Experimental and numerical study on the facture behavior of heated-granite subjected to high-voltage electric pulse

Yin, Tubing; Liu, Chenghui; Chen, Yongjun; Zhuang, Dengdeng; Wu, You; Dai, Hao; Su, Juzhen

doi:10.1016/j.engfracmech.2024.109935

Cited by 3 publications

(1 citation statement)

References 42 publications

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“…Subsequently, the PPD crushing ore test [32] was carried out, and it was found that PPD could significantly reduce the mechanical strength of the ore and improve the grinding efficiency of the ore. Yan [33] studied the critical crushing characteristics and influencing factors of ore particles in regard to PPD, analyzing the transformation of crushing mechanism, discussing the energy conversion efficiency in the process of PPD crushing, and revealing the law of influence of ore particles on PPD crushing. Yin [34] conducted a PPD experiment on the change in peak voltage of the heated granite sheet, using the Particle Flow Code numerical simulation method to simulate the pulse power crushing process of the granite. The PPD-crushing process and crack propagation mode of granite are described.…”

Section: Introductionmentioning

confidence: 99%

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Lin,

Yang,

Liu

et al. 2024

Buildings

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The application of pulse power discharge (PPD) technology in the crushing and dismantling of concrete structures has characteristics related to both green and environmental protection, as well as safety and reliability, with broad application prospects in the construction and municipal engineering fields in dense urban areas. Nevertheless, the research into using this technology to break reinforced concrete (RC) slabs is very limited, while the influence of key parameters on the crushing effect of reinforced concrete slabs is not clear. To solve this problem, a finite element model of an RC slab was established by ABAQUS. The effect of a shock wave generated by PPD on the surrounding concrete was simulated by an explosion-load equivalent, and the development process of concrete crack was simulated by a cohesive force model. Based on the results of the model analysis, the effects of reinforcement spacing, as well as diameter and concrete strength on the crushing effect of RC slabs were investigated. The results show that the increase in reinforcement diameter and the decrease in reinforcement spacing have a significant effect on limiting the development of cracks. According to the development of cracks, they can be divided into three types: edge cracks, cracks between central holes, and cracks between edge holes. The influence of reinforcement spacing and diameter on the first two crack widths is the most obvious. The increase in concrete strength also reduces the width of cracks. Based on the analysis results, the calculation expressions of the crushing effect of the PPD technique on RC slabs were established, which provides theoretical support for the popularization and application of this technique.

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Section: Introductionmentioning

confidence: 99%

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Lin,

Yang,

Liu

et al. 2024

Buildings

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Effect of the electrode spacing on dynamic fracture behavior of red sandstone under high-voltage pulse discharge

Peng,

Yu,

Zhou

et al. 2024

Powder Technology

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Determination of rock damage characteristics after laser irradiation based on computed tomography scanning and the nuclear magnetic resonance technique

Zhou,

Gao,

Liu

et al. 2024

Therm sci

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Efficiently crushing deep hard rock remains a significant engineering challenge. As an innovative rock-breaking technique, laser technology shows considerable promise for applications in deep engineering. Analyzing the damage characteristics of rock after laser irradiation and clarifying the mechanism of laser rock-breaking are crucial for advancing this technology towards practical engineering applications. Taking basalt as a typical representative of deep hard rock, we introduced computed tomography (CT) scanning and nuclear magnetic resonance (NMR) technology to study the internal macro and micro pore characteristics of the rock after laser irradiation with different power. Additionally, we reconstructed the morphology of the laser-drilled holes. The results show that the surface temperature of the rock under laser irradiation generally follows a Gauss?ian distribution, and the penetration depth of the 1250 W laser can reach 41.51 mm after 30 seconds. Laser irradiation affects the microscopic pores of the rock, causing small pores to expand into larger ones as the laser power increases. After laser irradiation, the molten holes can be categorized into drum-shaped and V-shaped zones, and the timely discharge of molten material enhances the efficiency of laser rock-breaking. These findings provide theoretical and technical support for the application of laser rock-breaking technology in the efficient crushing of deep hard rock and resource extraction.

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Experimental and numerical study on the facture behavior of heated-granite subjected to high-voltage electric pulse

Cited by 3 publications

References 42 publications

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Research on the Crushing of Reinforced Concrete Two-Way Slabs by Pulse Power Discharge Technology

Effect of the electrode spacing on dynamic fracture behavior of red sandstone under high-voltage pulse discharge

Determination of rock damage characteristics after laser irradiation based on computed tomography scanning and the nuclear magnetic resonance technique

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