期刊
ENGINEERING FRACTURE MECHANICS
卷 275, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2022.108849
关键词
Loess; Fracture toughness; Fracture damage; Crack evolution; Acoustic emission
类别
资金
- Natural Science Foundation of China
- China Postdoctoral Science Foundation
- [42177155]
- [41790442]
- [41972288]
- [2020M683676XB]
This study investigates the fracture damage behavior of loess using three-point bending tests and explores the relationship between crack angles and mechanical strength, crack evolution, and acoustic emission signals. The results provide an in-depth understanding of the fracture damage mechanism of loess.
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.
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