Numerical Simulation Of The Tumbling Of Kinetic
Energy Projectiles After Impact On
Ceramic/metal Armours
Author(s)
F. Gálvez, S. Chocron, D. Cendón & V. Sánchez-Gálvez
Abstract
Ceramic metal armours are widely accepted as a very efficient solution for
protection of lightweight armoured vehicles against kinetic energy projectiles.
The high hardness of ceramics is responsible for eroding the projectiles while
failure of the ceramic is progressing, while the backing material is supporting the
ceramic. When the impact is oblique, failure of the ceramic is completely
asymmetrical, and therefore the forces applied to the projectile are distributed
non-symmetricaly making the projectile tumble after the impact. This behaviour
is very efficient for add-on armours because a side impact on the main armour
penetrates much less than a front impact. In this paper a numerical simulation of
this effect is studied. The simulations have been performed using Autodyn 3D. A
tungsten projectile impacting onto alumina backed with aluminium has been
simulated. Different impact angles have been studied. The influence of the
spinning of the projectile is also considered. The results show that the tumbling
of the projectile only appears on ceramic faced armours, while in the case of
impact onto a monolithic metallic material such as steel it does not appear. The
results show also that tumbling increases with the impact angle.
Keywords: ballistic impact, kinetic energy projectiles tumbling, ceramic
armours, numerical simulation.
1 Introduction
In this paper the influence of the spin velocity of a projectile impacting onto
ceramic-metal armour is studied numerically. The variables studied are residual
Keywords
ballistic impact, kinetic energy projectiles tumbling, ceramic
armours, numerical simulation.
Related Book
Other papers in this volume
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