
459Shock Physics
Problem 4
A 4 in. long steel bar impacts a 12 in. thick slab of 4340 steel at 1000 m/s and bounces off.
Assuming the impact is normal and using one-dimensional equations, determine
1. The duration of the impact event
Answer: ∆t = 33.00 [μs]
2. The pressure developed at the interface
Answer: p
1
= 20.980 [GPa]
7 896
4 569
0
0
g
cm
km
s
Steel
Steel
3
Ste
ρ
=
=
.
.c
s
eel
L
Steel
km
=
=
1 490
5 941
.
.c
Problem 5
We would like to determine how fast a large fragment will be propelled by an explosion
using Hugoniots. Assume we have a 6 in. cube of steel that has a pressure of 5.0 GPa
applied to one face for 3 μs. Determine the velocity ...