NUMERICAL INVESTIGATION OF A HIGH-SPEED PROJECTILE PENETRATION INTO BI-LAYERED LIGHTWEIGHT TARGETS

Document Type : Original Article

Authors

Egyptian Armed Forces.

Abstract

ABSTRACT
In this paper, Autodyn-3D hydrocode is used to simulate the penetration process of
small caliber steel projectiles into bi-layered targets with finite thicknesses consisting
of silicon carbide ceramic facing tile backed by kevlar/epoxy composite plate. The
numerical results of the hydrocode program are used to assess the predictions of the
proposed analytical model [7]. So, the input data of the projectile and target materials
to the hydrocode are coincide with that input to the analytical model [7]. These data
include geometries of projectile and target as well as mechanical and physical
properties of their materials such as density, modulus of elasticity, yield strength and
Poisson's ratio. The main procedures used to simulate the penetration process are
introduced.
The obtained numerical results are compared with the predictions of the analytical
model [7] due to the impact of a Fragment Simulated Projectile (FSP) having the
same penetration capability as that of 7.62 mm NATO projectile [8] into
ceramic/composite targets with different velocities; good agreement is generally
obtained. In addition, Samples of the time histories results predicted by the
hydrocode are presented with analyses and discussions. Finally, It can conclud that
the Autodyn-3D hydrocode is considered as a quick tool for designing and optimizing
the bi-element lightweight armour capable of defeating a projectile of certain threat.

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