Acoustic emission and fracture characteristics of red sandstone after high-temperature treatment

被引：9

作者：

Wang, Mengxiang ^{[1
]}

Li, Jiangteng ^{[1
]}

Shi, Zhanming ^{[1
,2
]}

Tan, Han ^{[1
]}

Wang, Ju ^{[3
]}

Li, Kaihui ^{[1
]}

机构：

[1] Cent South Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China

[2] Monash Univ, Dept Civil Engn, Melbourne 3800, Australia

[3] Sichuan Univ, Coll Water Resource & Hydropower, Chengdu 610065, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2024年 / 306卷

基金：

中国国家自然科学基金;

关键词：

High temperature; Cyclic load; Acoustic emission; Crack classification model; Critical slowing down; MECHANICAL-BEHAVIOR; ROCK; COMPRESSION; FAILURE;

D O I：

10.1016/j.engfracmech.2024.110245

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper investigated red sandstone's acoustic emission (AE) and fracture characteristics under high temperature and cyclic load. The specimen's behavior throughout the process from stabilization to failure was systematically analyzed in terms of the distribution of AE activities, rupture scale, crack type, crack evolution, and failure mode. A crack classification model based on Kmedoids and support vector machine (SVM) algorithms was proposed, and the optimal dividing line for tensile-shear cracks at different temperatures was determined as AF = 0.335 x RA + 76.890. The specimen's failure precursor information was recognized based on the critical slowing down theory.

引用

页数：29

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