Per: RAI FELIPE PEREIRA JUNIO (IME), Luiz Felipe Santiago Proença (IME), Rafael da Fonseca Guedes (ime), José Carlos Ferreira Fontes (UNISUAM), SERGIO NEVES MONTEIRO (IME), LUCIO FABIO CASSIANO NASCIMENTO (IME)
Abstract:
Honeycomb structures are increasingly standing out in terms of both degree and number of technological applications, particularly those with reentrant hexagonal geometry. These structures are recognized for their lightweight nature, high rigidity, and energy absorption capabilities, especially in ballistic armor applications. The reentrant morphology imparts auxetic behavior to the structures, with a negative Poisson's ratio, resulting in shear resistance, buckling resistance, and fatigue crack propagation superior to conventional structures. The Finite Element Method (FEM) is highlighted as a valuable tool for simulating the properties of these structures, allowing for preliminary studies without the need for physical sample fabrication. FEM has been applied in various areas, ranging from static and dynamic analysis to evaluating behavior under unidirectional compression, explosion, ballistic impact, and projectile penetration. Computational simulation enhances this field by increasing the number of possibilities to accurately predict the behavior of these structures, such as simulating deformation after ballistic impact and correlating identified stress concentration points. These results underscore the importance of FEM in assessing the behavior of these structures, providing valuable insights for practical application development