EXPERIMENTAL RESEARCH ON THE EQUATION OF STATE OF GRANITE AT HIGH PRESSURE

The equation of state and the Hugoniot shock relationship of granite at high pressure were studied by experiments of high- and hyper-velocity flyer impact using a two-stage light gas gun. The average shock wave velocity in the experimental sample was measured by a fiber optic probe. The maximum impact velocity was 4.47 km/s, and the corresponding maximum impact pressure was 42.4 GPa. By fitting the effective experimental results, the Hugoniot linear relationship, Hugoniot parameters C and λ, and polynomial equations of the granite at high pressure were obtained. The results provided a reference for the application of granite in rock blasting, meteorite impact and other fields.