Progressive Failure Process of Sandstone Under Different Loading Conditions via Acoustic Emission Characteristics

被引：0

作者：

Lyu, Juanxia ^{[1
]}

Fan, Caiyuan ^{[2
]}

Li, Shijie ^{[1
]}

Huang, Zhen ^{[3
]}

机构：

[1] Sun Yat sen Univ, Sch Earth Sci & Engn, Zhuhai, Peoples R China

[2] PSL Univ, Ecole normale Super, Lab geol, CNRS,UMR 8538, Paris, France

[3] Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou, Peoples R China

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2025年 / 48卷 / 06期

基金：

中国国家自然科学基金;

关键词：

acoustic emission; AE energy; RA-AF analysis; shear crack; tensile crack; CRACK CLASSIFICATION; FRACTURING PROCESS; CONCRETE; ENERGY; ROCKS; COMPRESSION; DEFORMATION; SIMULATION; GRANITE; EVENTS;

D O I：

10.1111/ffe.14621

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This study investigates the acoustic emission (AE) characteristics during sandstone failure under three typical mechanical tests:direct shear test (DST), Brazilian splitting test (BST), and uniaxial compression test (UCT). Results show a significant difference in the log-linear slope between AE count and amplitude across different tests, reflecting variations in the scaling distribution characteristics of AE signals. Peak frequency distributions vary, with DST predominantly in the 150- to 200-kHz range, BST in the 0- to 100-kHz range, and UCT showing a mixed distribution. RA (rise time/amplitude) and AF (counts/duration) analysis classified crack types, indicating shear-type signals dominate in DST, tensile-type signals in BST, and a slight dominance of tensile cracks in UCT. Shear cracks generally exhibit higher AE energy, especially in high-energy ranges (10-1000 mV*mS), whereas tensile cracks dominate the low-energy range (0.1-1 mV*mS). These findings advance the understanding of rock failure mechanisms and AE signal behavior.

引用

页码：2540 / 2556

页数：17

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