Simulation of Steel Armour Penetration Using the Johnson-Cook Model

• Autorzy: Wiśniewski A. , Tomaszewski Ł.
• Konferencja: Scientific Aspects of Armament and Safety Technology. 8 International Armament Conference ; 6-8.10.2010 ; Pułtusk, Poland
• Języki publikacji: EN

Abstrakty

EN

The numerical simulations were carried out of penetration of 12.7 mm armour piercing projectile into the ARMOX 500 steel armour with the use of the AUTODYN 2D software program applying axis symmetry. The calculations were performed by means of the SPH (Smooth Particle Hydrodynamic) method. A constitutive Johnson-Cook model was used for both the armour and the projectile. The influence of discretization density of the numerical model on the residual velocity vr of the projectile, its wear and time of calculations was studied. An eight times decrease in the distance between the SPH particles in the numerical model causes an over 130 fold increase of the projectile residual velocity and a 960 fold increase in the calculation time. The examined aspects included the influence of armour thickness g and yield stress Re of the projectile material on its residual velocity and manner of the projectile and armour damage. The residual velocity of the projectile decreases together with an increase of the armour thickness and for g = 20 mm is vr = 300 m/s. Together with a decrease of the yield stress of the projectile material its residual velocity also decreases, the wear of the projectile increases, the shape and the dimensions of cross section hole in the armour also change.

Słowa kluczowe

EN

numerical simulations; AUTODYN; SPH method; Johnson-Cook constitutive model

• Wydawca: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
• Rocznik: 2011
• Tom: Vol. 2, Nr 4 (6)
• Strony: 27--36
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Wiśniewski A.

autor

Tomaszewski Ł.

• Military Institute of Armament Technology, 7 Wyszyńskiego St., 05-220 Zielonka, Poland

Bibliografia

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