The teaching outline of engineering mechanics is suitable for three-year mechanical design, manufacturing and automation, hydraulic technology application and mechatronics. Total hours: 75 hours, including 69 hours for theoretical teaching, 6 hours for experimental teaching, and 4 points for academic performance —— Author of Teaching and Research Section: Liu Yaohu Date of writing: May 2003, 10 1. The Nature, Purpose and Task of the Course Engineering Mechanics is a theoretical basic course for the majors of mechanical design, manufacturing and automation, and hydraulic technology application in higher vocational colleges. And be responsible for connecting the past with the future in the whole teaching process. This course provides necessary mechanical knowledge and basic theory for the following courses: mechanical design basis, mechanical manufacturing basis, mechanical processing engineering, hydraulic transmission technology, etc. Through the study of this course, students can deal with simple engineering practical mechanics problems; At the same time, learning engineering mechanics can effectively cultivate students' logical thinking ability and promote the overall improvement of students' comprehensive quality. The teaching object of this course is the students of higher vocational colleges who graduated from three-year high school and majored in mechanical design, manufacturing and automation, hydraulic technology application, mechatronics and so on. This course is a compulsory course. Second, the teaching content, basic requirements and class hours distribution of the course meet the requirements of the teaching plan of three-year mechanical design, manufacturing and automation, hydraulic technology application and other majors in higher vocational colleges. This course mainly teaches statics, basic deformation and strength calculation of components, stability of compression bar, kinematic basis, fatigue strength of components, etc. After completing this course, students should meet the following requirements: l Understand the basic concepts and laws of mechanics, master the basic knowledge and theory of engineering mechanics and the basic methods to deal with engineering mechanics problems, and have the ability to solve simple practical engineering mechanics problems. I can do mechanical analysis and static calculation. L can correctly apply the formula to calculate the strength, stiffness and stability of components with less complicated stress. Teaching content, basic requirements, allocation table of class hours, basis of teaching content, force analysis of objects during learning, basic concepts and axioms of 8 1 statics, and understanding the basic concepts and axioms of statics. 2 2 Constraints and Constraint Reactions Master the drawing of common constraint reactions. 2 3 Mastering the drawing method of stress diagrams of objects and simple object systems through stress diagrams. Analysis method of synthesis and balance of basic force system 64 intersecting force system Understand the projection on rectangular coordinate axis and resultant force projection theorem. 2 5 torque couple understands the concept of torque and the theorem of resultant torque. Understand the concept, properties, synthesis and balance of coupled systems. Translation Theorem of General Force System 106 Force Translation Theorem for Simplified Understanding of Plane Arbitrary Force System. Understand the simplification of plane arbitrary force system and its simplification results. 2.7 Balance Equation of Plane Arbitrary Force System Mastering the Balance Equation of Plane Arbitrary Force System and Its Application. 2 8 Balance of Object System Grasp the solution of the balance problem of simple object system. Understanding the Plane Solution of the Balance Problem of Arbitrary Force System in 2 9 Space 2 10 Friction and self-locking Grasp the calculation of sliding friction and understand the concepts of friction angle and self-locking. 2 Basic knowledge of bar deformation 2 1 1 basic assumption of deformed body; Understand the basic form of bar deformation; Understand the basic assumptions of deformed solids; Understand the four basic deformation forms; 2 Understand the concepts of axial tension and compression; 10 12 to understand the internal force in axial tension and compression; Understand the concepts of axial tension and compression; Master profile method; Axial force and axial force diagram 2 13 stress in axial tension and compression; grasp the deformation of tension and compression bar and Hooke's law; grasp the stress calculation of section and inclined section 2 14; understand the mechanical properties of materials in tension and compression; understand the experimental equipment in tension and compression experiments; master the determination of mechanical properties of low carbon steel and cast iron; 2. Understand the concept of allowable stress; Master the strength condition and its application; 2. Understand the concept and actual calculation of shear and extrusion 316; Understand the actual calculation of shear and extrusion; 3. Understand the concept and torque of round shaft torsion Figure 917; Understand the concept of circular axis torsion; Master torque and torsion. Bending moment diagram 2 18 stress and deformation on the cross section when the round shaft is twisted; 3. Understand the experimental equipment in torsion experiment, and observe and analyze the torsion failure phenomenon of low carbon steel and cast iron. 2. Strength calculation and stiffness calculation of verification type 19 circular shaft when it is twisted. 2. The concept of straight beam bending 1620 plane bending. Understand the concept of plane bending. 2. Master the calculation of shear force and bending moment. 2. Master the differential relationship between shear force and load concentration. The relationship between shear force and load concentration is skillfully drawn. Shear diagram and bending moment Figure 4 22 Calculation of bending normal stress Brief introduction of bending shear stress Master the distribution and calculation of cross-section normal stress when beam is bent and understand the calculation method of cross-section shear stress 4 Bending experiment and understand the experimental equipment. Master the distribution law of σ and the determination of Y; 2. Master the strength condition of the verified 23 beams and its application; 2. Understand the calculation of deflection and rotation angle; 2. Understand the research ideas of combined deformation; 2. Master the calculation of combined deformation of tension, compression and bending; 2. Master the calculation of bending-torsion composite deformation; 2. Master the calculation of bending-torsion composite deformation; 4. The stability of the decompression rod is improved. Understand the concept of stability, understand the concept of stability of slender compression bar, understand the calculation of critical force of slender compression bar, understand the concept of critical stress of decompression bar, understand the conditions of stability of decompression bar, understand the measures of improving stability of compression bar, understand the concept of dynamic load and fatigue strength of components, understand the concept of dynamic load, understand the concepts of alternating stress and fatigue failure, and understand materials. Material fatigue limit and its determination method, understand the main factors affecting the fatigue limit of components and the measures to improve the fatigue strength of components. 3. Links between this course and other courses. Engineering mechanics is based on advanced mathematics, general physics and mechanical drawing. Through the study of this course, it is the basis for students to learn related follow-up courses and engage in professional and technical work to cultivate their preliminary ability to simplify engineering problems and certain analytical and computational ability. Fourth, the course quality standards and performance assessment methods should be comprehensive, at the same time, the key points should be reflected, and the difficulty should be moderate. According to the teaching requirements of three different levels, the gradient of difficulty and the amount of questions should be arranged. For the contents that have not been specifically required to be taught, the requirements should be based on the levels of "understanding" and "understanding". Final exam, unified proposition of the whole school, unified grading standard and unified examination time. Closed-book exam, exam time 120 minutes. Students must complete their homework and experiments and pass the exam before they can take the exam. Fifth, the teaching link of the course requires the teaching form of this course; Classroom teaching, video recording, experiments, discussion classes, homework and exams. The main teaching method of this course is classroom teaching. In addition, it is necessary to arrange necessary teaching links such as experiments, discussion classes and homework. 1 Classroom teaching Classroom teaching (including exercises) is the most important teaching method of engineering mechanics. According to the syllabus, teachers should train basic methods by explaining, discussing and answering questions, and by analyzing the thinking of solving problems, so as to cultivate students' basic calculation ability and problem-solving ability. Because the course of Engineering Mechanics is a basic technical course, involving many practical engineering problems, some teaching contents are difficult to understand. It will help students to master the difficult contents by making full use of various means to express these teaching contents visually in teaching. At the same time, using a variety of modern teaching methods, gradually compiling and using computer-aided teaching software, stressing key points, difficulties, ideas and methods, and teaching basic concepts, basic theories and basic calculations will help students master the basic content of this course as soon as possible and better. 2. Self-study is an important way for college students to acquire knowledge. In order to cultivate students' self-study ability, we should pay attention to guiding students to learn independently in the teaching process. 3. The homework "Engineering Mechanics" involves many concepts, and the solving methods are flexible and diverse. For some practical engineering problems, we need the ability to analyze and solve problems. Therefore, it is necessary to deepen the understanding and mastery of concepts by doing problems, and be familiar with the application of basic formulas and methods, so as to achieve the purpose of understanding and mastering the knowledge learned. Therefore, completing homework independently is an important means to learn this course well. 4. Experimental course is one of the important teaching links of this course. Each class should complete the experiments specified in the syllabus on time to enhance students' perceptual knowledge. Students can complete the experiment in the mechanical laboratory of our school and fill in the experimental report as required. After each experiment, there are thinking exercises about experimental phenomena, and students can further deepen their understanding of experimental phenomena and contents by completing these exercises. 6. The teaching materials and main teaching reference books are Engineering Mechanics 1 and Engineering Mechanics, edited by Zhang and Zhang Jianqing. 2. Engineering Mechanics, edited by Mu Nengling; 3. Engineering Mechanics, Du, editor in chief.