Researching the Influence of Preload on Vibration Characteristics in the Ballistic Recorder Vibration Damping System

Table 1

Shell material model and parameters [18].

Material	Steel
MAT_JOHNSON-COOK
G (GPa)	81.8
A (MPa)	1445
B (MPa)	1326
C	0.005
m	1.12
n	0.365
(K)	393
(K)	1763
EOS_GRUEISEN
ρ (g/cm^3)	7.75
(m/s)	4530
S (m/s)	1.49
(GPa/K)	525
Γ	1.23