A new discrete element model for rock-like materials

Zhao, Hongwei; Zhang, Liangchi; Wu, Zhonghuai; Liu, Ang

doi:10.1016/j.compstruc.2021.106730

Cited by 8 publications

(2 citation statements)

References 63 publications

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“…Yu [29] used a double-phase-field method to make a model with mixed cracks in rock-like brittle materials under compressive stresses. Zhao [30] established a new discrete element model for rock-like materials. Deng [31] explored the internal relationship between pore structure and mechanical properties of sandstone-like materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Sandstone-like Material for Damaged Rock Mass Based on Orthogonal Experimental Method

Wang,

Xie,

Song

et al. 2024

Buildings

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The investigation of the mechanical properties of rock mass can be effectively carried out through rock-like material experiments. In this study, polystyrene foam particles were utilized as a novel material for simulating initial damage within rocks. Our research involved the development of sandstone-like materials with comparable mechanical properties to actual sandstone. These materials were then subjected to orthogonal mechanical tests, allowing us to identify the key factors that have a substantial impact on the mechanical parameters of sandstone-like rocks. The influencing factors considered in the orthogonal mechanical tests were the proportion of aggregate and binder, the proportion of polystyrene foam in the entire model, the proportion of binder and regulator, and the size of polystyrene foam. Five levels were set for each factor, and mechanical parameters such as compressive strength, tensile strength, elastic modulus, axial strain, and Poisson’s ratio were tested for each group of samples. The changes in mechanical parameters with the levels of the above four factors were studied. The study found that modifying the proportion of aggregate to binder can alter the elastic modulus, tensile strength, and compressive strength values of sandstone-like material. The size of polystyrene foam can be modified to alter the axial strain values of sandstone-like materials. Additionally, adjusting the ratio of binder and regulator can modify the value of Poisson’s ratio. The comparison of mechanical parameters between sandstone-like samples and sandstone reveals that sandstone-like materials can better simulate the deformation and failure mechanisms of sandstone. The error in the main mechanical parameters, such as modulus of elasticity, strength, and Poisson’s ratio, is less than 7%, indicating a greater resemblance between sandstone-like materials and sandstone. Therefore, sandstone-like materials can be used to investigate the deformation law, damage evolution law, and failure mechanism of sandstone. This can help alleviate the difficulty of obtaining specimens of deep damaged rock and the high cost of testing.

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Section: Introductionmentioning

confidence: 99%

Investigation of Sandstone-like Material for Damaged Rock Mass Based on Orthogonal Experimental Method

Wang,

Xie,

Song

et al. 2024

Buildings

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“…Yu [29] made model with Mixed Cracks in Rock-Like Brittle Materials Under Compressive Stresses by a Double-Phase-Field Method. Zhao [30] established a new discrete element model for rock-like materials.…”

mentioning

confidence: 99%

Investigation of Rock-like Material for Deep Damaged Rock Mass Based on Orthogonal Experimental Method

Wang¹,

Xie²,

Song³

et al. 2023

Preprint

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The study of mechanical properties of rock mass can be effectively carried out through rock-like material model test. The similarity of mechanical properties between rock-like material and protolith is dependent on the appropriate selection of composition and content of rock-like materials. In this research, X-Ray diffraction test was conducted to analyze the composition of deep rock, which confirmed silica, quartz, and dolomite as the primary components of deep sandstone. An orthogonal design test was used to execute the ratio test of rock-like material. River sand was used as an aggregate, cement as a binder, gypsum powder as a regulator, and polystyrene foam (EPS) as rock damage simulation material. The influencing factors considered in the orthogonal mechanical tests were the proportion of aggregate and binder, ratio of binder and regulator, quantity of damage simulation material, and size of damage simulation material. Three levels were set for each factor, and mechanical parameters such as compressive strength, tensile strength, elastic modulus, axial strain, and Poisson's ratio were tested for each group of samples. The changes of those parameters with the levels of the above four factors were studied. The study revealed that adjusting the size of polystyrene foam (EPS) can adjust the values of elastic modulus, tensile strength, and Poisson's ratio of rock-like material. Similarly, changing the ratio of binder and regulator can adjust the values of axial strain and compressive strength of rock-like material. The rock-like material developed in the study can simulate the mechanical properties of different rock masses such as granite, sandstone, shale, and limestone.

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Effects of Crack Properties on Coal Strength and Failure Mode: A Simulation Study

et al. 2023

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A new discrete element model for rock-like materials

Cited by 8 publications

References 63 publications

Investigation of Sandstone-like Material for Damaged Rock Mass Based on Orthogonal Experimental Method

Investigation of Sandstone-like Material for Damaged Rock Mass Based on Orthogonal Experimental Method

Investigation of Rock-like Material for Deep Damaged Rock Mass Based on Orthogonal Experimental Method

Effects of Crack Properties on Coal Strength and Failure Mode: A Simulation Study

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