A experimental study of Ⅰ-Ⅱ-Ⅲ mixed mode crack fracture of rock under different temperature
A series of critical fracture toughness of two kinds of rock materials under different temperature which varied from-50℃ to 240 ℃ are measured by I-II-III mixed mode fracture experiments adopting atypical three point bending specimens.Relative stress intensity factors of crack initiation are calculated by finite element method.Combining with calculated values,the experiment result shows that,the mixed mode fracture toughness of the rocks decreases with the increase of temperature.The experimental and calculated results can be used in the design of deep underground engineering and disaster prevention and mitigation engineering.
rock crack fracture Ⅰ-Ⅱ-Ⅲ mixed mode temperature experiments finite element method
LI Li-yun XU Zhi-qiang LI Ming-xiu LIU Yi FAN Chen TANG Tie-Wu LIU Da-an
China University of Mining and Technology,Beijing 100083,China Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,China
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）