As we all know, dislocations are divided into three categories: edge-shaped dislocations, spiral dislocations, and mixed dislocations.

Blade dislocation is divided into positive edge dislocation and negative blade dislocation, spiral dislocation is also divided into left-handed and right-handed, in addition to mixed dislocation, there are a total of five types of dislocation, and the shape of the specific dislocation line and the projection of the atom are diverse.

There are five types of Thompson's dislocation theory, which correspond to the five types of dislocation, and then use the dislocation equation as the core to build the entire dislocation system.

The dislocation theory that Mu Jingchi has come up with now is the theory of the positive edge dislocation.

In 2069, the study of dislocations will be deepened, and the study of positive edge dislocations will be dissected, making them more complex than they are today.

The structural definition of the positive edge dislocation spreads, and many local slip patterns that have not yet been discovered are classified as the positive edge dislocation.

As the person in charge of the project, Mu Jingchi naturally also wants to conduct project research, and it is the focus.

Because he was very familiar with this theory, he directly began to study in the way of aluminum alloy, after all, Mu Jingchi is now more experienced in aluminum alloy.

Other master's students can only start their research with general metal materials.

To put it simply, it is to obtain massive and detailed data through material experiments and experimental observations of dislocations, and then find a line to clarify the relationship between various dislocations in this massive data.

And this line is the first step of the Touch Theory I.

However, to find such a connection line, it can be said that it is extremely complicated, and there is basically no way to take advantage of it, experimental testing combined with mathematical and physical methods, theoretical analysis and mathematical calculations.

Dislocations are very complex, and a material experiment can obtain a large amount of data.

Among them, there are data on dislocation density and crystal deformation rate, data on dislocation density and crystal strength, data on stress field, elastic energy, line tension, data on the interaction between dislocations, data on the force that causes dislocation slip, data on the starting force of dislocation, value-added data of dislocation, and data on dislocation delivery, etc.

Such material experiments often require hundreds, thousands, or even tens of thousands.

Sometimes the simulation is perfect, as if everything is going through, but when the actual experiment is carried out, it will fail inexplicably.

The accumulated data cannot be thrown away, and it also needs to be analyzed.

In these massive data, Mu Jingchi also eliminated the data about other types of dislocations, and specialized in the data of positive edge dislocations.

It can be said that this is an extremely difficult, complex and boring study.

And this is only the first step of Theory I., which is to really understand the root cause of the positive edge dislocation, and then to control the positive edge dislocation, which is the key point of the point.

···

Time goes by.

"That's it for today!"

Mu Jingchi finished his experiment, took off his white coat, and said to the other graduate students. Wearing a white coat means serious, responsible, and rigorous, giving people the image of a scientist and a sense of security.

"I don't take up your time and energy, and you can start working on your own projects. Mu Jingchi had a shallow smile on his face, "If you have any questions about your own subject, you can come to me." ”

When students are in graduate school, it is normal for them to encounter difficulties in their own projects and papers.

But sometimes, the graduate supervisor doesn't care about these things, and is not responsible for solving the problem, but the student is groping to solve it by himself, either using experimental methods to check, or scanning the literature to check the data.

As a result, it takes up a lot of students' time and energy.

Mu Jingchi pulled them into his own project team, and this is where he can be a little better than other mentors. He has a deep amount of knowledge and a heart to help solve students' problems.

Seeing that Mu Jingchi, the person in charge of the project, left the research laboratory first, the four master's students all looked at each other, a little confused, and then all looked at Ai Xiaosheng, who was more familiar with Mu Jingchi.

Although Huaqing University has a better scientific research environment than other schools, they did not expect this to be the case! The time is now half past five, which is the time for dinner, and it is also the time for outside units to get off work.

But there is absolutely no scientific research project team that has ended the experimental project at this point in time, and the instruments and equipment are still running?

If you are not busy until eight or nine o'clock in the evening, can you say that you are engaged in scientific research?

Even some project teams can be delayed until eleven or twelve o'clock at night, compared to the material research that makes people bald, the 996 of those Internet companies is really a blessing.

"If the equipment is still running, wait for the results to come out and leave; if you don't use the equipment, now divide the experimental steps, store the data, save the mobile hard disk, and the network disk, and then you can leave." ”

As the deputy of the project, Ai Xiaosheng naturally knew Mu Jingchi's habits, and dispelled the concerns of these graduate students.

"Don't worry, this is Dr. Mu's habit. Ai Xiaosheng also smiled, "The Z325 aluminum alloy project team that Dr. Mu was in before, he left at this point, but this does not affect people's scientific research capabilities." ”

···

"Pool, wait. ”

Mu Jingchi, who was walking through the corridor of the Material Research Building and was about to leave, was stopped by a familiar voice, it was Zhang Chuyang.

turned around and looked at Zhang Chuyang with puzzled eyes, "What's wrong?"

"Come and see with me, there's something wrong with my data. Zhang Chuyang came over and pulled Mu Jingchi into his laboratory, where instruments and equipment were running.

"I always felt that something was wrong with this data, but I didn't know what was wrong. ”

Mu Jingchi followed Zhang Chuyang's guidance and looked at the screen, on which was the ABAQUS 6.20 software, which displayed multiple data about the fracture and failure of the material.

ABAQUS is a powerful finite element software for engineering simulations that solves problems ranging from relatively simple linear analyses to many complex nonlinear problems.

It includes a rich library of cells that can simulate arbitrary geometries. It has a library of various types of material models that can simulate the performance of typical engineering materials, including metals, rubbers, polymers, composites, reinforced concrete, compressible hyperelastic foams, and materials such as soil and rock.

ABAQUS software is dedicated to complex and in-depth engineering problems, and its powerful nonlinear analysis capabilities are widely recognized by the high-end user base of design and research.

Zhang Chuyang's fracture failure problem naturally uses this finite element software.

"It's a bit of a problem. ”

There is a lot of material research, and some relevant data has a general feeling or intuition at a glance, and Mu Jingchi feels that there is indeed a problem with the data.