Fig. 3
From: Effect of projectile shape and interior structure on crater size in strength regime
Crater diameters (surface and inner) and depth normalized by projectile diameter, Dp, as a function of projectile bulk density, ρp, in g/cm3, a Ds/Dp, b Dpi/Dp, and c d/Dp. Symbols, “g-” and “b-”, indicate porous gypsum and basalt targets, respectively. Projectile structures and orientations are also indicated; symbols “]”, “[”, “=”, “filled black circle”, and “filled black square” indicate the impact of closed tubes from the closed side, the impact of closed tubes from the open side, the impact of open tubes from one open side, the impact of solid spheres, and the impact of solid cylinders, respectively. Symbols “open circle” and “open square” indicate the previous results of the impact of a spherical nylon projectile onto a porous gypsum block (1 point; Yasui et al. 2012) and of cylindrical nylon projectiles onto basalt blocks (6 points; Dohi et al. 2012)