Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Nanotechnology for Personal Protection Systems: The New Nano-Modified Bullet Proof Vest Development
Submission Author:
Antonio Avila , MG
Co-Authors:
Aline Oliveira, Suchilla Garcia Leão, Fernanda Luiza Rinco de Mendonça Lima, Guilherme Arantes, Marina Georgia Melo Martins, Matheus Norton Mello, Antonio Avila
Presenter: Suchilla Garcia Leão
doi://10.26678/ABCM.COBEM2017.COB17-1124
Abstract
Now-a-days in Brazil, security forces are regularly exposed to events where fire arms and outlaws are involved. Moreover, traditional bullet proof vest, commonly used by these security forces, have a life spam of five years and its replacement cost is high. Therefore, there is a need to not only to improve the ballistic protection systems and, at same time, expand the life spam of such bullet proof vests. This paper deals with development of a new class of bullet proof vests where aramid fibers are impregnated with shear thickening fluids (STF) based on a combination of ethylene glycol two nanoparticles, i.e. nanosilica and calcium carbonate. This approach allow us to develop a mathematical model based on behind armor blunt trauma (BABT) condition. The ballistic tests were performed following NIJ 0101.06 standard using 9 mm Full Metal Jacket (FMJ) and 357 Magnum Jacketed Soft Point (JSP), with average mass of 8.0 g and 10.2 g, respectively. The average energy measured for each ammunition type used (9 mm and 357) was around 520 J and 980 J, respectively. The projectile penetration depth or the 19 layers/SFT system was 0.13 mm/g and 0.17 mm/g (9 mm and the magnum 357 ammunitions), while for the 32 layers aramid system without treatment was 0.13 mm/g and 0.16 mm/g, respectively. Therefore, the new bullet proof material with 19 layers impregnated with SFT proved to have the same ballistic protection of a 32 layers of aramid textiles with any treatment.
Keywords
Composite Materials, ballistic tests, shear thickening fluid, nanoparticles
