Study of Auxetic Cellular Structures in Terms of Ballistic Performance
摘要
In this paper, an implementation of the metallic cellular structures with regular topologies into the ballistic panel as an effective solution against ballistic threats. For this purpose, the SLM technique with a maraging M300 steel (1.2709) powder was used to manufacture specimens to conduct basic experimental tests. The validation and correlation of the Tabulated Johnson – Cook (TJC) constitutive model was carried out prior conducting ballistics simulations using a 7.62 × 39 AP BZ steel core bullet according to level II of STANAG 4569. A representative cellular structure was used and the influence of impact place on ballistic effectiveness was analyzed. Moreover, three locations of bullet impacts were selected for tests since the amount of material directly beneath the projectile significantly impacts its energy dissipation due to its deformation. This study highlights the challenges associated with modeling the complex dynamic responses of materials under impact conditions, particularly in the context of high strain rates and ballistic testing. The results are promising in the scope of developing ballistic panels, and the paper provides valuable guidance for modelling and simulating the projectile impacts into the panels made of cellular structures.