Numerical Simulation Analysis of Fracture Propagation in Rock Based on Smooth Particle Hydrodynamics

Ren, Xuhua; Zhang, Hui; Zhang, Jixun; Yu, Shuyang; Maimaitiyusupu, Semaierjiang

doi:10.3390/ma16196560

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…This limited penetration was likely due to the protective cement grouting applied to the F2 rock body, preventing full contact with the epoxy grout during the cement grouting process, thus impeding the epoxy grout's penetration. To determine the epoxy grouting material with optimal strength enhancement for the faulted rock body of the Yebatan Hydropower Station, it is imperative to conduct strength testing experiments on the samples [27][28][29]. The effect of HK-G (9:1) epoxy grouting material on F2 rock penetration was not obvious in the rock penetration experiments, so the viscosity of HK-G epoxy was reduced in the experiments.…”

Section: Methodsmentioning

confidence: 99%

Pressureless Immersion of Epoxy Resin-Filled Cracks in Faulted Rock Materials

Yu,

She,

Chen

et al. 2024

Materials

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Epoxy resin, known for its excellent corrosion resistance, water resistance, and high-temperature resistance, is extensively utilized in construction and water-related projects. Within water conservancy projects, natural factors such as water impact and weathering often result in cracks within rock formations. Consequently, the application of epoxy resin materials for repair and reinforcement has emerged as a common solution. This research investigates the impact of five epoxy grouting materials, YDS (100:6.4), RH-1 (6.1:1), PSI (9:1), TK (100:8), and HK-G (5:1), on the repair and reinforcement of faulted rock at the Yebatan Hydropower Station. Penetration experiments were conducted on rock samples, and the strength of the epoxy grout samples was tested under ambient conditions of 20 °C, 15 °C, and 0 °C. The experimental results indicate that all five epoxy grout materials successfully penetrated the faulted rock samples. Among them, the PSI (9:1) epoxy grouting material exhibited the most exceptional reinforcing effect across different temperatures, with grouting samples demonstrating strengths in the range of 20 to 25 MPa. This paper confirms that epoxy resin effectively repairs and reinforces rock structures, thereby enhancing the safety and durability of water conservancy projects.

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Section: Methodsmentioning

confidence: 99%

Pressureless Immersion of Epoxy Resin-Filled Cracks in Faulted Rock Materials

Yu,

She,

Chen

et al. 2024

Materials

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“…The SPH method is a meshless finite element simulation method, first proposed by Gingold and Monaghan in 1977. It approximates the material properties and state variables as a set of discrete disordered points, which are SPH particles [22] . The interaction relationship between SPH particles is represented by using an interpolation algorithm.…”

Section: Sph Methodsmentioning

confidence: 99%

Study on grinding removal mechanism and subsurface damage of bionic layered graphene ceramic matrix composites

Zhou,

Zou,

Zhang

et al. 2023

Preprint

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Bionic layered graphene ceramic matrix composites have excellent properties of high strength, high toughness and heat resistance, and are important materials for national defense equipment, but they are also typical brittle and difficult-to-machine materials. To achieve high quality and low damage machining of the composite parts, grinding removal mechanism and subsurface damage are investigated in this paper. Firstly, the SPH simulation models for indentation and scratching of a single diamond grain are established. The effect of addition of graphene nanosheets on the crack expansion mechanism and subsurface damage is investigated. Then, the simulation models of different angles of graphene nanosheets are established to analyze the effect of graphene anisotropy on grinding process of composites. Finally, the grinding removal mechanism of the composites is investigated by analysing crack expansion and removal forms of the composites at different scratching velocities and depths. The results show that incorporation of graphene nanosheets can reduce subsurface damage of composites and provide a certain shielding effect on the cracks. The optimal effects for reducing subsurface damage and cracks are obtained when graphene nanosheets angle is 0°. As scratching depth increases, the material removal mode gradually changes from plastic removal to brittle removal, and subsurface damage and crack depths also increases. The increase in scratching velocity leads to a subsequent increase in material strain rate, which inhibits crack generation and reduces subsurface damage depth. The form of material removal and crack generation in scratching experiments is consistent with the simulation analysis when changing the scratching depth. Furthermore, the effect of graphene nanosheets on crack deflection corresponds with the simulation results. This study can provide an important theoretical basis for the grinding process of bionic layered graphene ceramic matrix composite parts.

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“…Although experimental measurement is the ultimate route to determine the microstructure–property relationship, numerical calculation of a material’s properties from the observed microstructure can provide in-depth knowledge about microstructure–property relationships. Examples include the prediction of the fracture behaviours in brittle materials from their known configuration of phases and compositions using numerical calculation [ 2 , 3 ]. Precise interpretation of the observed microstructural pattern is again the key procedure to identify microstructure–property relationships.…”

Section: Introductionmentioning

confidence: 99%

Visual Computation of Material Microstructure and Deformation

Qin

2024

Materials

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The experimentally obtained material microstructure can be used to calculate a material’s properties and identify microstructure–property relationships. The key procedure to enable this is to interpret the observed microstructure accurately. This work reports on a newly developed computational method to serve such a purpose. The method is based on cubic spline interpolation and a simple search algorithm. Parameterisation was accomplished via the comparison between its preliminary statistical results and the information in a phase diagram. The method was applied to analyse the quenched microstructure of multicomponent and multiphase metallic-oxide materials. The importance of adequate parameterisation is demonstrated. The results provide a good explanation for the experimentally measured electric conductance behaviour. Further application of the method to the deformation of materials is discussed. The algorithms are directly available for the analysis of the three-dimensional microstructure of materials.

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Numerical Simulation Analysis of Fracture Propagation in Rock Based on Smooth Particle Hydrodynamics

Cited by 4 publications

References 35 publications

Pressureless Immersion of Epoxy Resin-Filled Cracks in Faulted Rock Materials

Pressureless Immersion of Epoxy Resin-Filled Cracks in Faulted Rock Materials

Study on grinding removal mechanism and subsurface damage of bionic layered graphene ceramic matrix composites

Visual Computation of Material Microstructure and Deformation

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