The science of personal body armour is progressing, but so too is the level of threat that must be defeated in order to keep the armour wearer safe. Current hard armour should withstand multiple impacts from a 7.62 bullet or a single impact from a 30 calibre armour piercing bullet. However, peacekeepers are now facing much larger threats including 50 calibre armour piercing bullets. The armour available today cannot withstand these larger threats and even if the projectile does not penetrate, the deformation of the armour can still cause fatal injury. Understanding how material properties contribute to a composite material's performance during ballistic impact is necessary for the development of new body armour. A numerical model developed for ballistic impact on Keviar panels was used to perform a parametric study on material properties. The effect of in-plane modulus of the plies, through thickness modulus of the plies, and the shear strength between the plies on backplane deformation and velocity was studied. The analysis showed that increasing the in-plane modulus decreases the backplane deformation, and increasing the through thickness modulus increases the backplane deformation. The inter-ply shear strength had no significant effect, and factor interactions were minimal. Further study in this area is necessary.
Effect of material properties on the ballistic impact resistance of kevlar
Einfluss der Werkstoffeigenschaften auf die ballistische Stossfestigkeit von Kevlar
2001
7 Seiten, 2 Bilder, 5 Tabellen, 4 Quellen
Aufsatz (Konferenz)
Englisch
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