Deformation of Rock Material Target under High Velocity Impact

Porosity and water content are typical properties that have a significant influence on the macroscopic dynamic behavior of rock materials, which further on affect the cratering behavior under high velocity impact.This paper was focused on the impact cratering morphology and studied the characteristics of dry and wet rock materials by conducting numerical and the high velocity impact experiments.Based on the hypervelocity fragment acceleration platform, experimental studies on the impact cratering of rock materials were performed using numerical simulation, and comparative analysis of the cratering effect, cratering morphology and characteristics of the dry and wet rocks was presented.The results indicate that, in high-velocity cratering, the target of dry sandstone leads to smaller crater sizes compared with those of the water-saturated target.The transient crater reaches a larger diameter in the water saturated sandstone.The water within the pore space reduces the porosity and counteracts this process, which influences the impact cratering of rock materials.