Abstract
We have studied the effects of target material properties on diameter growth of crater cavity by using the laser method. In our previous studies, we found that (1) the increase rate in the diameter growth follows a power-law relation at early times during the excavation process, but the increase rate at late stages deviates from the power-law relation; (2) the power-law exponent and the degree of deviation from the power-law depends on target materials. In this study, we discuss how the power-law exponent and the degree of deviation depend on target properties. We did impact experiments for water targets as well as soda-lime glass spheres with various grain sizes and dry sand, and determined the power-law exponent and the degree of deviation for these targets. Based on these results, we discuss the effects of target material properties on a scaling relation of impact cratering in the gravity regime.
