Effects of a single flaw on failure and acoustic emission characteristics around circular opening subjected to biaxial compression DOI
Bing Liu, Yi Liu,

Peiwei Xiao

et al.

Engineering Failure Analysis, Journal Year: 2024, Volume and Issue: unknown, P. 109008 - 109008

Published: Oct. 1, 2024

Language: Английский

Characteristics of crack extension and fracture mechanism of parallel-fissured sandstone DOI Creative Commons

Fengpu Liu,

Baoxin Jia, Zhiyang Zhou

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Abstract It is of great significance to study the fracture mechanism defect-bearing rocks. Through uniaxial compression test and discrete element numerical simulation on fixed inclination parallel-fissured sandstone, mechanical properties, acoustic emission full dynamic time-varying evolution law sandstone with different fissure spacing number are investigated help multi-signal characteristics. The results show that: There an obvious correlation between fissures elastic modulus, no strength. modulus peak prefabricated determines basic aggregation type cracks, mainly affects diversity cracks. Spalling damage occurs at middle position through-bridge shear plate crack both sides specimen. Through-bridge cracks a common in specimens containing parallel fissures, which influence initiation location main specimen, affect overall strength specimen by changing local narrowest width "column" structure. mutual excitation tension each sudden increase shear-tension ratio corresponds macroscopic rupture multifractal dimension describes complexity signals more finely, decrease parameters Δα Δf(α) can be used as short-range prediction signal for occurrence disasters.

Language: Английский

Citations

0
Comparative study of shear performance of fully-grouted and energy-absorbing bolts under varying normal stress during cyclic shear tests DOI
Hanfang Zheng, Yujing Jiang, Sunhao Zhang

et al.

Bulletin of Engineering Geology and the Environment, Journal Year: 2025, Volume and Issue: 84(4)

Published: March 8, 2025

Language: Английский

Citations

0
Study on micro-parameters of parallel bond model based on machine learning algorithm DOI

Xiaotong Du,

Wanrong Liu, Chao Peng

et al.

Computational Particle Mechanics, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Language: Английский

Citations

0
Fracture propagation characteristics and failure mechanisms of parallel-fractured sandstone DOI Creative Commons

Fengpu Liu,

Baoxin Jia, Zhiyang Zhou

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 24, 2025

It is important to study the fracture mechanism of fractured rocks. Uniaxial compression tests and discrete element numerical simulations were conducted on sandstone specimens with fixed dip angles parallel fractures. With help acoustic emission detection technology, effects different spacings number fractures mechanical properties, full dynamic time-varying evolution investigated. The results show that: there an obvious correlation between elastic modulus no strength. There clear relationship spacing, modulus, peak spacing determines basic type crack aggregation, cracks mainly affects diversity aggregation types. Spalling damage occurs at middle position through-bridge shear cracks, plate both sides specimen. Through-bridge are a common in containing fractures, which influence initiation location main specimen, affect overall strength specimen by changing local narrowest width "column" structure. mutual excitation tension each sudden increase shear-tension ratio corresponds macroscopic rupture multifractal parameters can provide more detailed description signal complexity. abrupt changes Δα Δf(α) serve as short-range prediction indicators for disaster occurrences.

Language: Английский

Citations

0
Experimental and simulation study on compressive failure of rock with pre-Y-shaped cracks DOI Creative Commons
Chao Peng,

Xiaotong Du,

Lihua Zhan

et al.

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(11), P. e0312344 - e0312344

Published: Nov. 14, 2024

A large number of joints and fissures are prevalent in the rock mass, which has an important influence on mechanical properties mass. To study failure characteristics Y-cracked rocks, paper analyzes different angles prefabricated rocks strength crack extension evolution through uniaxial compression indoor tests discrete element PFC 2D numerical simulation. The results indicate that stress-strain curves containing cracks exhibit five stages: initial pore-fracture compaction stage, elastic stable development unstable post-peak rupture. peak specimen shows evolutionary process decreasing, then increasing, decreasing with increase Y-shaped angle. sample is mainly caused by shear expansion at tip. Angle directly affect generation new cracks. final result microcrack propagation, convergence penetration to form macroscopic damage zone. Finally, combined simulation, distribution micro-cracks pattern compared analyzed, it found two good agreement, reflects rationality model.

Language: Английский

Citations

3
Effects of a single flaw on failure and acoustic emission characteristics around circular opening subjected to biaxial compression DOI
Bing Liu, Yi Liu,

Peiwei Xiao

et al.

Engineering Failure Analysis, Journal Year: 2024, Volume and Issue: unknown, P. 109008 - 109008

Published: Oct. 1, 2024

Language: Английский

Citations

2