What is the significance of a trillion fatigue life?

I'm not afraid to scare you when I say it, it makes a lot of sense!

Any metal has a fatigue life, for example, the most common wire, if you fold it ten times repeatedly, then the fatigue life of this wire is 1x10. Pen ~ fun ~ pavilion www.biquge.info

However, memory alloys such as nitinol have a much higher fatigue life. If such an expensive thing breaks down after a few uses, what is the manufacturing value?

Therefore, medical devices made of nickel-titanium alloy, which is generally the most durable, generally use the fatigue life of about 10 million times.

In other words, the world's existing memory metals with high quality can switch between the parent phase and the R phase about 10 million times.

The service life of this level can basically meet the conditions of use.

Why basic?

For example, taking nitinol alloy in the medical field of the most used field - nitinol wire for orthodontics, taking into account the growth process of children, the general service life only needs to reach a few years, and the teeth can be removed after orthodontics.

However, some nitinol stents similar to those used for cervical and lumbar skeletal correction may not be able to meet the needs even if the service life can reach 10 or even 20 years.

This is clearly not enough for the average life expectancy of humans.

This kind of orthodontic equipment is to be surgically implanted into the human body, and as long as the service life is up, it must be removed and replaced again.

The device attaches to the human skeleton for a long time, which can cause different degrees of deformation of the bones or adhesion of tissues such as muscles. Therefore, the difficulty of replacement surgery and the harm to patients are undoubtedly huge.

So from this point of view, even tens of millions of fatigue lives are far from enough.

But what about a trillion times?

What is the concept of one trillion? Even if it is used 10,000 times a day, it can have a service life of up to 100 million days.

One! billion! day!

3287671 months!273972 years!

How many years has the history of human civilization been?

If this alloy piece in Li Fanyu's hand can be made into a bone fixator and implanted into a patient's body. This means that even if the patient lived from the time of the caveman to 3000 AD, more than 90% of the life of this bone fixer remained!

One trillion, in a sense, is equivalent to eternity!

Li Fanyu looked at the inconspicuous silver piece in the palm of his hand, and couldn't wait to engrave the inscription and stuff it into his body - this is the real meaning of immortality!

Thinking of this, he hurriedly put the iron piece into his pocket like a baby, picked up the lock to lock the material laboratory, and returned directly to the company.

Zhengxin Laboratory.

The three scholars looked at Li Fanyu with a show off look, and gave a "this is a stupid beep" expression in unison.

A trillion times?

Ha!

We don't read much, don't lie to us.

Liu Qing picked up the alloy sheet in Li Fanyu's hand with two fingers, put it to his mouth and blew. The originally straight alloy sheet reaches the deformation temperature and magically becomes an arc.

"Tsk... Brother Fan, there is a similar kind of magic spoon on Taobao for this thing, blanched with boiling water, put it there for a while, and straighten. You're this... Except that the phase switching temperature is a little lower, I really don't see any difference with that. ”

Hearing him say this, Xu Fufang also touched his chin and pouted, "Well, I feel the same." Brother Fan, you can't be fooled by others, right? A trillion times of fatigue lifespan is probably not attainable with the current level of science and technology. And let's not talk about it if we can't reach it, the key is what is the use of this thing for us?"

Zhang Yu mends the knife every day, "Correct solution." ”

Li Fanyu is like being splashed with a basin of cold water, fog grass... Oh, yes... What's the use...... I seem to be making cars instead of medical devices......

Take it and sell it for money?

Nima could see from the reaction of the three scholars, if he went to which hospital to say that this thing could be perverted a trillion times repeatedly, I was afraid that he would be directly admitted to the psychiatric department!

He scratched his head, "What's the use... I was born to be talented... Will it work?"

"Cut !!"

The three scholars all made a contemptuous gesture, and turned around directly.

Leaving Li Fanyu messy in the wind.

He put away the alloy sheet depressedly, damn, it seems that he has been slammed by Xapp again, Nima Jing made these tall but useless things, and he was angry with the master!

At this time, Wang Rui, who had two big black circles under his eyes, walked over with a cup of hot water. He was so sleepy that he looked like a night wanderer, and he didn't see Li Fanyu in front of him, and the two of them collided directly with a full arm.

Li Fan let out a foolish sigh, and the alloy sheet in his hand fell. Coincidentally, it landed on the puddle of hot water that had been spilled on the ground.

The alloy sheet deforms rapidly when heated.

"Hey, isn't this a memory alloy?"

Wang Rui picked up the small pieces on the ground, and after leaving the heat source, the alloy pieces instantly returned to normal.

He snorted lightly and asked, "Brother Fan, where did you get it?"

Li Fanyu patted his chest, "Our company produces it ourselves!"

Wang Rui used a pair of panda eyes to stage an animal-world version of contempt, "net bragging,"

Looking at Li Fanyu's embarrassed face, he played with the alloy sheet in his hand, as if talking to himself: "I have studied this thing, and I said that we believe it, it is the Academy of Aerospace Sciences, and it is a small game with a stretch of less than 20% such as orthodontic silk and vascular stents." You shouldn't be able to do this in China. ”

Roar?

Is there really anyone who knows how to do it?!

Li Fanyu immediately stepped up, "Hehe, awesome, right? Let me tell you, the fatigue life of this thing can reach a trillion times!"

"Hey... Brother Fan, people can't be inflated, it turns out that you just love to pretend to be forced, why are you still in the habit of bragging? You can't read that book "Automobile Black Technology", right? Don't learn from that stupid tea author!"

When did I learn from him!

Li Fanyu instantly had the urge to explode the husky, and a mouthful of old blood was held in his throat.

Before he could go crazy, Wang Rui continued to mutter: "It would be nice if this game could really have such a long fatigue life, whether it is placed on the body of a car or on an airplane, it is a treasure." ”

Li Fanyu's eyes lit up, and he said, "How do you say this?!"

"Take the wing of an airplane, for example, the flaps and aileron control surfaces of the current wing are connected by hinges. Although the hinge is good, the hinge is not smooth, which leads to premature separation of the air flow through the wing, and the aerodynamic efficiency is low. The greater the deflection angle of the control surface, the more noticeable the performance degradation becomes. If the hinge can be replaced by memory alloy wire to achieve the control of flaps and ailerons, the airflow problem can be solved and the deflection angle of the control surface can be maintained to the greatest extent. ”

Oh?

I don't understand it, but it looks amazing!

But...

Li Fanyu wondered: "Isn't there a memory alloy at present, why can't it be used on the wing?"

Wang Rui shrugged his shoulders, "The durability is not good, after all, the plane flies in the sky, and the flaps and ailerons are adjusted a lot of times." In the case of required strength, it is difficult for memory alloys to achieve tens of millions of fatigue lifetimes. And the alloy wire is not like a hinge, it can distinguish the degree of wear with the naked eye, if the alloy wire breaks in the sky, wouldn't it be a big deal?"

Oh!

Li Fanyu secretly wrote it down, and then asked, "What about the car, and what can this thing be used for?"

Wang Rui let out a long yawn and picked up the water cup on the ground, "The simplest, the air intake."

Looking at Li Fan's puzzled look, he popularized: "Didn't Mercedes-Benz release a concept car before, the kind with an adjustable grille in front of the car?"

Li Fanyu nodded, indicating that he knew - it was specially designed for Formula 1 cars.

"Why do you need to adjust the angle of the air intake? Isn't it just to keep the engine compartment at a certain temperature, when the car is just started, the air intake grille is closed, and the cabin temperature rises rapidly, so that the engine can enter the working temperature as soon as possible. At high speeds, the grille is fully open to allow maximum heat dissipation from the engine. ”

It is said that this device cost Mercedes-Benz more than 200 million US dollars, and a separate system was developed and implanted into the ECU, using sensors to control the mechanical group to adjust the angle of the air intake. It would be much easier to use memory alloy, just use memory alloy as the cabin cover and set a temperature. For example, when the engine is lower than 200 degrees, the nacelle cover is closed in the mother phase to maintain the engine operating temperature. When the hatch is higher than 200 degrees, it becomes the R phase, and it automatically becomes an air intake opening to dissipate heat from the engine, isn't it beautiful, practical, and forced..."

Before he finished his thoughts, he saw Li Fanyu turn around and run away.

The guy was holding the thermos cup that had fallen out of the pit, with two big black circles under his eyes, and stretched out his hand and muttered, "Hey Brother Fan, why are you going?"

"I'm going to do the !! of the engine cover" (To be continued.) )