Optimization of the ballistic properties of an Advanced Composite Armor system: Analysis and validation of numerical models subject to high velocity impacts

This research focuses on the optimization of the ballistic properties of an advanced composite armor system made by an Alumina ceramic outer layer and a second back-packing layer formed by aramidic fibers in an epoxy matrix. This new advanced armor can be integrated e.g. in superstructures of a fast speed patrol boat in order to ensure the protection of the crew and of the equipment installed on board. Different numerical simulations have been conducted in AutodynTM environment in order to model the non-linear dynamics of interactions between a NATO 7.62 Armour Piercing bullet and a range of different target models. To analyze the fragmentation and fracture behavior of ceramic tiles, different numerical modeling strategies were used. Moreover, the best setting of numerical parameters involved in the description of the mathematical model have been obtained and validated. These numerical results have been compared to experimental tests: the comparison has been used to analyze, modify and finally validate the most cost effective modeling strategy and the main parameters involved in the dynamic simulation of High Velocity Impact (HVI) obtaining a finite element model that describe with good agreement the results of the experimental tests.