Mixed-mode I/II fracture properties and failure characteristics of microwave-irradiated basalt: An experimental study

被引：16

作者：

Yang, Zheng ^{[1
]}

Yin, Tubing ^{[1
]}

Wu, You ^{[1
]}

Zhuang, Dengdeng ^{[1
,2
]}

Yin, Jiewen ^{[1
]}

Ma, Jiexin ^{[1
]}

机构：

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

[2] Univ Oulu, Oulu Min Sch, Oulu, Finland

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2023年 / 46卷 / 03期

基金：

中国国家自然科学基金;

关键词：

AE events; equivalent fracture toughness; microwave-assisted rock fragmentation; mixed-mode I-II loading; notched semicircular bending (NSCB) specimen; ENERGY DENSITY CRITERION; RELEASE RATE CRITERION; MECHANICAL-BEHAVIOR; ACOUSTIC-EMISSION; TOUGHNESS; BRITTLE; TEMPERATURE; PROPAGATION; EVOLUTION; SPECIMEN;

D O I：

10.1111/ffe.13897

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The notched semicircular bending samples with different microwave irradiations were subjected to 3-point bending fracture tests under mixed-mode I/II loading to investigate the effects of microwave irradiation on the fracture characteristics of basalt. Influences of the irradiation duration on the temperature, P-wave velocity, and mixed-mode I/II fracture characteristics under 2 kW power were studied. The acoustic emission device was utilized to monitor the acoustic emission signals during the destruction process. The P-wave velocity and equivalent fracture toughness are weakened by microwave irradiation, but the ductility of basalt is enhanced by microwave irradiation. The microscopic characteristics of the treated basalts were observed by scanning electron microscope. Microwave irradiation aggravated the creation and propagation of microcracks and pores. The study of the influence of microwave irradiation on mixed-mode I/II fracture characteristics of rock provides effective theoretical support for microwave-assisted rock fragmentation.

引用

页码：814 / 834

页数：21

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