there are five ways in which soft bulletproof vests absorb energy: (1) deformation of fabrics: including deformation in the direction of bullet incidence and tensile deformation in the vicinity of the incident point; (2) Destruction of fabrics: including fiber protofibrilation, fiber breakage, yarn structure disintegration, and fabric structure disintegration; (3) Thermal energy: Energy is dissipa
Bulletproof has Corresponding Bullets and Levels, and It is Unscientific to Talk About It Without Levels
The first batch of bulletproof vests developed by the United States in the 1920s and 1930s were protected by overlapping steel plates attached to sturdy clothing. This type of bulletproof vest, as well as later similar hard bulletproof vests, serves as a bulletproof device by ejecting bullets or shrapnel, or breaking them to consume and decompose their energy. The bulletproof mechanism of soft bulletproof vests mainly made of high-performance fibers is mainly based on the latter, which uses fabrics made of high-strength fibers to "grab" bullets or shrapnel to achieve bulletproof purposes.
Research has shown that there are five ways in which soft bulletproof vests absorb energy: (1) deformation of fabrics: including deformation in the direction of bullet incidence and tensile deformation in the vicinity of the incident point; (2) Destruction of fabrics: including fiber protofibrilation, fiber breakage, yarn structure disintegration, and fabric structure disintegration; (3) Thermal energy: Energy is dissipated through friction in the form of thermal energy; (4) Sound energy: the energy consumed by the sound produced by bullets hitting the bulletproof layer; (5) The deformation of the projectile. The bulletproof mechanism of the soft and hard composite bulletproof vest developed to improve its bulletproof ability can be summarized as "combining soft and hard".
When a bullet hits a bulletproof vest, the first thing that interacts with it is hard bulletproof materials such as steel plates or reinforced ceramic materials. During this instant of contact, both the bullet and the hard bulletproof material may undergo deformation or fracture, consuming most of the bullet's energy. High strength fiber fabric serves as a lining and second line of defense for bulletproof vests, absorbing and diffusing the remaining energy of bullets, and playing a buffering role, thereby minimizing non penetrating damage as much as possible. In these two bulletproof processes, the previous one played a major role in energy absorption, greatly reducing the penetration force of the projectile, which is the key to bulletproof.
Let's learn more about the types of bulletproof materials, which are divided into soft and hard materials.
The most common hard bulletproof materials are steel and ceramics, such as the armor of armored vehicles, steel inserts in bulletproof vests, and ceramic bulletproof inserts. Hard bulletproof materials rely on their own strength to resist bullets. As long as their strength and thickness meet the standard, all bullets can be blocked. The most commonly used ceramic bulletproof materials are silicon carbide, boron carbide, and aluminum oxide. In addition to steel and ceramics, titanium alloy is also a good bulletproof material, but its cost is relatively high.
There are many soft materials, such as famous PE and Kevlar. Aramid, Dinima, etc. These soft bulletproof materials are also called bulletproof fibers. They are all made into high-strength fibers and woven into cloth in a certain arrangement. Then, according to the level of protection, a certain number of layers of cloth are packed together to form a bulletproof layer. The bulletproof principle of bulletproof fiber determines that it can only intercept soft bullets.
So it is wrong to think the bullwrproof equipment is omnipotent. It is quite important to have a correct understanding about its bulletproof performance.