Numerical Simulations of Penetration of 9 mm Parabellum Bullet into Kevlar Layers – Erosion Selection in Autodyn Program
Journal Title: Problemy Mechatroniki. Uzbrojenie, lotnictwo, inżynieria bezpieczeństwa - Year 2011, Vol 2, Issue 3
Abstract
A numerical model was performed of penetration of 9 mm Parabellum bullet into Kevlar layers, with the use of the AUTODYN software program. Simulations were conducted with a bullet modelled by means of the Smooth Particle Hydrodynamics-method (SPH) and with an armour coded by a Lagrange grid. The simulations were performed for 20 layers of Kevlar (one layer: thickness 0.3 mm, surface density – 220 g/cm2) and for impact velocity of 350 m/s. The comparison included the mean velocity of the bullet (which takes into account the velocities of particles that separated from the part of the bullet penetrating the armour) and the velocities at gauge points established near the axis of symmetry of the bullet. The gauge point representative for velocity of the bullet was indicated. With regard to excessively large deformations of the grid, that caused interruption of the initial simulation, the criteria of erosion (cells removal) were introduced. From effective strains available in the AUTODYN software, the effective instantaneous geometric strain was selected. Influence of the erosion strain (value of strain for which cells are removed) onto the mass of removed cells and the residual velocity of the bullet were investigated. Simulations with neglect and respect to mass of removed cells in further calculations were performed. The erosion criteria for which further simulations should be conducted were indicated.
Authors and Affiliations
Adam WIŚNIEWSKI, Dawid PACEK
Keywords
Related Articles
- EP ID EP62849
- DOI -
- Views 141
- Downloads 0
Some Relationships Among Thermal Properties, Detonation Parameters and Sensitivity of Nitramine Fillers in Formex Based PBXs
Thermal behavior and decomposition kinetics of formex-bonded PBXs based on some attractive cyclic nitramines (BCHMX, HMX, RDX and CL-20) were investigated by means of nonisothermal Thermogravimetry (TG) and Differential...
Karabinek reprezentacyjny MSBS-5,56R systemu MSBS-5,56
W dniu 3 maja 2016 r. na Placu Zamkowym w Warszawie, podczas uroczystości państwowych z okazji 225. rocznicy uchwalenia Konstytucji 3 Maja – w obecności Prezydenta RP, najwyższych władz Rzeczpospolitej oraz licznie zebra...
Acceleration of Signal Processing Algorithms in Seekers Using Graphics Processing Units
The paper presents a discussion on the issue of possible acceleration of radiolocation signal processing algorithms in seekers using graphics processing units. A concept and implementation examples of algorithms performi...
The Analysis of the Processes Influencing on the Projectile Movement in the Period of Transitory Ballistics. Part I. An Analysis of Shock Parameters of the Gases Compressed by Projectile Moving in the Barrel
In the paper evaluation of the parameters of gases compressed by the piston moving in the tube is presented. The relations describing values of the pressure and mass density of the compressed gas as well as velocity of s...
Developing the Physicochemical Foundations to Form Heterogeneous Rocket Propellants Using the Loading Method
The physicochemical foundations are being developed to form propellants using the loading method. The advantages of this method include the possibility of achieving a greater packing density of the particulates, no requi...