Investigation on Fracture Mode and Initiation Mechanisms of Cracks in Sandstone Disk Containing a Preexisting Flaw

Determination of the fracture mode and the initiation mechanism of cracks emanating from preexisting flaws are of great significance for understanding the failure process of rocks. In this research, Brazilian tests were conducted on sandstone disc-shaped specimens containing a single preexisting flaw with different inclination angles, and the development process of cracks was captured by a high-speed image-capture system. To accurately determine...