There are two basic mechanisms for bulletproof vests and helmets: One is to eject the fragments formed by the fragmentation of the projectile body; The second is to release the kinetic energy of the warhead through bulletproof data. Hard bulletproof vests and steel bulletproof helmets are designed to provide bulletproof effects by ejecting bullets or fragments, or causing them to shatter and consu
What is the bulletproof mechanism of bulletproof vests and helmets?
There are two basic mechanisms for bulletproof vests and helmets: One is to eject the fragments formed by the fragmentation of the projectile body; The second is to release the kinetic energy of the warhead through bulletproof data.
Hard bulletproof vests and steel bulletproof helmets are designed to provide bulletproof effects by ejecting bullets or fragments, or causing them to shatter and consume their synthetic energy. Soft bulletproof vests and lightweight bulletproof helmets use fabrics made of high-strength fibers to "grab" bullets or shrapnel to achieve the purpose of bulletproof.
The study indicates 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, collapse of yarn structure, and collapse of fabric structure;
(3) Thermal energy: Energy is distributed in the form of thermal energy through friction;
(4) Sound energy: the energy consumed by the sound produced by bullets hitting the bulletproof layer;
(5) The deformation of the projectile.
A composite bulletproof vest is a soft bulletproof vest with a high-strength PE bulletproof board or ceramic board added to the chest and back to achieve higher bulletproof performance. Its bulletproof mechanism can be summarized as a combination of soft and hard measures.
When a bullet hits a bulletproof vest, the first thing that acts on it is hard bulletproof materials such as high-strength PE board, reinforced ceramic material, or steel plate. 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.