Experimental study on fracture properties of heat-treated granite in I-II mixed mode suffered from water and liquid nitrogen cooling methods

被引:0
作者
Li, Yao [1 ]
Zhou, Lei [1 ]
Xiao, Xiaodong [1 ]
Liang, Xian [1 ]
Wang, Haohan [1 ]
Zhang, Hongdan [1 ]
Liu, Bang [2 ]
机构
[1] Sichuan Univ, Coll Architecture & Environm, State Key Lab Intelligent Construct & Hlth Operat, Chengdu 610065, Peoples R China
[2] Yibin Univ, Sch Phys & Elect Engn, Yibin 644000, Peoples R China
基金
中国国家自然科学基金;
关键词
High temperature; Water cooling; I/II mixed mode; Fracture toughness; LN2; cooling; DISK-TYPE SPECIMENS; TOUGHNESS; TEMPERATURE; PRESSURE; SHALE; ROCK;
D O I
10.1016/j.engfracmech.2024.110570
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Hot dry rock (HDR) development is significant for solving energy problems and realizing energy conservation and emission reduction. Liquid nitrogen (LN2) fracturing and hydraulic fracturing can form cracks in the HDR and improve the efficiency of geothermal energy mining. Therefore, it is necessary to study the fracture characteristics of high-temperature granite under different cooling methods. In this study, the deterioration of the physical and mechanical properties of granite subjected to high-temperature treatment under water cooling and LN2 cooling was studied. Two I/II mixed modes (tensile orientation mode and shear orientation mode) and a pure II mode fracture characteristics of cracked straight-through Brazilian disc (CSTBD) specimens made of granite were explored. The displacement and strain fields of cracked granite specimens were measured by using a digital image correlation (DIC) method. The results show that when the temperature is 25 degrees C, 200 degrees C, and 400 degrees C, the loading angle and cooling method have a great influence on the fracture mechanical characteristics of the granite. In general, the increase of loading angle and LN2 cooling will lead to the decrease of peak load. For example, at 200 degrees C, /1 = 15 degrees, the deterioration degree of water-cooled and LN2-cooled specimens is 13.77% and 16.69%, respectively. When /1 = 23 degrees, it increases to 14.62 % and 19.91 %, respectively. At the same time, an interesting phenomenon was found in the study. At 400 degrees C, due to the Leidenfrost effect, the peak load of LN2-cooled specimens was higher than that of water-cooled specimens, and the further increase of temperature weakened the effect. When the temperature is 600 degrees C, the difference between the loading angle and the cooling method is weakened.
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页数:21
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共 63 条
[1]   Experimental evaluation of liquid nitrogen fracturing on the development of tight gas carbonate rocks in the Lower Indus Basin, Pakistan [J].
Ali, Muhammad ;
Shar, Abdul Majeed ;
Mahesar, Aftab Ahmed ;
Al-Yaseri, Ahmed ;
Yekeen, Nurudeen ;
Memon, Khalil Rehman ;
Keshavarz, Alireza ;
Hoteit, Hussein .
FUEL, 2022, 309
[2]   Experimental observations on the effect of thermal treatment on the crack speed and mode I and II fracture toughness in brittle and ductile rocks [J].
Alneasan, Mahmoud ;
Alzo'ubi, Abdel Kareem ;
Behnia, Mahmoud ;
Mughieda, Omer .
THEORETICAL AND APPLIED FRACTURE MECHANICS, 2022, 121
[3]   Effect of mineral admixtures on the mixed-mode (I/II) fracture characterization of cement mortar: CTS, CSTBD and SCB specimens [J].
Azar, Hadi Fathipour ;
Choupani, Naghdali ;
Afshin, Hassan ;
Moghadam, Rasoul Hamidzadeh .
ENGINEERING FRACTURE MECHANICS, 2015, 134 :20-34
[4]   Experimental study on the breakdown mechanism of high temperature granite induced by liquid nitrogen fracturing: An implication to geothermal reservoirs [J].
Cai, Chengzheng ;
Zou, Zengxin ;
Ren, Keda ;
Tao, Zhixiang ;
Feng, Yinrong ;
Yang, Yugui ;
Wang, Bo .
HELIYON, 2023, 9 (08)
[5]   Fracture behavior of high-temperature granite subjected to liquid nitrogen cooling: Semi-circular bending test and crack evolution analysis [J].
Chen, Cancan ;
Chu, Peng ;
Xie, Heping ;
Li, Minghui ;
Li, Cunbao ;
Shang, Delei .
THEORETICAL AND APPLIED FRACTURE MECHANICS, 2023, 128
[6]   Fracture behavior and fracture surface roughness of high-temperature granite subjected to liquid nitrogen and water cooling [J].
Chu, Peng ;
Xie, Heping ;
Chen, Cancan ;
Li, Cunbao ;
Li, Minghui ;
Shang, Delei .
ENGINEERING FRACTURE MECHANICS, 2024, 300
[7]   Thermo-mechanical properties of Indian and other granites [J].
Dwivedi, R. D. ;
Goel, R. K. ;
Prasad, V. V. R. ;
Sinha, Amalendu .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2008, 45 (03) :303-315
[8]   Investigation of three different cooling treatments on dynamic mechanical properties and fragmentation characteristics of granite subjected to thermal cycling [J].
Fan, Lifeng ;
Li, Han ;
Xi, Yan .
UNDERGROUND SPACE, 2022, 7 (05) :847-861
[9]   Effect of thermal cycling-dependent cracks on physical and mechanical properties of granite for enhanced geothermal system [J].
Feng, Gan ;
Wang, Xiaochuan ;
Kang, Yong ;
Zhang, Zetian .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2020, 134
[10]   Combined effects of increasing temperature and confining pressure on the fracture toughness of clay bearing rocks [J].
Funatsu, T ;
Seto, M ;
Shimada, H ;
Matsui, K ;
Kuruppu, M .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2004, 41 (06) :927-938