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Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora.Developed by Stephanie Kwolek at DuPont in 1965, [3] [2] [4] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
The samples demonstrated similar depth, but the neat Kevlar displayed more yarn-pullout and yarn splaying. Observers found that the STF-Kevlar was able to withstand the stab test better than the neat Kevlar. Later on, in a spike impactor stab test, the STF-Kevlar demonstrated significantly better results than the neat Kevlar.
The IBA system consists of an Outer Tactical Vest (OTV) and two Small Arms Protective Insert (SAPI) ballistic plates. The OTV features a carrier shell, and three main (flexible) ballistic panel inserts (front left and front right panels, and a rear back panel), [4] which are made with a finely woven Kevlar KM2 fiber.
The Improved Outer Tactical Vest (IOTV) in MultiCam, as issued to United States Army soldiers. A bulletproof vest, also known as a ballistic vest or bullet-resistant vest, is a type of body armor designed to absorb impact and prevent the penetration of firearm projectiles and explosion fragments to the torso.
The soft kevlar panels have been tested to stop 9 mm 124 grain full metal jacket bullets at 1,400 ft/s (426 m/s) with minimal deformation and has a V-50 of roughly 1,525 ft/s (465 m/s). This means that the bullet has to be traveling faster than 1,525 ft/s (465 m/s) for it to have more than a 50% chance of breaking through the soft armor panel.
Modern aircraft powered by jet engines usually have them fitted with a sort of armour in the form of an aramid composite kevlar bandage around the fan casing or debris containment walls built into the casing of their gas turbine engines to prevent injuries or airframe damage should the fan, compressor, or turbine blades break free. [1]
Excellent thermal stability at temperature extremes, water repellency, chemical stability and resistance to petroleum products have made Kevlar KM2 an indispensable asset to the military personnel who use it every day." [1] "Kevlar KM2 fiber is a transversely isotropic material. Its tensile stress–strain response in the axial direction is ...
This performance is only assured when backed by the soft armor of the OTV (or any soft armor which meets military requirements for protection). The ceramic plate is backed with a shield made of Spectra, a material up to 40% stronger than Kevlar, [1] to trap any fragments of either plate or projectile and prevent them from injuring the wearer.