Supersonic Penetration by Wedges and Cones into Dry Sand (Preprint)
DE TECHNOLOGIES INC KING OF PRUSSIA PA
Pagination or Media Count:
An analytical model of penetration by non-deforming pointy projectiles into dry sand is proposed. The model postulates that an oblique compaction wave in the sand is attached to the penetrators tip. Sand is modeled by the P-alpha porosity model up to full compaction, then is taken as incompressible. The sands compaction is considered the most important effect strength and friction are neglected. The model handles wedges, for which a closed-form solution is derived, and cones, which require numerical integration. For a given penetration velocity, the model predicts the shock angle and the pressure on the penetrator surface. Hydrocode computations agree closely with the model.
- Fluid Mechanics