
479Shock Physics
strength and density of 0.084 lbm/in.
3
The concrete dynamic tensile strength is 1000 psi. If
the projectile has the properties
a. Determine the duration of the impact event using the assumption of nonpenetra-
tion—use Hugoniots.
b. Determine whether the concrete will spall and if so determine the extent (in inches
of thickness) of the total spallation—use any method but list all assumptions.
c. Using your ability to determine the timing of the penetration events, explain why
or why not the aforementioned model is valid.
g
cm
g
cm
Steel
ρρ
00
7 896 2 232=
=
Concrete
=
=
cc
Concrete
00
4 569 40
Steel ...