Fracture evolution of granite under cyclic thermal shocks: effects of liquid nitrogen cooling on strength, toughness, and acoustic emission characteristics
Xi'an University of Architecture and Technology · Xi'an University of Technology · +2 more institutions
Abstract
• Three different lab tests were conducted on granite subjected to different high-temperature heating and LN 2 cooling cycles. • Explored the evolution of microcracks and macroscopic fractures in granite under different test modes using AE technology. • After approximately nine LN 2 cycles, further increases in damage and cracking are negligible. • The damage induced by LN 2 cold shock can be attached to the microstructure of granite, resulting in higher peak frequencies of AE signals (>700 kHz). Liquid nitrogen (LN 2 )–assisted fracturing has emerged as a promising technique to enhance reservoir permeability and stimulate geothermal energy extraction. This study investigates the progressive degradation of…
Citation impact
- FWCI
- 233.95
- Percentile
- 100%
- References
- 47
Authors
6- LWLinchao Wang
Xi'an University of Architecture and Technology, Xi'an University of Technology
- YXYi XueCorresponding
Xi'an University of Architecture and Technology, Xi'an University of Technology, Henan Polytechnic University
- LZLin ZhuCorresponding
Xi'an University of Architecture and Technology, Xi'an University of Technology
- XCXiaoshan Cao
Xi'an University of Architecture and Technology, Xi'an University of Technology
- XLXue Li
Xi'an University of Architecture and Technology, Xi'an University of Technology
Topics & keywords
- Acoustic emission
- Brittleness
- Cracking
- Fracture (geology)
- Microstructure
- Liquid nitrogen
- Thermal shock
- Ultimate tensile strength