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Mechanics of Materials. Subject**: 801
Applicable Professions: Mechanical, Vehicle, Civil Engineering.
Examination method: written test.
Total score: 150 points.
Exam Scope:1Tension, compression and shear.
The concept of axial tension or compression, stresses in cross-sections and oblique sections, deformation in axial tension or compression, Hooke's law, mechanical properties of materials under axial tension and compression, safety factor, strength conditions, simple tension and compression superstatic problems, practical calculations of shear and extrusion.
2.Torsion.
Circular shaft torsion concept, stress in cross-section during torsion of circular shaft, torsional deformation of circular shaft, shear Hooke's law, torsional strength and stiffness calculation.
3 Geometric properties of plane figures.
Definition of static moment, moment of inertia, product of inertia, centroid position.
Parallel tilt-shift formula for moment of inertia and product of inertia, the concept of centroid main axis.
4 Bending internal forces.
The concept of plane bending, shear force equation and bending moment equation, shear force diagram and bending moment diagram, differential relationship between load concentration, shear force and bending moment.
5.Bending stress.
The application of normal stress, shear stress calculation formula and strength condition on the cross-section of the beam in pure bending and transverse bending.
6.Bending deformation.
Deflection curve differential equation, bending deformation by integral method, bending deformation by superposition method, simple static indefinite beam.
7.Stress and strain analysis, strength theory.
The concept of stress state, two-way stress state analysis uses analytical method to find the stress, principal stress, principal direction and maximum shear stress on any oblique cross-section; Generalized Hooke's law and its comprehensive application, four commonly used strength theories.
8.Combined deformations.
Calculation of deformation strength of combination of tensile (compression) and bending, and combination of torsion and bending.
9.Energy Method.
Calculation of member deformation energies, unit load method, graph multiplication method for calculating Mohr integrals.
10.Superstatically definite structure.
The concept and degree of superstatic, the use of force to solve superstatically determined structures, and the use of symmetric and antisymmetric properties.
11.Dynamic loads and alternating stresses.
Dynamic load coefficients, stresses and deformations of members when they are impacted. Cyclic properties of alternating stresses, stress amplitude and average stress, durability limit and durability limit curves.
12.The pressure bar is stable.
The concept of compression bar stability, the calculation of the critical stress of slender and medium-long rods, the scope of application of Euler's formula, and the verification of compression bar stability.
Description:1The types of questions include: multiple-choice, fill-in-the-blank, and calculated.
2.Proportion of question types: multiple-choice and fill-in-the-blank questions (45 50 points), calculation questions (100-105 points).
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Introduction to 801 Mechanics of Materials and 865 Mechanics of Materials is a book called "Mechanics of Materials and Materials".
There are also separate books on "801 Mechanics of Materials" and "865 Mechanics of Materials". Each school will choose different textbooks at the undergraduate education stage, some of which are versions of higher education societies and some of which are versions of Tsinghua University. Therefore, what version of the textbook is used by the school you apply for, then the questions of the 801 exam will be different.
Mechanics textbook. Let's start with the mechanics books. Our Department of Mechanics is known as the four major mechanics:
Mechanics of Materials, Structural Mechanics, Elastic Mechanics, Plastic Mechanics (according to the advanced way, theoretical mechanics is a foundation, but it is still quite difficult to learn, I think as long as you understand the concept of balance, this course can not be studied, because it has less to do with engineering structures, so it is not listed). When introducing specific books, I will only list one book, because all the theories are the same, and you can only eat one classic textbook.
Mechanics of Materials", Sun Xunfang, Fang Xiaoshu, Higher Education Press. This is a good textbook and worth perusing.
Structural Mechanics, Long Yuqiu, Bao Shihua, Higher Education Press. Structural mechanics is in a biblical position, and our mentor has asked us that when you see the structure, you should have a rough idea of its force and deformation, which requires a strong foundation of structural mechanics to support.
Elastic Mechanics", Xu Zhilun, Higher Education Press. This textbook is a bit old, and the writing is a bit obscure, but a textbook written by Mr. Xu many years ago, Wu Chun is still using it today, and its degree of classicism is beyond doubt.
Elastoplastic Mechanics", Chen Mingxiang, Science Press. If you think that the last book of elastic mechanics is more difficult, the first half of this book of elastic mechanics is elastic mechanics, which is very well written, but unfortunately it is relatively concise, and it is partial to mathematical theory (but mechanics becomes mathematics when it goes deeper.) The plastic mechanics section of the book is both concise and thorough, making it an ideal textbook.
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On the ** on sale, Chinese Academy of Sciences Mechanics of Materials 807 is this, I hope it will help lz.
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Review Method:
1. Take the textbook as the foundation, take the syllabus as the outline, and eat the textbook thoroughly. The exam questions must be based on the specified textbook, not the teaching materials of a certain publishing house. Almost 100% of the usual exam questions can be found in textbooks – of course, after multiple layers of synthesis and deepening.
2. Write the book three times. The first time should be based on the overall browsing, and strive to understand the summary of the whole book, and do not require understanding of each specific knowledge point; The second time to carefully sort out the key and difficult points; The third time is to reorganize and memorize the knowledge points. After doing this three times, the book is basically read.
3. The book is almost finished, and the knowledge system is sorted out, so let's start working on the questions. We must grasp a principle when doing questions: first seek refinement, and then seek more; Seek slow first, then seek fast; Seek quality first, then quantity.
4. Memorize the topic. The so-called memorization is a more vivid statement, which does not mean that you must memorize the entire topic. Instead, after doing it, put the workbook that I had done. The test papers and so on are saved and taken out at regular intervals in the future.
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Are you sure it's not 925? I also take the mechanics of materials.
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