1959: Carrying the achievement system, she rolled

There are also many testing standards, requiring the use of different types of guns, bullets of different calibers, and shooting tests from different distances.

Especially the protection of core parts is the most important.

Prior to this, the test results for properties like wear resistance, fire resistance and water resistance were very good.

As for the humidity test?, weight and comfort test?, the results are also very encouraging.

Especially in the shock wave test, it still maintains its protective performance in such an extreme environment as an explosion, which is enough to prove its excellent performance.

Without the final test, she couldn't guarantee that Wan Ping would be safe after wearing the bulletproof vest.

His life or death is none of her business. She just doesn't want Secretary Wan to lose his son, whom he had found with great difficulty. This would be too cruel for Secretary Wan!

"Xiao Du, can we use a dummy to test the real effect?" Director Wei asked worriedly. Their National Defense Science and Technology Commission has quite a few operatives, and they have people from all walks of life.

The testing of bulletproof vests concerns the safety of so many people, so he has to be cautious.

Director Song felt his hair stand on end. What did Director Wei mean by this?

Do you want to test it with real people?

It was also the first time he discovered that his leader was a man who took human life lightly!

"Don't worry, Director Wei. The dummies used in the tests are made of special materials, clay similar to human tissue. They are used to detect the depth of the depression in the test, so as to assess the potential damage to the human body." Du Yimeng explained quickly.

"Well, very good!" Director Wei nodded with satisfaction. He said that Xiao Du was reliable and had thought of every aspect.

Du Yimeng was just about to put the bulletproof vest on the dummy when she saw Director Wei looking at the bulletproof vest in her hand with a sharp gaze.

"Director Wei, how about you come over?" Du Yimeng handed over the bulletproof vest in her hand, and then she saw Director Wei's eyes light up.

Director Song, who had just opened his mouth, closed it silently. At this moment, he was thinking about one thing. He had just been the dean for a few days. How many more days could he hold on?

He and Lao Liu are indeed brothers. Lao Liu has been thinking about quitting his job as logistics director because he can't do it anymore.

He was worried that he would be caught up, so he lost confidence and didn't want to do it anymore.

"Is it suitable?" Director Wei's eyes were full of eagerness, but he spoke very modestly.

Du Yimeng used her actions to show Director Wei what appropriate meant, as she taught Director Wei step by step how to put the bulletproof vest on the dummy.

Participation is not important, the important thing is to have fun.

Zhuang Xiang looked at Du Yimeng with sparkling eyes. His mother said that polite children have a future, and he felt that people who understand the ways of the world have a better future, like her!

Director Song was completely confused. How could you compare with someone who is more capable and worldly-wise than you?

"Xiao Du, is this okay?" Director Wei asked, feeling very happy about this sense of participation. Since his position has been rising, he often feels lonely. Maybe it's just that it's lonely at the top!

Du Yimeng said nothing, but silently gave him a thumbs up, which made Director Wei laugh.

Who could refuse this special treatment, which affirmed his abilities?

The next step was to enter the test firing phase. However, before that, Du Yimeng explained to everyone the working principle of the bulletproof vest like a commentator.

She wanted to explain just now, but was interrupted by Wan Ping, so he was only suitable to stay in the laboratory.

The bulletproof vest is made of a combination of multiple layers of materials to absorb and disperse the energy of bullets. Its outer layer is a lightweight ceramic plate, and its raw material is the boron carbide used to make the protective armor on the Type 64 tank.

After high-temperature treatment, the ceramic plate will become a regular crystal structure, thereby increasing its hardness and impact resistance.

Then, a new material with excellent energy absorption capacity is applied as the inner layer. Under high pressure and high temperature, the multiple layers of material are bonded together to form a composite bulletproof layer.

"Xiao Du, why don't you replace the ceramic plates with steel plates?" Director Wei frowned slightly. Everyone knows how expensive composite armor made of ceramics is.

Not only is the new material extremely expensive, it also has a shelf life of only five years. When two expensive materials are used together, you can imagine how high the cost of a bulletproof vest would be.

So he couldn't equip all the operatives with one because the money didn't allow it!

"If steel plates are used as the first layer, although they can withstand bullets, they will cause serious damage to the internal structure." Du Yimeng explained that she had decided to use ceramics from the beginning.

However, she still conducted experiments on steel plates, and the experiments proved that her idea was correct.

"It's like an iron ball thrown into the sky. If we reach out to catch it directly, our hand will feel pain. But if we move our hand down to cushion the impact at the same time, the degree of injury will be reduced, and the ceramic plate can act as a buffer." Du Yimeng saw Director Wei's eyes were blank and explained again.

Director Wei nodded. The old saying was true: cheap goods are not good. Then he gestured for her to continue.

"When ceramics are hit by bullets, they will break. At the same time, they will absorb the penetrating kinetic energy of the projectile to slow down the penetration speed of the bullet. Then the new material will further absorb the remaining energy, and finally play its protective role." Du Yimeng said, and then she talked about some advantages of bulletproof vests.

This composite bulletproof vest is much lighter than the hard bulletproof vest she made before, and allows her to move freely after wearing it.

It can protect people's safety without affecting their movements. It is simply a protective artifact.

"Are bulletproof vests disposable items?" Director Wei asked with a lucky mentality, and then he looked at Du Yimeng with anticipation.

Others felt the same way after hearing this. If it was a disposable consumable, they could just give up after testing it because the current financial resources simply didn't allow it.

"No, although the bulletproof vest will be damaged after being hit by a bullet, it can be reused by replacing the damaged parts." Du Yimeng explained.

Everyone breathed a sigh of relief. What they feared most was disposable consumables. To put it bluntly, it was all due to poverty.

"Give me the gun." Director Wei said that he wanted to test it by shooting himself. As Xiao Du talked more and more, he became more and more excited, but he had no money!

Director Song was very perceptive and handed the Type 56 semi-automatic rifle to Director Wei.

Its initial velocity is 730 meters per second. As long as it passes the test, it can withstand the Type 54 and Type 64 pistols, because the former is 420~440 meters per second and the latter is 310 meters per second.

After Director Wei took the gun, he turned on the safety, aimed and fired, all the actions were done in one go.