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Particle flow simulation of crack propagation and penetration in Brazilian disc under uniaxial compression Particle flow simulation of crack propagation and penetration in Brazilian disc under uniaxial compression
Open Access Research Article

Particle flow simulation of crack propagation and penetration in Brazilian disc under uniaxial compression

by Zhenyu Zhu 1 ,  Hesi Xu 1 ,  Shuyang Yu 1,* ,  Jun Yu 1  and  Bei Zhang 2
1
School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China
2
School of Civil Engineering, Nantong Vocational University, Nantong 226007, China
*
Author to whom correspondence should be addressed.
RML  2025 2(1):7; https://doi.org/10.70425/rml.202501.7
Received: 27 September 2024 / Accepted: 12 October 2024 / Published Online: 20 October 2024
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Abstract

The presence of rock mass fractures has always been a subject of study for the prevention and control of related natural disasters. To understand the effects of different dip angles and horizontal distances on crack development, numerical simulation experiments on Brazilian disks under uniaxial compression were con-ducted using the PFC2D particle flow program. A function module was utilized to monitor the expansion and quantity of cracks. The numerical simulation results under 0° conditions were in good agreement with the experimental results, validating the rationality of the numerical simulation. The simulation results indicate that: under single fracture conditions with different dip angles, samples with angles between 30° and 60° produced typical wing-shaped cracks. At 0°, cracks propagat-ed through the center of the fracture, while at 90°, cracks initiated from the tip of the fracture and propagated through the sample. The peak stress and the number of cracks in the samples first decreased and then increased with the increase of the dip angle, reaching a maximum at 90°. For samples with double fractures and varying horizontal distances, all produced wing-shaped cracks. Their peak stress and the number of cracks increased monotonically with the increase in distance, reaching a maximum at a distance of 30mm. The experimental results confirmed that the PFC2D program can effectively simulate the process of crack initiation and development, and the research findings provide a reference for correctly understanding the fracture mechanics of fractured rock masses.

Keywords: fractured rock mass ; brazilian disk ; uniaxial compression ; crack propagation ; particle flow method;
Copyright: © 2024 by Zhu, Xu, Yu, Yu and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (Creative Commons Attribution 4.0 International License). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
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ACS Style
Zhu, Z.; Xu, H.; Yu, S.; Yu, J.; Zhang, B. Particle flow simulation of crack propagation and penetration in Brazilian disc under uniaxial compression. Rock Mechanics Letters, 2025, 2, 7. doi:10.70425/rml.202501.7
AMA Style
Zhu Z, Xu H, Yu S et al.. Particle flow simulation of crack propagation and penetration in Brazilian disc under uniaxial compression. Rock Mechanics Letters; 2025, 2(1):7. doi:10.70425/rml.202501.7
Chicago/Turabian Style
Zhu, Zhenyu; Xu, Hesi; Yu, Shuyang; Yu, Jun; Zhang, Bei 2025. "Particle flow simulation of crack propagation and penetration in Brazilian disc under uniaxial compression" Rock Mechanics Letters 2, no.1:7. doi:10.70425/rml.202501.7
APA Style
Zhu, Z., Xu, H., Yu, S., Yu, J., & Zhang, B. (2025). Particle flow simulation of crack propagation and penetration in Brazilian disc under uniaxial compression. Rock Mechanics Letters, 2(1), 7. doi:10.70425/rml.202501.7

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