The Literary Life of a Science Leader

Chapter 71 Killing the 'Dog'

Mu Jingchi is not very good at fracture mechanics, and he is not familiar with the subject of fracture failure.

The materials also didn't say that one method works and all methods work, so Mu Jingchi could only find the problem slowly.

"Okay, let's engage in aviation."

This is Zhang Chuyang's own subject. Although the focus of the subject is still the direction of material fracture and failure, Zhang Chuyang chose aviation materials, which are suitable for large aircraft.

Zhang Chuyang scratched the back of his head when Mu Jingchi said that, "Try it."

Seeing that Mu Jingchi, who was not as good as himself in the past, has become the person in charge of national research projects, Zhang Chuyang naturally wants to rise up.Mu Jingchi started with car engine materials, so Zhang Chuyang started with aviation materials.

Of course, not aero-engine materials.

Materials suitable for aero-engines are more complex and demanding than automotive engine materials, and are not at the same level.

Mujingchi pursues upwards, that is, the expansion module of the application.

Abaqus provides a powerful tool for simulating crack growth along arbitrary paths independent of cell boundaries. This module can be combined with other capabilities of Abaqus to predict the durability and damage tolerance of aircraft material structures.

May also assist in the evaluation of crack initiation and growth in pressure materials.

"No problem here."

Mu Jingchi looked at these data, and the result was indeed something wrong, which was far from the theoretical analysis.But there is no problem in the step where the software runs to get the data.

"Is there something wrong with the mathematical model?"

In terms of software operation, Mu Jingchi didn't find any problems. This kind of situation is still rare, so he raised other conjectures.

"Look at it."

Zhang Chuyang continued to call up the data, and using these data supplemented by computer calculations, a mathematical model could be derived.

"There's something wrong with the data here."

There is nothing wrong with the model at first glance. From the point of view of structural mechanics, the numerical values ​​appear to be normal, and occasional errors are allowed.

But going back to the data from which the mathematical model was calculated, Mu Jingchi immediately discovered the problem.

"No problem? I have done the calculation many times."

Zhang Chuyang lowered his body and looked at the data problem pointed out by Mu Jingchi seriously, with some doubts.

Mu Jingchi shook his head, "How do you calculate?"

Not all calculations are left to the computer, and many are performed by oneself using mathematical methods.

"You see, it shouldn't be calculated like this here. Although the SN curve and fatigue limit of metal materials are calculated accurately, this is only one aspect..."

"And here, according to Karl's first theorem, the rate of change of the strain energy of an elastic member to the displacement corresponding to a certain load on the member is equal to the value of the load. The value is indeed no problem, but it is different from The stress-strain curves of the materials don't match..."

"Finally there are catastrophic stresses and stress-time histories . . . "

What Mu Jingchi said is all about the mechanics of materials, which is exactly what he has been studying these few nights.

"Although these are small problems, they affect the mathematical model, and the model deviates from the theoretical analysis, which then leads to obvious errors in the final output data."

All kinds of knowledge are intersected, especially for mechanics.Obviously, Zhang Chuyang has made great progress in fracture mechanics. It can be said that Mu Jingchi does not understand many aspects at all, but Zhang Chuyang has not done a good job in integrating and synchronizing materials mechanics and fracture mechanics.

Some detailed issues are considered here, but ignored there, lacking detailed links to sort out.

"exactly!"

After Mu Jingchi said this, Zhang Chuyang immediately reacted, "Hey, there are too many things recently, and I am too busy, so that I even ignore this basic question."

Zhang Chuyang didn't encounter this kind of problem when he participated in the department's project before, because someone finished it for him, and other senior brothers and sisters found out when he encountered problems.

But this is his own subject, he has to do everything by himself, and various problems will inevitably arise.

Fortunately, this is the initial period of the project, and it is good to solve the problems encountered. The fear is that there is no solution to the problem, or even the cause of the problem.

"Look out, don't worry, scientific research is hard work, and it's a good thing if there are problems."

···
When Mu Jingchi opened the door, he saw a picture of killing a dog.

The dog that was killed was none other than Mu Jingchi.

Lao Mu and Lao Ji were busy in the kitchen together. When the door opened, it was time for Lao Ji to feed Lao Mu, but Lao Mu didn't want to turn around, so Lao Ji bit his mouth directly. Then he kissed and fed it.

The sound of the door opening was not loud, and both of them were immersed in the sweet atmosphere of the kitchen, so they didn't notice it at all.

cough!
It wasn't until Mu Jingchi coughed intentionally that the old couple came to their senses and separated immediately.

"When I came up just now, I happened to meet Aunt Zhao next door. We also happened to buy some fresh ingredients. I sent her over to try something new."

After saying that, Lao Mu didn't care what Mu Jingchi's eyes looked like, he just picked up the bag of vegetables on the kitchen table and went out.

Mu Jingchi was speechless for a while.

The bag contained pork. Although the price of pigs has risen, people who can afford houses in this community should not be able to afford pork.

Perhaps, this is Netease's black pork?
Mu Jingchi shook off the messy thoughts in his mind, and looked at Lao Ji.

Well, as expected, men are thicker-skinned than women. My mother found an excuse to run out in embarrassment, but my father didn't react at all and continued to work in the kitchen.

Seeing Mu Jingchi looking over, he said, "The food will be ready soon, go sit on the sofa for a while."

Mu Jingchi nodded, hung up the backpack, put the keys away, put on slippers and walked into the living room.The TV in the living room was on, but the person sitting on the sofa was not watching TV at all, but was playing a mobile game.

Go over and take a look.

Di Renjie has 7 kills, 0 deaths and 8 assists.

Ji Lingling quickly turned her head to look at Mu Jingchi, then turned her head to continue her glorious career, "Brother, you're back!"

"Ah."

Mu Jingchi didn't intend to watch the game, but regarding Ji Lingling's previous thoughts, he still wanted to know the result, "Did Dad agree to your live broadcast?"

"I have agreed, and I am selecting a computer for the live broadcast."

Ji Lingling's eyes were still on the phone screen, but she still nodded when she heard Mu Jingchi's words. "By the way, brother, I think the computer in your study seems very luxurious. Do you have research on computers? Help me get a set!"

Although "Glory of the King" is being broadcast live now, it will not be good in the future, so it is best to have a dedicated computer for live broadcast.

"CPU: AMD 3900X, motherboard: X570 ACE, graphics card: RTX 2080ti, memory: Zhiqi DDR43600 frequency 8Gx4 Mirage; solid state: Hikvision C2000 pro 2T, power supply: Zhenhua leadex 1000W, chassis: Lianli Gemini, Display: Asus ROG Donkey Kong."

Mu Jingchi opened his mouth and threw out a configuration table. In order to save trouble in the future, he directly gave Ji Lingling a flagship configuration. Anyway, he was not short of money. As for the higher 3950x, he couldn't buy it, and it was out of stock.

　Ask for a recommendation ticket, the day it is put on the shelves is the time when the two more beasts evolve! ! !

　　


(End of this chapter)