Aramid fibers have excellent impact resistance and will not break under pressure because they are tough and can absorb large amounts of energy. It is widely used in the manufacture of bulletproof vests, armor for boats, kayaks, and military vehicle components. The impact resistance of aramid fiber composites is five times that of carbon fiber composites (tested using the drop weight impact method). This extraordinary resistance to impacts or bullets is caused by the long chains of atoms that form the structure of aramid.
Due to their excellent impact resistance properties, aramid fibers are widely used for military purposes in the manufacture of bulletproof vests and tank armor materials. Bulletproof vests are typically made from a material consisting of dozens of layers of aramid, such as Kevlar, and include a ceramic plate between the two layers. The protective cover used by some armored vehicles (such as the American M1 tank) is made of steel-aramid-steel material and can resist anti-tank missiles with a diameter of up to 700mm.
Aramid fiber is widely used in the field of bulletproof vests
Furthermore, in addition to protecting the tank itself, the steel-Kevlar-steel shield also protects the crew by absorbing the kinetic energy generated by penetrating missiles. Another application of Kevlar is on the Boeing AH-64, a US military main attack helicopter equipped with Kevlar rotors. Here, Kevlar protects against bullets up to 23 mm in diameter.
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