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Engineering Mechanics [Edited by He Qing] 2014

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Of Engineering Mechanics: He Qing forward Published: 2014
Series items: Introduction to the textbooks for the "Twelfth Five-Year Plan" for general higher education This book combines the editor's years of experience and experience in teaching and reforming engineering mechanics, and uses engineering as the background. Based on the research and exploration of the systematic, logical, and complete teaching content of engineering mechanics, Innovative reforms have been made in the teaching content system, mechanics concepts, examples, and exercise selection to effectively help readers establish mechanical thinking, strengthen mechanical modeling capabilities, and develop the ability to solve practical engineering problems. The book consists of 14 chapters, consisting of two parts: statics and material mechanics. The statics section includes the basics of statics, the simplification of the force system, and the balance of the force system; the material mechanics section includes the basics of material mechanics, internal force analysis of components, axial tension and compression, torsion and shear, bending, stress state analysis and strength Theory, combined deformation, stability of compression bar, energy method, statically indeterminate structure, dynamic stress and alternating stress. This book arranges content summary, thinking questions and exercises after each chapter. The appendix at the back of the book includes the geometric properties of the plane figure, the deformation of the beam under the simple load, the steel profile table and the answers to the exercises. This book can be used as a teaching material for engineering mechanics courses of engineering majors in colleges and universities, and can also be used as a reference for teachers and students and engineering and technical personnel in vocational colleges.
table of Contents

editor
Introduction to the Preface of the Beijing Catalogue in February 2014 1
0? 1 Research content of engineering mechanics 1
0? 2 Research Methods of Engineering Mechanics 3
First statics
Chapter 1 Basics of Statics 8
1? 1 Basic Concepts of Statics 8
1? 2 Basic Principles of Statics 11
1? 3 Constraints and Binding Forces 14
1 ~ 4 Force Analysis and Force Diagram 20
1 to 5 moment and force couple 22
Summary 29
Thinking questions 30
Exercises 31
Chapter 2 Simplification of the Force System 34
Principal vectors and moments of the 2 to 1 force system 34
Simplification of the 2-2 Force System 37
Center of 2 ~ 3 parallel force system and center of gravity of object 44
Summary 47
Thinking questions 48
Exercises 50
Chapter 3 Balance of Forces 54
Equilibrium conditions and equations of the 3? 1 force system 54
3? 2 System Balance 60
3? 3 Plane Truss Balance 66
3? 4 Friction Balance Problems 71
Summary 81
Question 82
Exercises 85
Material Mechanics
Chapter 4 Fundamentals of Material Mechanics
4? 1 Basic Assumptions of Deformed Solids
4? 2 External, Internal, and Section Methods 96
4? 3 Stress and Strain 100
Deformation of 4? 4 members 102
Summary 107
Questions 107
Exercises 109
Chapter 5 Internal Force Analysis of Components 111
5? 1 Internal force on member cross section 111
5? 2 Internal Force Equation and Internal Force Diagram 115
5-3 Relationship between Internal Force and Load Concentration 122
Internal forces of 5? 4 rigid frames and curved rods 129
Summary 132
Questions 133
Exercises 135
Chapter 6 Axial Tension and Compression
6? 1 Axial tension and compression stress 142
6? 2 Strain in axial tension and compression rods 146
Mechanical properties of 6? 3 materials under tension and compression 149
6.4 Axial tensile and compressive strength conditions 155
6-5 stress concentration 160
Summary 161
Thinking Questions 162
Exercises 163
7.Twisting and Shearing
7.1 Twisting of thin-walled cylinder 169
7.2 Stress of torsion on a circular shaft 172
7? 3 Deformation of torsion of circular shaft 177
7? 4 Free torsion of non-circular section bar 179
Practical calculations for 7-5 joins 185
Summary 191
Questions 192
Exercises 194
Chapter 8 Bending 200
8? 1 Bending normal stress 200
8? 2 Bending Shear Stress 211
8? 3 Bend deformation 222
8-4 Measures to improve the bending strength and stiffness of the beam 232
Summary 239
Questions 240
Exercises 241
Chapter 9 Stress State Analysis and Strength Theory
Stress state at 9 to 1 point 249
9-2 Stress State Analysis 252
9? 3 Stress Circle Analysis
9? 4 Generalized Hook's Law 266
9-5 Strength Theory 271
Summary 280
Questions 282
Exercises 285
Catalog of Engineering Mechanics Chapter 10 Combined Deformation 291
10? 1 Compression and bending combined deformation 291
10? 2 oblique bending 299
10 ~ 3 Combined deformation of bending and torsion 304
Summary 309
Questions 310
Exercises 311
Chapter 11 Stabilization of Rods
11? 1 Concept of Stability 317
11? 2 Critical pressure of slender ram 320
11 ~ 3 critical stress diagram 326
11? 4 Stability conditions and reasonable design of pressure bar 332
Summary 338
Questions 339
Exercises 341
12.Energy Law
Strain energy of 12-1 members 344
12? 2 strain energy density 351
12-3 Reciprocity Theorem 357
12-4 Karst Theorem 360
12? 5 Principle of Virtual Work 364
12-6 Moore's Theorem and Graph Multiplication 366
Summary 376
Thinking Questions 378
Exercises 380
Chapter 13 Statically Indeterminate Structures
13? 1 Statically indeterminate structure and its analysis method 385
13? 2 Simple Statically Indeterminate Structure 387
13 ~ 3 Force Method for Solving Statically Indeterminate Structures 397
13-4 Karst Theorem Understanding the Statically Indeterminate Structure 410
Summary 412
Questions 412
Exercises 414
Chapter 14: Dynamic and Alternating Stresses
14? 1 Dynamic stress under inertia load 420
14? 2 impact stress 423
14? 3 Alternating Stress and Its Cyclic Properties 432
14-4 Fatigue test and endurance limit 435
14-5 Fatigue Strength Calculation 443
14-6 Measures to Improve Fatigue Strength of Members 447
Summary 449
Questions 450
Exercises 453
Addendum 457
Appendix A. Geometric Properties of Planar Figures
A? 1 Static moment and centroid 457
A? 2 moment of inertia and product of inertia 459
A? 3 parallel shift formula and rotary formula 463
Summary 468
Questions 469
Exercises 471

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