基于微米力学实验的页岩I型断裂韧度表征 1)
韩强***2)(),屈展***,叶正寅**,董广建††
STUDY ON FRACTURE TOUGHNESS OF MODE I OF SHALE BASED ON MICRO-MECHANICAL TEST 1)
Han Qiang***2)(),Qu zhan***,Ye Zhengyin**,Dong Guangjian††

图3. 玻氏压头产生径向裂纹示意图

Fig. 3. Schematic diagram of radial crack with Berkovich indenter