Ki Ang Bulletproof Vest Protection Instructions

Ki Ang Bulletproof Vest Protection Instructions

Can bulletproof vests protect against bayonets?

There are two types of bulletproof vests: soft and hard. The main structure of soft bulletproof vests is made of bulletproof fibers, and any pure fiber fabric cannot effectively resist puncture-type damage. Therefore, although soft bulletproof vests can withstand pistol bullets and even some submachine gun bullets, they cannot withstand sharp knives, especially puncture attacks by needle-type knives.

Although all countries are promoting the research and development of soft bulletproof vests with integrated bulletproof and stab-proof functions, at least at this stage, there are no products that can meet the standards of professional stab-proof clothing in terms of stab-proof performance.

The principle of traditional soft bulletproof vests is to use the process of breaking, deforming, and extracting high-strength fibers to consume the kinetic energy of the bullet, and finally make the bullet lose the ability to further penetrate, but it cannot prevent puncture from sharp objects.

Among hard bulletproof equipment, products with high-strength metal materials as the core cannot be penetrated by knives by manpower. Although there are no professional test results for ceramics, in theory, due to the fragility of ceramics, the probability that the ceramics will break during multiple strong stabbings and then the blade will pass through the cracks in the ceramics cannot be ruled out. But even if this probability exists, it is very low and can basically be considered to have no practical significance.

Can bulletproof vests protect against rifle bullets?

The current mainstream highest level (level IV under the NIJ system) bulletproof products can withstand 7.62mm high-power caliber armor-piercing bullets. In other words, sniper rifles such as the Soviet SVD and the American M40A1 cannot penetrate this type of bulletproof products when firing armor-piercing bullets.

Those that can defend against high-speed rifle bullets must have a hard bulletproof structure

The protective ability of bulletproof vests requires support from two aspects. The most basic requirement is of course that they cannot be penetrated, but at the same time, it is also required that the dent formed at the moment the bulletproof vest is hit should not be too deep. Generally speaking, the standard is limited to 44mm. If the dent is too deep, the impact and kinetic energy of the bullet will still be transmitted to the deeper tissues in the human body, causing serious bone and internal organ damage, leading to serious injuries and death.

The disadvantages of soft bulletproof vests in this regard are obvious. For high-speed, high-kinetic-energy rifle bullets, only bulletproof materials with hard structures can ensure that the impact of the bullet is evenly distributed on a larger area of the body surface, and the depth of the dent at the moment of impact is controlled within a very small range.

If the bullet cannot penetrate the bulletproof vest, can the bullet shock and kill the soldier?

Yes, the mechanism is called "blunt injury after bulletproof vest", but in most cases the degree of injury is limited, and there are very few deaths.

The ballistic body armor protects the soldier by consuming the kinetic energy of the bullet, but the maximum absorption rate is always limited (about 90% or slightly higher), and a part of it will still be transmitted to the person. Therefore, contusions of the skin, muscles, bones, and even internal organs such as the heart and lungs within a certain range and depth will occur to varying degrees; and because liquids cannot be compressed, this impact will also be transmitted along the bones and blood, which may cause a certain degree of cerebral hemorrhage.

The damage caused by this impact may usually destroy the soldier's ability to react within a few minutes, with varying degrees of severity. For example, people with strong bodies and strong wills will be less affected. It takes more than a few days for the body to fully recover. And extreme cases of such impact injuries that are serious enough to cause death are very rare. In fact, the first case was not discovered by the US military until 1969.

Will the lethality become greater if the bullet penetrates the bulletproof vest?

The lethality of the bullet depends not only on its own kinetic energy, but also on how much kinetic energy it can release to the human body. For some bullets with very old designs and too high flight stability, there is indeed a situation where after penetrating the bulletproof vest, the bullet deforms and loses stability and rolls forward in the human body, so that although a small part of the kinetic energy is lost before penetrating the human body, the speed and total amount of kinetic energy released after penetrating the human body are greatly increased, which leads to increased lethality.

However, this situation can only be established under two premises: the bullet type itself does not have a design for enhanced tumbling and killing, and the high-powered bullet type consumes very little kinetic energy when penetrating a low-protection-level bulletproof vest at close range. In fact, after World War II, new rifle bullets designed based on modern ballistic traumatology theory, including all current small-caliber rifle bullets, rely on enhanced tumbling to kill. Therefore, even if the bullet cannot be intercepted, the effect of the bulletproof vest can greatly reduce the kinetic energy of the bullet, thereby reducing the lethal effect on the human body.

As for the problem of bringing in fragments of bulletproof vests - if you are hit without wearing a bulletproof vest, a large number of other foreign objects will enter the wound. This has been confirmed by the statistics of firearm injuries in various countries for more than a hundred years.