Research on micro-meso characteristics of granite fracture under uniaxial compression at low and intermediate strain rates

被引：0

作者：

Key Laboratory of Neotectonics Movement and Geohazards, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing ^{[1
]}

100081, China

不详 ^{[2
]}

100081, China

不详 ^{[3
]}

100029, China

机构：

[1] Key Laboratory of Neotectonics Movement and Geohazards, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing

[2] Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing

[3] Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing

来源：

Yanshilixue Yu Gongcheng Xuebao | / 2977-2986期

关键词：

Fractography; Fractured modes; Micro-meso mechanism; Rock mechanics; Strain rate;

D O I：

10.13722/j.cnki.jrme.2014.0701

中图分类号：

学科分类号：

摘要：

The macroscopic fracture modes and the micro-meso morphology are the important characteristics to represent rock failure mechanism. The shear failure mode is the main macro fracture mode of the granite under low and intermediate strain rates. The mesoscopic morphology was studied using scanning electron microscope(SEM) and 3D laser scanner, and the roughness of the fractured surface was quantitatively studied based on fractal theory. The research results show that with increasing strain rates, the main fracture modes change from intergranular fracture, intergranular fracture and cleavage fracture, transgranular with curved path to transgranular with straight path. Based on the research results of micro-meso fracture modes, it has been concluded that the difference of strain rates leads to the difference of energy absorption and the differences of the fracture morphology of rock, which finally leads to the rate sensitivity of rock strength. ©, 2015, Academia Sinica. All right reserved.

引用

页码：2977 / 2986

页数：9

共 25 条

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