A. BRAGOV, F. ANTONOV, S. MOROZOV, D. KHOMINICH
Light-Weight Armour Group (LWAG) conference-2014
The work is focused on methodology of penetration modelling of multi-layered KE protection plates. The method described, intended for penetration process modelling and bulletproof estimation of multi-layered barriers, is based on three-dimensional computer simulation. The nonlinear material behaviour models are proposed for the most common protection materials, like metals, aramid fabrics, ceramics, UHWMPE. For the proposed models, the methods for identifying the parameters of governing equations and failure criteria are given, based on Split Hopkinson bar technique. The finite element model database on projectiles is developed, including standard projectiles, mentioned in NATO and RF standards on ballistic protection. The material database structure is developed, which includes the parameters of suggested material models for each material used. On the basis of proposed method, the software interface for LS-DYNA® code is developed, combining all the mentioned databases and allowing to perform penetration calculations of different barriers with different projectiles, velocities and impact angles. With the developed software tool, the sample optimization problem for multi-layered armour penetration was solved using pSeven optimization software by DATADVANCE®. It was shown that the nontrivial solution of such problem exists, confirming that the optimal thickness ratio can be obtained for given set of materials in multi-layered amour concept.