Effect of particle size distributions on the mechanical behavior and particle breakage of coral sands

Zeng, Kaifeng; Liu, Huitao

doi:10.1007/s10035-023-01334-x

Cited by 2 publications

(2 citation statements)

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“…Instead, we aimed to derive appropriate parameters for analyzing the interaction between particle shape and particle breakage. For this purpose, laboratory triaxial consolidated-drained tests (Zeng and Liu, 2023c) were taken as the benchmark. A comparison between the DEM simulation and the laboratory test results is shown in Figure 5C, and the model parameters of the crushable agglomerates and walls used in this study can be found in Table 2.…”

Section: Model Parameter Determinationmentioning

confidence: 99%

“…research methods for this topic involve element tests and numerical analyses via the discrete element method (DEM). Most of these tests (Lade and Yamamuro, 1996;Luzzani and Coop, 2002;Jia et al, 2017;Wei et al, 2018;Yu, 2018;Liu et al, 2020;Zeng and Liu, 2023c) and simulations (Alaei and Mahboubi, 2012;De Bono and McDowell, 2014;Zhou et al, 2015;Xu et al, 2017;Zhou et al, 2017;Fang et al, 2021; have focused on the influence of particle breakage on mechanical properties. Yu (2017) conducted a series of drained shear tests on coral sand and found that particle breakage resulted in a reduction in the peak friction angle and dilatancy angle.…”

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confidence: 99%

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Study on the interaction between particle shape and particle breakage of coral sand by discrete element method

Liu,

Zeng,

Xiang

et al. 2024

Front. Earth Sci.

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A series of biaxial tests with different initial particle shapes, confining pressures, bond strengths and depositional angles were conducted on coral sand by using a 2D discrete element method simulation. The interactions between particle shape and particle breakage were investigated, and their combined effects on the mechanical behavior of coral sand were analyzed. The test results showed that particle breakage considerably weakens the effect of particle shape and inherent anisotropy on shear strength. The difference between the internal friction angles of unbreakable and breakable agglomerates Δφ decreases with increasing aspect ratio AR, sphericity S, and depositional angle θ. There exists a unique relationship between the relative breakage BrDe and the input energy E for the same agglomerates, which is independent of axial strain and confining pressure. However, this relationship is significantly influenced by the agglomerate shape and depositional angle, and irregular and low depositional angle specimens are more easily broken. In addition, the evolution of the aspect ratio AR and sphericity S of agglomerates was controlled by particle breakage, regardless of the axial strain, confining pressure, bond strength and depositional angle, and these trends were determined by the initial particle shape.

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Section: Model Parameter Determinationmentioning

confidence: 99%