Dynamic Characterization and Constitutive Modelling of ARMSTAL 500 Steel
Journal Title: Problemy Mechatroniki. Uzbrojenie, lotnictwo, inżynieria bezpieczeństwa - Year 2015, Vol 6, Issue 3
Abstract
The behaviour of a high strength steel (ARMSTAL 500) has been investigated using a combination of quasistatic and dynamic tests for a wide strain-rate range 1·10[sup]-4[/sup] – 3·10[sup]3[/sup] s[sup]-1[/sup]. A uniaxial testing machine and a Split Hopkinson Pressure Bar (SHPB) have been used under well controlled testing conditions. Next, the effect of the strain hardening, the strain rate hardening, loading history and stress triaxiality on the strength and ductility of the material has been studied. The present work also describes constitutive and damage models and their implementation available in the nonlinear finite element code LS DYNA. Calibration of constitutive model parameters and damage criteria is most often accomplished via regression techniques applied to laboratory data. A 3D numerical simulation of perforation of ARMSTAL 500 plates with 7.62 × 51 mm AP projectile were carried out with detailed models of target and compared with experiment in order to validate the calibrated models. As it will be shown, ARMSTAL 500 steel is a high strength steel with modest strain-rate sensitivity. The study indicates that the penetration depth can be predicted quantitatively and qualitatively with MJC hardening parameters calibrated from compression tests. The Modified Johnson–Cook constitutive model with Cockcroft and Latham failure model can predict the projectile residual speed and the fragmentation process followed very closely by MJC failure criteria.
Authors and Affiliations
Djalel Eddine TRIA, Radosław TRĘBIŃSKI
Keywords
Related Articles
- EP ID EP77499
- DOI 10.5604/20815891.1166973
- Views 81
- Downloads 0
The Control System of the Active Magnetic Bearing in the Aircraft Nacelle Actuation
The flight control system of the modern aircrafts, i.e. Boeing 787 and Airbus A380, are designed in the “more electric aircraft” technology (MEA). This technology make an assumption of the use more electrical elements in...
Flexible Modular Armour for Protection Against the 5.56 x 45 mm SS109 Projectiles
The paper presents the results of the depth of penetration tests (DOP) and numerical simulations of the 5.56 x 45 mm SS109 projectile impact onto passive, layered armours placed on the armour backing material. Investiga...
Heat Transfer Calculations in Barrel Cover of 35 mm Naval Armament System Gun
This paper presents the results of numerical simulations of non-stationary heat transfer in a 35 mm anti-air gun barrel cover made of composite materials. The cover protects the gun against weather conditions, including...
The Conception of the Impact Fuse for HE Ammunition Fired From the RAK 120 mm Self-Propelled Mortar
In the paper the conception of new impact fuse for HE projectiles fired from the RAK 120 mm self-propelled mortar was presented. The structure and the principles of operation of basic units of the fuse were also shown.
Analiza stabilności nieliniowego układu giroskopowego do napędu koordynatora celu przeciwlotniczego pocisku rakietowego
W opracowaniu przedstawiono analizę stabilności metodą Lapunowa nieliniowego układu giroskopowego, zarówno swobodnego, jak i sterowanego. Sterowany układ giroskopowy bardzo często stanowi napęd w optycznym koordynatorze...