Particle Flow Simulation of the Strength and Failure Characteristics of a Layered Composite Rock-Like Sample with a Single Hole

Wang, Guozhu; Wang, Yu; Song, Lei; Shi, Hao; Zhang, Mingwei; Yuan, Guotao; Xu, Qiangguo; Zhang, Weiqian; Gao, J. Y.

doi:10.3390/sym13071132

Cited by 5 publications

(4 citation statements)

References 35 publications

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“…Wang [26] investigated the mechanical properties and failure mechanism of rock-like specimens. Wang [27] investigated the strength and failure characteristics of a layered composite rock-like sample with a single hole. Wang [28] used the phase-field method to make a model with damage and cracking in heterogeneous rock-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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“…This information is subsequently utilized to analyze further the impact of joint inclination on the composite specimens [7][8][9][10]. With the advancement of numerical simulation software such as PFC, Wang et al [11] and Chen et al [12] have analyzed layered rock masses by incorporating numerical models to investigate the failure processes of specimens through the evolution of microcracks. Consistent with experimental observations, they also discovered that the strength of the specimens initially decreases and then increases with an increase in joint inclination.…”

Section: Introductionmentioning

confidence: 99%

Compression Mechanical Properties and Constitutive Model for Soft–Hard Interlayered Rock Mass

Li,

Yang,

Wang

et al. 2024

Advances in Civil Engineering

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The properties of soft–hard interbedded rock masses are significantly impacted by the strength of rock layers and the characteristics of interface surfaces. This study investigates the mechanical properties of soft–hard interlayered rock masses by preparing rock-like specimens with different interface angles. Uniaxial and triaxial compression tests were conducted to examine the compression mechanical characteristics of the specimens. Experimental results demonstrated that in the uniaxial compression tests, the peak strength of the two-layer rock-like specimen exhibits an initial decrease followed by an increase as the interface angle increases. Similarly, the peak strength of the three-layer rock-like specimen also follows a “U-shaped” pattern. The failure of both specimens shifts from tensile failure to shear failure. In the triaxial tests, the strength of the two-layer rock-like specimen initially increases and subsequently decreases as the interface angle increases. In contrast, the intensity of the three-layer rock-like specimen exhibits a decreasing trend, transitioning from shear dilation or tensile failure to shear failure. By utilizing the damage constitutive model to compute the compressive strength of the composite specimen, it was observed that the deviation from the experimental value did not exceed 2.5%, and the overall shape of the curves was in good agreement. Consequently, it is affirmed that the damage constitutive model developed in this study can accurately capture the pre-peak phase of the stress–strain relationship in soft–hard interlayered rock-like specimens, thus providing a valid representation of their mechanical behavior.

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“…Wang studied the effect of interlayer thickness and strength on mechanical behavior and failure processes of layered rock mass with holes through uniaxial compression experiments. They found interlayer thickness and strength would lead the change of peak strength and elastic modulus of rock mass 17 . Liu conducted true triaxial compression experiments on two types of foliation orientation according to the large anisotropic deformation caused by the change of original rock stress state.…”

Section: Introductionmentioning

confidence: 99%

Frequency response characteristics and failure model of single-layered thin plate rock mass under dynamic loading

Wang

Sun

et al. 2022

Sci Rep

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In underground engineering, disturbance of dynamic load can change layered rock mass stress state and induce accidents. Traditional elastic mechanics can’t effectively solve the complex deformation problem. However, Hamiltonian mechanics system can overcome this problem. Dual variables are introduced in symplectic space to solve the deflection equations of single-layered thin plate rock mass. Comparing vibration parameters, it’s found the 1st, 5th and 6th order are effective vibration modes. The resonance characteristics of thin plate are obtained with three dynamic loads. It’s found the thin plate is most likely to resonate and damage due to the smallest resonance frequency interval and the largest vibration amplitude by impact wave and rectangular wave respectively. Then, the vibration mode of multi-layered rock mass is analyzed through Multiple Reference Impact Testing. The failure of fine sandstone is caused by the resonance of effective vibration modes by hammer excitation. Finally, the failure mechanism of thin plate is obtained by the failure theory and LS-DYNA. It’s found the four sides and corners suffer tensile shear failure and shear failure respectively. When tensile failure occurs in central, the main crack and secondary crack propagate along long axis and short axis to form “O-十” failure mode.

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Particle Flow Simulation of the Strength and Failure Characteristics of a Layered Composite Rock-Like Sample with a Single Hole

Cited by 5 publications

References 35 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

Compression Mechanical Properties and Constitutive Model for Soft–Hard Interlayered Rock Mass

Frequency response characteristics and failure model of single-layered thin plate rock mass under dynamic loading

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