I want to teach myself Mechanics of Materials and ask for help

You can first complete the static part of theoretical mechanics (this part is relatively simple, mainly including force analysis, force diagram, simplification and equilibrium of force system, friction, etc., and you can learn it well with the basic knowledge of physics and advanced mathematics in middle school). Then according to the knowledge points of your postgraduate major, take a look at the textbook of material mechanics, it should not be difficult, material mechanics is mainly to understand the relevant mechanical concepts and do more questions, memorize the relevant formulas, and do more related question types, you can do more.

As for going to graduate school, it mainly depends on what major you study and what topic you do, and it doesn't have to be difficult. If you are a graduate student in solid mechanics, it is estimated that it will be a little more difficult, because it also involves the knowledge of elastic mechanics, plastic mechanics, and fracture mechanics. However, it is also possible to do other topics that do not involve these mechanical knowledge.

I am a student of mechanics, and in my experience your mathematical foundation is enough, and you need some simple knowledge of mechanics in physics, which is fine in high school. If you have some difficulty learning to learn mechanics in graduate school, knowledge of material mechanics is one of the foundations of mechanics.

Theoretical mechanics requires a foundation in mechanics and a foundation in mathematics such as matrices and integrals.

Self-study is more difficult.

It's better to have a foundation in mathematics, but you have to put in a little more effort, and if you learn it well, it's not very difficult, I wish you early success.

If you are coping with the exam, it is recommended to take a good look at the book first, and then find the real questions for the postgraduate entrance examination to do, and then do other exercises.

1) Theoretical force bai

Learning is the foundation of simplicity.

The mechanics of materials is the key to learning the mechanics of the structure, so the structure of materials and the structure of the structure is the most important.

Genus. First of all, we must meditate, push the basic things in the book to figure out first, and the meaning of the formula can be clarified.

2) Skills: is to do more questions to do the after-class questions to buy a set of solutions, in fact, material mechanics is simpler than theoretical mechanics, the formulas are directly set is nothing more than to find the centroid where to use a point of geometric knowledge, other section steel checks are set of formulas bending moment diagram shear force diagram or something, to use some skills, you will know when you are familiar with the drawing, many solutions in structural mechanics are based on the bending moment diagram, and the centroid in material mechanics is the basis of the steel structure.

To be honest, mechanics is one of the more difficult courses in college.

The mechanics of materials is to meditate, to push the basic things in the book to figure out first, and to figure out the meaning of the formula.

You can also ask the seniors and seniors for their opinions.

Mechanics of materials is much simpler than theoretical plagiarism, and there are two ways to learn for reference: bai1 If you only want to pass the course completion exam

Mechanics of materials, like linear DAO algebra, is the kind of course that can be assaulted. Don't underestimate the introductory part of material mechanics, we must make clear the basic concepts of material mechanics in the introductory part, and then understand the derivation part of the torsional shear stress formula and the bending normal stress formula, and then practice a few questions. 2. If you want to rely on material mechanics to eat in the future, then you have to put in some effort, in addition to understanding the basic points mentioned above, you also have to take a good look at the two chapters of stress state and strength theory and energy method, and then you have to filter the textbook several times repeatedly, because material mechanics is more new and miscellaneous than theoretical mechanics, and it takes a certain amount of effort to memorize many things that have not been touched in physics.

Mechanics of materials is much less involved than theoretical mechanics. When learning, pay more attention to summarizing, establish a system, and understand the overall structure of material mechanics, and then learn much simpler.

There are no skills to learn well.

It's just to do more questions

I did the post-class questions.

Buy this package zhi's answer.

The material DAO material mechanics version is simpler than theoretical mechanics.

The formulas are all set of weights.

It is nothing more than to find the center of shape where to use some geometric knowledge.

Other section steel checks.

It's all a set of formulas.

Bending moment diagram shear force diagram or something.

Use some skill.

You'll know when you're done.

It is not difficult to bend moment diagram to be the focus.

Many solutions in structural mechanics are based on bending moment diagrams.

Moreover, the bending moment diagram of structural mechanics requires as little or no support reaction force as possible, and the centroid in material mechanics is the foundation of the steel structure.

So it's important.

1."Now that I am looking at theoretical mechanics during the winter vacation, and I have basically not studied engineering materials, will it affect the study of material mechanics?"

It doesn't matter if you look at theoretical mechanics or not, because in material mechanics, it's good to know how to balance energy, and of course, if you are good at theoretical mechanics, there is no harm. Engineering materials science has little influence on the mechanics of materials, and the performance parameters of some materials are listed in the textbooks of material mechanics, as well as the failure stage of steel.

2."I heard that this is difficult, what should I pay attention to, and what else do I need to prepare for this winter vacation? ”

This is a bit difficult, it is recommended that you invest more time in your studies after the beginning of school, increase the number of exercises, and think more about induction. The problems of material mechanics are nothing more than tension, compression, torsion, bending, compound deformation, strength theory, superstatic problems, and energy principles. Among them, the superstatic problem and the energy principle may not be needed as your major.

3."I haven't studied high mathematics well, I can't integrate the integral series of the reintegration curve, I will only have some ordinary integrals, and I can cope with theoretical mechanics, do I have to learn calculus again to learn material mechanics well? ”

In the case of material mechanics, general calculus knowledge is sufficient, and if you have a good grasp of calculus, it is even better.

4.This discipline is macroscopic.

General advice: If you have a lot of time during the winter vacation, you can review the calculus part of advanced mathematics a little, especially to grasp the background, ideas, and connotations of calculus. If you have time, you can buy a textbook on the mechanics of materials and read the previous chapters to gain a perceptual understanding.

Good luck. If you think it's good, take it.

Material mechanics are useful! Mainly learn tension compression, bending, torsion, shearing and their mixing problems. There is also a little bit of stress state analysis and so on.

You should review at home what you can't make up for and then look at the future study, I think this subject is as macro as physics and theoretical mechanics.

When stretched and compressed, does mild steel have the same yield point? Are the strength limits of cast iron the same? Why?

A: There is no comparison!

1. The yield point is an index that only exists when stretched. So problem 1: Tension and compression are not comparable, because there is no yield point when compressed.

2. The yield point is an index of steel, and cast iron is not steel, so there is no index of yield point, and of course it cannot be compared.

When the steel or specimen is stretched, when the stress exceeds the elastic limit, even if the stress no longer increases, the steel or specimen still continues to undergo obvious plastic deformation, this phenomenon is called yield, and the minimum stress value when the yield phenomenon occurs is the yield point.

Please remember to adopt it in time, thank you!

When you see the actual engineering structure and force state, when you can quickly simplify the basic model classified into the material force, no matter how complex the problem is, it will become concise, just like the polynomial operation in mathematics, no matter how long the formula, there are only four means to do it - addition, subtraction, multiplication and division, a small operation, it is a small calculation to form a large formula. Material strength is like this, thinking about all the problems at the same time, it is estimated that only the rain man can do it accurately. A force that is just a symmetrical axis is divided into an axial force and a bending moment of the resultant force, these two basic models can be solved by a formula, and then they are added by a formula, and a strange-looking force model becomes a typical entry-level model.

The details are as follows: First, check the literature to see the current development of material mechanics, which will be very helpful for future work and research.

The second is to learn software, such as finite element software in material mechanics, in solving practical problems, hand calculation is almost impossible, must use the help of computers.

The cross-sectional area of the <> rod is used for strength calculation: 1=f1 a1=-8 60=negative sign indicates compressive stress); 2 = f2 a2 = 16 120 = tensile stress). There is no requirement for this question.

It's obviously a super-static problem, but how can the reaction force be 0 in conjunction with it, it's amazing.