Ordinary bullets, especially lead-cored or ordinary steel-cored bullets will deform after contacting the bulletproof material. In this process, the bullet consumes a considerable part of the kinetic energy, which effectively reduces the penetration force of the bullet, which is the energy absorption of the bullet. An important aspect of the mechanism. Bulletproof materials also consume bullet energy through fiber stretching and breaking, and a small part of the energy is converted into heat energy through friction (fiber/fiber, fiber/bullet) and converted into sound energy through impact.
The factors affecting the bulletproof performance of body armor can be considered from two aspects: the interacting projectile (bullet or shrapnel) and the bulletproof material. As far as the projectile is concerned, the ability of the bulletproof equipment to block the warhead is mainly related to the kinetic energy, shape, structure, material and angle of incidence of the warhead or fragments, etc., which determine its penetration force. For different projectiles, different bulletproof materials and structure. The stress wave generated after the warhead hits the fabric needs to spread as soon as possible. Therefore, the energy of the bullet can be diffused faster when the stress wave velocity C is large, and the energy can be transferred to the auxiliary fiber through the stress wave propagation.
