摘要
用花岗岩试件做了常规三轴压缩试验,对在不同围压作用下的岩石断裂表面进行了分形研究。其结果表明,随着围压的增加,沿破坏而剪切错动方向分形维数增加,而垂直于该方向的分形维数则基本不变。用光学显微镜及扫描电镜观察岩石断口的分形特征,分析了岩石断裂机理。结果表明,分形维数是一个能反映岩石损伤断裂机理的特征参数。
Conventional triaxial compression tests of granite were made and the fracture surfaces of samples tested under different confining pressures were studied by fractal analysis. The results show that the fractal dimension parallel to the direction of shear displacement increases with increasing confining pressure whereas the fractal dimension perpendicular to that direction is almost invariant. Fractographic study of the granite tested was carried out using scanning electron microscope and optical microseope. The result of this study shows that the fractal dimension of fracture surfaces is a characteristic parameter capable of reflecting the damage-fracture mechanism of rocks.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
1992年第3期295-303,共9页
Chinese Journal of Rock Mechanics and Engineering
关键词
三轴压缩
花岗岩
断裂
表面
分形
triaxial compression, fractographic study of granite, fractal dimension
