So whadja get for penetration? :image035:
A: The quantitative model operates under three conditions:
1. All significant plastic deformation of the projectile occurs within periods of 10^-4 seconds.
2. The projectile behaves as a rigid body after expansion (no further ductile or ablative erosion occurs) and exhibits no significant yaw during any portion of the penetration event.
3. The terminal behavior of the projectile is governed by a material strength variable and the inertial and viscous (or frictional) drag losses that occur during the projectile's penetration through the medium.