To understand the failure modes and impact resistance of double-layer plates separated by water, a flat-nosed projectile was accelerated by a two-stage light gas gun against a water-filled vessel which was placed in an air-filled tank. Targets consisted of a tank made of two flat 5A06 aluminum alloy plates held by a high strength steel frame. The penetration process was recorded by a digital high-speed camera. The same projectile-target system was also used to fire the targets placed directly in air for comparison. Parallel numerical tests were also carried out. The result indicated that experimental and numerical results were in good agreement. Numerical simulations were able to capture the main physical behavior. It was also found that the impact resistance of double layer plates separated by water was lager than that of the target plates in air. Tearing was the main failure models of the water-filled vessel targets which was different from that of the target plates in air where the shear plugging was in dominate.
[1]
T. W. Ipson,et al.
Ballistic Perforation Dynamics
,
1963
.
[2]
S.T.S. Al-Hassani,et al.
Static and dynamic penetration of steel tubes by hemispherically nosed punches
,
1990
.
[3]
E. Schneider,et al.
Hypervelocity impacts on gas filled pressure vessels
,
1997
.
[4]
Werner Goldsmith,et al.
The mechanics of penetration of projectiles into targets
,
1978
.
[5]
S. Dey,et al.
On the main mechanisms in ballistic perforation of steel plates at sub-ordnance impact velocities
,
2009
.
[6]
Gang Chen,et al.
Deformation and Failure Modes of Soft Steel Projectiles Impacting Harder Steel Targets at Increasing Velocity
,
2008
.