Modeling The 14.5 Mm BS41 Projectile For
Ballistic Impact Computations
Author(s)
T. J. Holmquist, G. R. Johnson & W. A. Gooch
Abstract
This article presents the characterization and modeling of the U. S. Army
Research Laboratory (ARL) 14.5 mm BS41 projectile for ballistic impact
conditions. The ARL BS41 is a complex projectile that includes a steel case,
inert filler materials, and an armor piercing tungsten carbide (WC) core. The
characterization of the WC core is the focus of this work. The core material is a
composite comprised of 93% WC and 6% cobalt (Co) and behaves like a very
strong metal with little ductility. An approach is presented that determines
Johnson-Cook strength and fracture model constants for the WC core using
limited laboratory data along with ballistic impact experiments. Numerous 2D
computations are presented (including experimental results) that demonstrate the
response of the BS41 and the ability to model its behaviour.
Keywords: tungsten carbide, cobalt, BS41 projectile, strength, fracture, ballistic
performance, ballistic experiments.
1 Introduction and background
The former Soviet, and now Russian, 14.5 mm heavy machine gun is widely
proliferated worldwide, predominately on wheeled combat vehicles. The
original BS41 was developed by the Soviet Union and fielded in 1941 for use in
the PTRD-41 bolt-action antitank rifle. The first U. S. surrogates of the Soviet
BS41 were made in 1961 with a second lot produced in 1985. The surrogates
were produced by Brass Extrusion Laboratories of Bensenville, IL. These
projectiles were used domestically for many decades for armor development, and
for ballistic acceptance testing for steel, aluminum and titanium armor plates.
The 30,000 projectiles produced, have now all been depleted in domestic testing.
Keywords
tungsten carbide, cobalt, BS41 projectile, strength, fracture, ballistic
performance, ballistic experiments.
Related Book
Other papers in this volume
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