In practice, the material used for bulletproof vest does not allow excessive deformation, so the fiber used for bulletproof vest needs to have a high resistance to deformation at the same time, that is, high modulus. The influence of the structure of the yarn on the ballistic resistance is due to the difference in the single fiber strength utilization rate and the overall elongation deformation ability of the yarn due to different yarn fabrics.

Bulletproof vest is a kind of protective clothing used to reduce bullet damage like armor.

The key to the energy absorption of such fragments by the soft bulletproof vest lies in the fact that the fragments cut, stretch and break the yarns of the bulletproof fabric, and cause the interaction between the inner yarns of the fabric and the different layers of the fabric to cause the overall deformation of the fabric. In the above-mentioned processes, the fragments do work to the outside, thereby consuming their own energy.

Bulletproof vest is a kind of protective clothing used to reduce bullet damage like armor. They are worn by the police and the army.

Software bulletproof vest. The bulletproof layer is generally made of multiple layers of high-strength and high-modulus fiber fabrics quilted or directly laminated. When bullets and fragments penetrate the bulletproof layer, they will produce directional shear, tensile failure and delamination failure, thereby consuming their energy.