What is the principle of cutting cloth

Soldiers at the time wore heavy metal or leather armor that greatly restricted daily activities due to its weight.

How to better protect personal safety?

This requires a lot of personal protective armor materials, such as bulletproof vests, helmets, cut-resistant gloves, stab-resistant cut-resistant cloth, etc.

Some countries strictly control the use of guns and ammunition, and the rest is how to protect the human body from bayonets and daggers. Sharp weapons hurt this pressing issue.

The damage caused by knives and daggers can be divided into two types: cut-resistant and stab-resistant.

During the piercing process, the knife will come into contact with the puncture and cut-resistant cloth to begin cutting the fabric.

Therefore, the material of the anti-stab and anti-cutting cloth must be tightly organized so that the knife tip can be clamped. At the same time, multiple layers of fabric are required. Overlap to resist the energy that accompanies the tip.

The task of puncture prevention is to prevent the initial cutting and energy dissipation of the tool. Cut resistance is the basis of cut resistance, but having cut resistance does not guarantee good puncture resistance.

A certain degree of material tightness is also required.

Generally speaking, puncture resistance is more difficult than cut resistance.

According to previous data, the anti-stab mechanism is mainly a friction self-locking mechanism. As the thorn deepens, the yarn will be pulled and swelled, and the expansion of the yarn will cause the adjacent yarn to be pulled and tightened.

The force required for wire drawing is the sum of the frictional forces received by the wire during the wire drawing process. During piercing, the blade will stop deepening when the pierced yarn reaches a point where it cannot continue to expand.

The yarn friction required for expansion is very high. As long as the loop line can continue to slide, the blade will continue to deepen. If the yarn is strong enough, the fabric will deform when the loops reach the point where they cannot slip. This state is called the "locked" state.

This state is achieved because of the amount of yarn that is tightened due to the sliding of the yarn during the piercing process, and the number of yarns that are tightened as the yarn slides.

It can be seen that the main damage mechanism of the stab and cut resistant cloth is the compressive shearing of the tool along the material cross-section and the tensile fracture of the yarn along the axial direction.

Therefore, the yarn material in the stab-resistant material is required to have high shear resistance. High capacity and tensile strength.

Additionally, puncture knives typically have sharper tips. Therefore, in order to prevent the knife tip from penetrating the fabric, the stab-resistant fabric must have sufficient tightness.