围压下的泥岩断裂韧性测试*

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Abstract On the basis of fracture mechanics under confining pressures，the fracture toughness measurement of artificial shale with various proportion of soil content，is conducted under different confining pressures. After calculation of toughness values with help of commercial software package ANSYS55，the statistic linear relationships among toughness，confining pressures and soil contents of them are regressed，and a reliable means of specifying toughness for hydraulic fracturing simulation，is obtained，so that the design and prediction can be made with satisfactory accuracy.

Key words： fracture toughness confining pressure soil contents

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https://rockmech.whrsm.ac.cn/EN/Y2002/V21/IS/2030