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 152
- Downloads 0
Koncepcja miniaturowego niskokosztowego alertera podczerwieni dla Wojsk Obrony Terytorialnej
W artykule zaprezentowano koncepcję projektu niskokosztowego alertera podczerwieni dedykowanego dla Wojsk Obrony Terytorialnej, który mógłby być wykorzystany jako uniwersalna platforma rozpoznawcza bliskiego zasięgu dla...
Niektóre wyniki badań symulacyjnych wpływu charakterystyk konstrukcyjnych karabinka automatycznego na jego odrzut i podrzut
W pracy przedstawiono wyniki badań symulacyjnych odrzutu i podrzutu karabinka kalibru 5,56 mm, działającego na zasadzie odprowadzenia gazów prochowych przez otwór boczny w lufie, z krótkim ruchem tłoka gazowego. Za pomoc...
PMN, PMN-2 and PMF-1 Landmines Detection Using Active Infrared Thermography with Microwave Excitation
In this paper, active infrared thermography is used to detect antipersonnel landmines: PMN, PMN-2 and PMF-1. Mentioned landmines have very low metal content and their casings are made of plastic, therefore are considered...
Theoretical and Experimental Research of Selected Gas Port Parameters Influence on Ballistic and Kinematic Characteristics of Gas Operated Weapon
Some results of theoretical and experimental investigations of gas hole diameter, gas control hole diameter, initial volume of gas chamber and gas piston diameter influence on ballistic and kinematic parameters of gas op...
Parametric Design of Aircraft Wing with Curved Leading Edge
In order to ease modelling procedures, eliminate repetitive effort and save time, modern CAD tools offer the ability to automate tasks via a programming language. Moreover, when the design is an iterative process, the au...