On The Truss-type Structures Backing The
Ceramic Tiles In The Ballistic Panels Subjected To
The Impact Of Hard Steel Projectiles
Author(s)
A. Morka & P. Dziewulski
Abstract
The objective of this paper is a feasibility study of a new concept for ceramic
backing in multilayer ballistic panels. The truss structures were applied as a
backing layer. They were based on a diamond crystal structure. The analysis of
length/diameter ratio of the bars was performed. It was aimed at the achievement
of the required mechanical properties maximizing the ballistic resistance and
minimizing panel surface density. The panel structure is considered as a
composition of Al2O3 ceramic tile backed by a plate in a truss form made of
aluminum alloy or steel. These results were compared with classic multilayer
solutions based on solid aluminum alloy backing plates. The study was carried
out for a normal impact of the AP (armor-piercing) 7.62x51 projectile type with
tungsten carbide (WC) core. A method of computer simulation was applied to
study the problem. The Finite Element Method (FEM) implemented in the LSDYNA
code was used. The full 3D models of the projectile and target were
developed with strain rate and temperature-dependent material constitutive
relations. The Johnson-Cook constitutive model with Gruneisen Equation of
State (EOS) was applied to describe the behavior of metal parts: aluminum alloy
and projectile’s core. However, the Johnson-Holmquist model was used to
describe the ceramic material. The Boundary Conditions (BC) were defined by
supporting the panel at its back edges. The obtained results show the alternative
solution to the classic solid plates supporting the ceramic layers in ballistic
panels. It was identified that the main deformation mechanism in truss-type
backing components is buckling if the L/D ratio goes up. A virtual prototyping
technique could be applied to manufacture the developed truss structure.
Keywords: computational mechanics, finite element method, ballistic protection,
multilayer armour, ceramic armour systems, truss structure.
Keywords
computational mechanics, finite element method, ballistic protection,multilayer armour, ceramic armour systems, truss structure
Related Book
Other papers in this volume
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