There are roughly two types: one is to eject the projectile and fragmented fragments, and this type of bulletproof vest is mostly made of hard bulletproof materials such as metal, bulletproof ceramics, and metal ceramic composite materials. Another type is to consume the kinetic energy of the warhead, and these bulletproof vests are mostly made of soft materials such as bulletproof nylon, aramid f
The Working Principle of Bulletproof Vests
There are roughly two types: one is to eject the projectile and fragmented fragments, and this type of bulletproof vest is mostly made of hard bulletproof materials such as metal, bulletproof ceramics, and metal ceramic composite materials. Another type is to consume the kinetic energy of the warhead, and these bulletproof vests are mostly made of soft materials such as bulletproof nylon, aramid fiber, and UHMWPE fiber.
The bullet will cause tensile deformation and shear effects on the fibers, resulting in the diffusion, propagation, and absorption of impact energy. Finally, the bullet and its fragments are wrapped in a bulletproof fiber layer. Generally speaking, hard bulletproof materials have strong bulletproof ability; Soft bulletproof materials have strong ability to prevent bullets and fragments.
At present, most bulletproof vests are a combination of soft bulletproof panels and hard bulletproof plates. Hard bulletproof plates, as the first line of defense, consume most of the energy of the warhead, while soft bulletproof panels, as the second line of defense, absorb and diffuse the remaining energy of the warhead and fragments, while playing an effective buffering role.
From the perspective of protective function, bulletproof vests can generally be divided into two categories: one is bulletproof, and the other is resistant to various explosives, such as landmines, shell fragments, and grenade fragments.
Different levels of bulletproof vests have different protection standards. For example, there are five types of bulletproof vests in the United States. The first type can withstand 9mm caliber pistol bullets, while the fourth type can withstand 7.62mm caliber high-power rifle bullets.
Generally speaking, the higher the level of protection, the heavier and larger the size of the bulletproof vest. After wearing it, it will appear more clumsy and the comfort level will be greatly affected. Therefore, when wearing a bulletproof vest, you can flexibly choose according to the actual situation. At present, the weight of most bulletproof vests is controlled between 2-6 kilograms.