3D Transient Numerical Simulation For Sabot
Separation
Author(s)
D. Touati & S. Peles
Abstract
This paper presents a sabot discard model to predict sabots separation. The
model uses the FSI (Fluid Structure Interaction) numerical packages of
MSC-DYTRAN to determine the evolution of sabot separation motion. The 3D
model enables us to calculate the asymmetric sabots discard trajectory using
Euler Lagrange coupling. We neglect the blast region effect on the sabot discards
process near the muzzle. Physical quantities such as linear and angular
displacement, velocities, acceleration and exerted forces on the sabot structures
are computed. Simulated results and experimental data show close agreement.
Keywords: sabots petals, discard, kinetic energy penetrator.
1 Introduction
The kinetic energy penetrator is a widely used anti tank munitions. Its lethality is
due to the kinetic energy imparted by the penetrator to the target with impact
velocities of between 1.4 to 1.8 km/s. The penetrator is launched by means of a
sabot assembly, consisting of three aluminum sabot petals, required to minimize
the penetrator’s in bore balloting. The process of sabot separation begins as the
projectile leaves the gun tube. Because of the transverse motion of the projectile
within the gun, energy is stored in the elastic sabot petals. As the projectile
leaves the muzzle, the constraints of the gun tube are released and the sabot
elements are able to move laterally outward. Aerodynamic forces acting on each
of the sabot petals causes them to lift up and disengage from the buttress grooves
of the penetrator rod to permit its unconstrained, low drag flight to the target. It
has been demonstrated by Schmidt and Shear [1] that aerodynamic interference
generated by the sabot components can be a significant source of projectile
Keywords
sabots petals, discard, kinetic energy penetrator.
Related Book
Other papers in this volume
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