Experimental research of fracture damage behavior of loess with different prefabricated cracks

被引：9

作者：

Duan, Zhao ^{[1
,2
]}

Dong, Chenxi ^{[1
,2
]}

Yan, Xusheng ^{[1
,2
,3
]}

Sun, Qiang ^{[1
]}

Li, Bin ^{[4
]}

机构：

[1] Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Peoples R China

[2] Xian Univ Sci & Technol, Inst Ecol Environm Restorat Mine Areas West China, Xian 710054, Peoples R China

[3] Tongji Univ, Key Lab Geotech & Underground Engn, Minist Educ, Shanghai 200092, Peoples R China

[4] Qinghai Prov Third Nonferrous Geol Explorat Inst, Xining 810000, Qinghai, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2022年 / 275卷

基金：

中国博士后科学基金;

关键词：

Loess; Fracture toughness; Fracture damage; Crack evolution; Acoustic emission; TOUGHNESS; IDENTIFICATION; LANDSLIDES; THICKNESS; MECHANISM;

D O I：

10.1016/j.engfracmech.2022.108849

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Fracture damage in loess poses a significant threat to the safety of loess-based infrastructure in the China Loess Region. To investigate the fracture damage behavior of loess, three-point bending tests were performed on semi-circular loess specimens containing cracks prefabricated at four angles relative to the loading direction. High-speed photography and acoustic emission moni-toring were used to record the fracture damage process. Mechanical strength, crack evolution and acoustics emission signals were investigated in relation to prefabricated crack angles. Based on the results, a fracture damage mechanism for loess was obtained. This paper provides an in-depth understanding of the fracture damage behavior of loess, and a meaningful reference for the prevention and control of geo-crises caused by cracking.

引用

页数：13

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