College of Science, Wuhan University of Technology, Wuhan 430070, Hubei, China;
2.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China
The dynamic response and failure behavior of AOW rock subjected to tensile loads has been studied experimentally. With the help of an one-stage light gas gun, the AOW rock samples, which were subjected to the plane plate impact by PMMA flyer with different speeds, have been recovered. The impact generated a tensile stress pulse of about 1.5 s duration in AOW rock by superposing rarefaction waves to induce spall. Based on the analyses of macro-and micro-examination for the recovered samples, the dynamic tensile strength of AOW rock was determined as 265.2-314.7 MPa.