Скачать или смотреть Ricochet and Oblique Impact in Granular Material

Leah K. Roth and Heinrich M. Jaeger,
The University of Chicago

Oblique impact of a high-speed projectile into granular material can lead to ricochet. The conditions eliciting this behavior are, however, not well understood. We use molecular dynamics simulations to map out the phase space, quantifying the dependence on impact speed and angle as well as material properties. Our initial findings indicate that the maximum impact velocity is directly related to the speed of sound in the material, while the shape of the resulting compression front hints at the origin of a maximum ricochet angle. We are currently investigating the effect of granular shock waves on projectile behavior in supersonic impacts.