Fig. 4
From: Effect of projectile shape and interior structure on crater size in strength regime
a Surface diameter, Ds, and inner diameter, Di, normalized by Dp. b Crater depth, d, normalized by Dp. In both panels, the horizontal axis is the same, π3−μ/2π4−ν, where μ and ν are set to 0.55 and 0.4, respectively. The previous data of porous gypsum (Yasui et al. 2012) and basalt (Dohi et al. 2012) with nylon projectiles are also plotted. The symbols in the legend of each figure are as described for Fig. 3