Dynamic strength and crack propagation behavior of marble specimens containing single hole under impact loading

摘要

The dynamic compressive tests were carded out on plate-shape marble specimens with different types of single hole in the central of the specimen by the Split Hopkinson Pressure Bar (SHPB) apparatus.The dynamic crack propagation processes were monitored by using a real-time controlled high speed camera.The dynamic strength and crack propagation characteristics were analyzed and discussed.Meanwhile, a simple and effective method was proposed to measure the average crack propagation velocity of marbles under impact load.The average dynamic crack propagation velocity of the marble specimens ranges in 100-450 m/s at the loading rate of 30-45 s-1.