The Effect of Grain Size Heterogeneity on Mechanical and Microcracking Behavior of Pre-heated Lac du Bonnet Granite Using a Grain-Based Model

Hu, Xunjian; Hu, Hai Feng; Xie, Ni; Huang, Yujie; Guo, Panpan; Gong, Xiaonan

doi:10.1007/s00603-023-03381-5

Cited by 14 publications

(2 citation statements)

References 98 publications

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“…Potyondy [6] initially developed a discrete element method (DEM) that incorporates the mesoscale granular morphology of rock formations, aiming to elucidate the tensile-to-compressive strength ratio in rock simulations. This approach has been widely utilized to examine the relationship between rock microstructure and mechanical response, investigating fracture mechanisms across different lithologies and physical scenarios, including thermo-hydro-mechanical coupling [7,8] and hydraulic fracturing [9][10][11]. However, the reliance on basic statistical metrics, mainly the volumetric fractions of minerals and their equivalent grain sizes, limits the model's ability to capture detailed microstructural features, such as mineral interlocking and intergranular bonding, often resulting in simulations that inadequately correlate with empirical observations.…”

Section: Introductionmentioning

confidence: 99%

Meso-mechanical behavior of crystalline rocks: An image-based discrete element method

Pan,

Zhao,

Chen

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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This research examines the meso-mechanical behavior of rock materials under various loading conditions, with a focus on the influence of mesoscale heterogeneity in crystalline rock specimens. Traditional approaches often rely on a limited set of statistical parameters for constructing numerical models, failing to capture the complex mesoscale heterogeneities integral to rock mechanics. To overcome this limitation, the study utilizes an advanced image-processing technique to accurately identify mineralogical features within rock microstructures. The extracted mineralogical data were then integrated into a discrete element method (DEM) model to explore the mesoscale mechanical responses of crystalline rocks. The results of the simulations indicated that mesoscale heterogeneities play a critical role in stress concentration localization, which in turn dictates the direction of fracture propagation and leads to a sophisticated interaction among various fracture pathways.

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Section: Introductionmentioning

confidence: 99%

Meso-mechanical behavior of crystalline rocks: An image-based discrete element method

Pan,

Zhao,

Chen

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The discrete element method (DEM) can effectively solve the large deformation problem. The DEM is widely used in geotechnical engineering [44][45][46][47], which has advantages in simulating the gravels of the column. Liu [48] and Gu [49] used the discrete element method to simulate the stone columns in soft clay.…”

Section: Introductionmentioning

confidence: 99%

A DEM Study on Bearing Behavior of Floating Geosynthetic-Encased Stone Column in Deep Soft Clays

Liu

Guo

et al. 2023

Applied Sciences

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The use of geosynthetic-encased stone columns has been proven to be an economical and effective method for soft soil foundation treatment. This method is widely used in civil engineering projects at home and abroad. When the geosynthetic-encased stone columns are applied to deep soft clays, they are in a floating state. The load-bearing deformation mechanism of geosynthetic-encased stone columns has changed. The interaction between the aggregates, geogrid, and soil is worth studying, especially at the bottom of the column. In this paper, the discrete element method is used to simulate a floating geosynthetic-encased stone column with a 280 mm encasement depth in deep soft clays. The load-bearing deformation characteristics and mesoscopic mechanism of the floating geosynthetic-encased stone column are studied. The results show that there are large vertical and radial stresses in the top region. Moreover, the porosity and sliding fraction of aggregates in this region increase with settlement, and the coordination number decreases with settlement. The vertical and radial stresses of the soil near the column body are not affected much by the column body. When the encasement depth exceeds 280 mm, the bearing capacity of the FGESC does not increase much. The encasement depth controls the failure mode of the floating geosynthetic-encased stone column. As the encasement depth increases, the failure mode of the floating geosynthetic-encased stone column gradually transitions from swelling deformation to penetration failure.

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The Influence of Mechanical Heterogeneity of Grain Boundary on Mechanical and Microcracking Behavior of Granite Under Mode I Loading Using a Grain-Based Model

Hu,

Liao,

et al. 2024

Rock Mech Rock Eng

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The Effect of Grain Size Heterogeneity on Mechanical and Microcracking Behavior of Pre-heated Lac du Bonnet Granite Using a Grain-Based Model

Cited by 14 publications

References 98 publications

Meso-mechanical behavior of crystalline rocks: An image-based discrete element method

Meso-mechanical behavior of crystalline rocks: An image-based discrete element method

A DEM Study on Bearing Behavior of Floating Geosynthetic-Encased Stone Column in Deep Soft Clays

The Influence of Mechanical Heterogeneity of Grain Boundary on Mechanical and Microcracking Behavior of Granite Under Mode I Loading Using a Grain-Based Model

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