings

Effects of Particle Breakage on the Mechanical Behavior of Calcareous Sand Under Confined Compression Tests

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