Failure of rock under dynamic compressive loading

来源期刊：中南大学学报(英文版)2008年第3期

论文作者：周子龙 李地元 马国伟 李建春

文章页码：339 - 343

Key words：Split Hopkinson Pressure Bar(SHPB) test; failure mechanism; dynamic compressive loading; crack propagation; damage evolution

Abstract: Split Hopkinson Pressure Bar(SHPB) test was simulated to investigate the distribution of the first principal stress and damage zone of specimen subjected to dynamic compressive load. Numerical models of plate-type specimen containing cracks with inclined angles of 0°, 45° and 90° were also established to investigate the crack propagation and damage evolution under dynamic loading. The results show that the simulation results are in accordance with the failure patterns of specimens in experimental test. The interactions between stress wave and crack with different inclined angles are different; damage usually appears around the crack tips firstly; and then more damage zones develop away from the foregoing damage zone after a period of energy accumulation; eventually, the damage zones run through the specimen in the direction of applied loading and split the specimen into pieces.

基金信息：the National Natural Science Foundation of China
the Provincial Natural Science Foundation of Hunan, China