单轴压缩下基于全局应变场分析的岩石裂纹扩展及其损伤演化特性研究

Based on the self-developed digital image analysis software and the digital image correlation method, the deformation and failure characteristics of rock-like materials with pre-existing single flaw is experimentally studied under uniaxial compression. The law of crack initiation and propagation and the evolution properties of rock damage are analyzed and summed up quantitatively on meso-level from the perspective of the global strain field on the surface of specimen. Besides, FRANC2D/L, a fructure analysis software, is applied on a numerical model corresponding to the experimental specimen to simulate the path of crack growth and the corresponding distribution of stress field at different stages in the whole process of loading. Combining the results of experiment and simulation, the inner link between microscopic mechanical mechanism and macroscopic mechanical response of flawed rock is discussed, which provides a deeper understanding to the disaster mechanism of jointed rock mass engineering.