本书介绍了工程力学的原理及其应用。内容包括：理论力学的基本概念、质点静力学、力系的简化、刚体静力学、摩擦、质点运动学、刚体平面运动学、质点合成运动、质点动力学、刚体平面动力学、材料力学的基本概念、材料机械性能、杆的轴向拉伸与压缩、轴的扭转、梁的剪力与弯矩、梁的正应力与剪应力、梁的挠度与转角、应力分析与强度理论、组合载荷和压杆稳定。附录部分包括：重心与形心、转动惯量、截面几何性质、型钢几何性质和常用梁的挠度与转角。

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　工程力学是航空、机械和土木工程等学科专业学生的必修课，通常在大二学年讲授。本书旨在向学生传授工程力学的理论及其应用，主要包括理论力学和材料力学：前者由前8章组成，研究受力作用物体的平衡和运动：后者包含其余9章，研究承受轴向拉压、扭转、弯曲和组合载荷作用构件的分析和设计。
　　本书由17章组成。第1章介绍理论力学基础。第2章讨论作用于质点上的汇交力系的合成与平衡。第3章考虑刚体的平衡以及平面桁架的内力。第4章介绍滑动摩擦与滚动摩阻的概念。第5章分析质点的速度与加速度，以及质点的合成运动。第6章涉及平移、转动和一般平面运动刚体的速度与加速度。第7章和第8章分别研究质点动力学和刚体平面动力学。第9章介绍材料力学基础。第10章和第11章分别讨论轴向拉压杆和扭转轴的应力与变形。第12章、第13章和第14章分别涉及弯曲梁的内力、应力和变形。第15章介绍应力分析与强度理论。第16章考虑组合载荷作用构件的应力。第17章分析压杆失稳。
　　本书可作为高等院校航空、机械和土木工程等专业的英文、中文或双语工程力学教材。

Contents 目 录
Preface 前言
English Edition
Chapter 1 Fundamentals of Theoretical Mechanics 1
1.1 Basic Concepts 1 1.2 Newton’s Laws 2
1.3 Parallelogram Law 3
1.4 Moment of Force 4
1.5 Principle of Moments 7
1.6 Moment of Couple 8
1.7 Reduction of Force System 9
Problems 13
Chapter 2 Statics of Particle 15
2.1 Resultant of Coplanar Concurrent Forces 15
2.2 Equilibrium of Coplanar Concurrent Forces 20
2.3 Resultant of Spatial Concurrent Forces22
2.4 Equilibrium of Spatial Concurrent Forces 25
Problems 26Chapter 3 Statics of Rigid Body 30
3.1 Equilibrium of Two-Dimensional Rigid Body 30
3.2 Two-Force and Three-Force Bodies 33
3.3 Planar Trusses 34
3.4 Equilibrium of Three-Dimensional Rigid Body 38
Problems 39 Chapter 4 Friction 43
4.1 Sliding Friction 43
4.2 Angle of Friction 44
4.3 Problems Involving Sliding Friction 46
4.4 Rolling Resistance 49
Problems 50
Chapter 5 Kinematics of Particle 52
5.1 Motion of Particle 52
5.2 Resultant Motion of Particle 57
Problems 62
Chapter 6 Kinematics of Rigid Body in Plane Motion 65
6.1 Translation 66
6.2 Rotation about Fixed Axis 67
6.3 General Plane Motion 69 Problems 76
Chapter 7 Kinetics of Particle78
7.1 Method of Motion Equations 78
7.2 Method of Inertia Force 81
7.3 Method of Work and Energy 82
7.4 Method of Impulse and Momentum 85
Problems 87
Chapter 8 Kinetics of Rigid Body in Plane Motion 90
8.1 Motion of Mass Center of System of Particles 92
8.2 Motion of System of Particles about Mass Center 92
8.3 Method of Motion Equations for Rigid Body in Plane Motion 93
8.4 Method of Inertia Force for Rigid Body in Plane Motion 95
8.5 Method of Work and Energy for Rigid Body in Plane Motion 97
8.6 Method of Impulse and Momentum for Rigid Body in Plane Motion 100
Problems 101
Chapter 9 Fundamentals of Mechanics of Materials 105
9.1 External Forces 105
9.2 Internal Forces 106
9.3 Stresses 107
9.4 Strains 111
9.5 Hooke’s Law 113
Problems 113
Chapter 10 Axial Tension or Compression 115
10.1 Axial Force115
10.2 Normal Stress on Cross Section 115
10.3 Normal and Shearing Stresses on Oblique Section 117
10.4 Normal Strain 119
10.5 Deformation of Axially Loaded Bar 120
10.6 Statically Indeterminate Axially Loaded Bar 122
10.7 Design of Axially Loaded Bar 123
Problems 124
Chapter 11 Torsion 127
11.1 Twisting Moment 127
11.2 Hooke’s Law in Shear 127
11.3 Shearing Stress on Cross Section 128
11.4 Normal and Shearing Stresses on Oblique Section 131
11.5 Angle of Twist 132
11.6 Statically Indeterminate Shaft 134
11.7 Design of Circular Shaft 135
Problems 136
Chapter 12 Bending Internal Forces 139
12.1 Shearing-Force and Bending-Moment Diagrams 140
12.2 Relations between Distributed Load, Shearing Force, and Bending Moment 143
12.3 Relations between Concentrated Load, Shearing Force, and Bending Moment 146
Problems 148
Chapter 13 Bending Stresses 150
13.1 Normal Stresses on Cross Section in Pure Bending 150
13.2 Normal and Shearing Stresses on Cross Section in Transverse-Force Bending 154
13.3 Design of Prismatic Beam 159
Problems 160
Chapter 14 Bending Deformation 163
14.1 Method of Integration 164
14.2 Method of Superposition 166
14.3 Statically Indeterminate Beam 167
Problems 169
Chapter 15 Stress Analysis and Strength Theories 171
15.1 Stress Transformation 171
15.2 Principal Stresses 173
15.3 Maximum Shearing Stresses 175
15.4 Pressure Vessels 177
15.5 Generalized Hooke’s Law 179
15.6 Strength Theories 181
Problems 185
Chapter 16 Combined Loadings 188
16.1 Bar in Eccentric Tension or Compression 188
16.2 I-Beam in Transverse-Force Bending190
16.3 Beam in Bending and Tension/Compression 194
16.4 Shaft in Torsion and Bending 196
Problems 199Chapter 17 Stability of Column 201
17.1 Critical Load of Long Column with Pin Supports201
17.2 Critical Load of Long Column with Other Supports 203
17.3 Critical Stress of Long Column 204
17.4 Critical Stress of Intermediate Column 205
17.5 Design of Column 207
Problems 209
References 211
Appendix I Center of Gravity 212
I.1 Plate 212
I.2 Composite Plate 212
I.3 3D Body 213
I.4 3D Composite Body 214
Appendix II Mass Moment of Inertia 216
II.1 Moment of Inertia and Radius of Gyration 216
II.2 Parallel-Axis Theorem 216
Appendix 111Properties of Materials 218
III.1 Tension of Low-Carbon Steel 218
III.2 Ductile and Brittle Materials 220
III.3 Stress-Strain Curve of Ductile Materials without Distinct Yield Point 221
III.4 Percent Elongation and Percent Reduction in Area 221
III.5 Properties of Materials in Compression 222
Appendix IV Properties of Area 223
IV.1 First Moment 223
IV.2 Moment of Inertia and Polar Moment of Inertia 224
IV.3 Radius of Gyration and Polar Radius of Gyration 225
IV.4 Product of Inertia 226
IV.5 Parallel-Axis Theorem 226
IV.6 Geometrical Properties of Commonly-Used Areas 227
Appendix V Shape Steels 228
V.1 I Steel 228
V.2 Channel Steel 229
V.3 Equal Angle Steel 231
V.4 Unequal Angle Steel 233
Appendix VI Deflection Curves 236
中文版
第1章理论力学基础237
1.1基本概念237
1.2牛顿定律238
1.3平行四边形定律238
1.4力矩239
1.5力矩定理242
1.6力偶矩243
1.7力系简化243
习题246
第2章质点静力学249
2.1平面汇交力合成249
2.2平面汇交力平衡254
2.3空间汇交力合成256
2.4空间汇交力平衡258
习题259
第3章刚体静力学262
3.1二维刚体平衡262
3.2二力和三力物体264
3.3平面桁架265
3.4三维刚体平衡269
习题270
第4章摩擦274
4.1滑动摩擦274
4.2摩擦角275
4.3滑动摩擦问题276
4.4滚动摩阻279
习题279
第5章质点运动学281
5.1质点运动281
5.2质点合成运动285
习题289
第6章刚体平面运动学292
6.1平移293
6.2定轴转动294
6.3一般平面运动296
习题302
第7章质点动力学304
7.1运动方程法304
7.2惯性力法307
7.3功能法307
7.4冲量动量法310
习题312
第8章刚体平面动力学315
8.1质点系质心的运动316
8.2质点系相对质心的运动317
8.3平面运动刚体的运动方程法318
8.4平面运动刚体的惯性力法320
8.5平面运动刚体的功能法321
8.6平面运动刚体的冲量动量法324
习题325
第9章材料力学基础329
9.1外力329
9.2内力330
9.3应力331
9.4应变334
9.5胡克定律336
习题336
第10章轴向拉压337
10.1轴力337
10.2横截面正应力337
10.3斜截面正应力和剪应力338
10.4线应变340
10.5拉压变形342
10.6静不定拉压杆343
10.7拉压杆设计344
习题345
第11章扭转347
11.1扭矩347
11.2剪切胡克定律347
11.3横截面剪应力348
11.4斜截面正应力和剪应力351
11.5扭转角352
11.6静不定轴353
11.7圆轴设计354
习题355
第12章弯曲内力357
12.1剪力和弯矩图358
12.2分布载荷、剪力和弯矩之间的关系360
12.3集中载荷、剪力和弯矩之间的关系362
习题364
第13章弯曲应力366
13.1纯弯曲横截面正应力366
13.2横力弯曲横截面正应力和剪应力369
13.3等直梁设计373
习题374
第14章弯曲变形377
14.1积分法378
14.2叠加法379
14.3静不定梁381
习题382
第15章应力分析与强度理论384
15.1应力变换384
15.2主应力386
15.3最大剪应力387
15.4压力容器389
15.5广义胡克定律391
15.6强度理论393
习题396
第16章组合载荷399
16.1偏心拉（压）杆399
16.2横弯工字梁401
16.3拉（压）弯梁403
16.4弯扭轴405
习题407
第17章压杆稳定409
17.1两端铰支细长压杆临界载荷409
17.2其他支撑细长压杆临界载荷410
17.3细长压杆临界应力411
17.4中长压杆临界应力412
17.5压杆设计414
习题415
主要参考文献417
附录I重心418
I.1薄板418
I.2组合薄板418
I.3三维物体419
I.4三维组合物体419
附录II转动惯量421
II.1转动惯量与回转半径421
II.2平行移轴定理421
附录III材料性能423
III.1低碳钢拉伸423
III.2塑性和脆性材料424
III.3无明显屈服点塑性材料的应力应变曲线425
III.4伸长率和断面收缩率425
III.5材料压缩性能425
附录IV截面性质427
IV.1静矩427
IV.2惯性矩与极惯性矩428
IV.3惯性半径与极惯性半径428
IV.4惯性积429
IV.5平行移轴定理429
IV.6常用截面几何性质430
附录V型钢431
V.1工字钢431
V.2槽钢432
V.3等边角钢434
V.4不等边角钢437
附录VI挠度曲线440Contents 目 录
Preface 前言
English Edition
Chapter 1 Fundamentals of Theoretical Mechanics 1
1.1 Basic Concepts 1 1.2 Newton’s Laws 2
1.3 Parallelogram Law 3
1.4 Moment of Force 4
1.5 Principle of Moments 7
1.6 Moment of Couple 8
1.7 Reduction of Force System 9
Problems 13
Chapter 2 Statics of Particle 15
2.1 Resultant of Coplanar Concurrent Forces 15
2.2 Equilibrium of Coplanar Concurrent Forces 20
2.3 Resultant of Spatial Concurrent Forces22
2.4 Equilibrium of Spatial Concurrent Forces 25
Problems 26
Chapter 3 Statics of Rigid Body 30
3.1 Equilibrium of Two-Dimensional Rigid Body 30
3.2 Two-Force and Three-Force Bodies 33
3.3 Planar Trusses 34
3.4 Equilibrium of Three-Dimensional Rigid Body 38
Problems 39
Chapter 4 Friction 43
4.1 Sliding Friction 43
4.2 Angle of Friction 44
4.3 Problems Involving Sliding Friction 46
4.4 Rolling Resistance 49
Problems 50
Chapter 5 Kinematics of Particle 52
5.1 Motion of Particle 52
5.2 Resultant Motion of Particle 57
Problems 62
Chapter 6 Kinematics of Rigid Body in Plane Motion 65
6.1 Translation 66
6.2 Rotation about Fixed Axis 67
6.3 General Plane Motion 69
Problems 76
Chapter 7 Kinetics of Particle78
7.1 Method of Motion Equations 78
7.2 Method of Inertia Force 81
7.3 Method of Work and Energy 82
7.4 Method of Impulse and Momentum 85
Problems 87
Chapter 8 Kinetics of Rigid Body in Plane Motion 90
8.1 Motion of Mass Center of System of Particles 92
8.2 Motion of System of Particles about Mass Center 92
8.3 Method of Motion Equations for Rigid Body in Plane Motion 93
8.4 Method of Inertia Force for Rigid Body in Plane Motion 95
8.5 Method of Work and Energy for Rigid Body in Plane Motion 97
8.6 Method of Impulse and Momentum for Rigid Body in Plane Motion 100
Problems 101
Chapter 9 Fundamentals of Mechanics of Materials 105
9.1 External Forces 105
9.2 Internal Forces 106
9.3 Stresses 107
9.4 Strains 111
9.5 Hooke’s Law 113
Problems 113
Chapter 10 Axial Tension or Compression 115
10.1 Axial Force115
10.2 Normal Stress on Cross Section 115
10.3 Normal and Shearing Stresses on Oblique Section 117
10.4 Normal Strain 119
10.5 Deformation of Axially Loaded Bar 120
10.6 Statically Indeterminate Axially Loaded Bar 122
10.7 Design of Axially Loaded Bar 123
Problems 124
Chapter 11 Torsion 127
11.1 Twisting Moment 127
11.2 Hooke’s Law in Shear 127
11.3 Shearing Stress on Cross Section 128
11.4 Normal and Shearing Stresses on Oblique Section 131
11.5 Angle of Twist 132
11.6 Statically Indeterminate Shaft 134
11.7 Design of Circular Shaft 135
Problems 136
Chapter 12 Bending Internal Forces 139
12.1 Shearing-Force and Bending-Moment Diagrams 140
12.2 Relations between Distributed Load, Shearing Force, and Bending Moment 143
12.3 Relations between Concentrated Load, Shearing Force, and Bending Moment 146
Problems 148
Chapter 13 Bending Stresses 150
13.1 Normal Stresses on Cross Section in Pure Bending 150
13.2 Normal and Shearing Stresses on Cross Section in Transverse-Force Bending 154
13.3 Design of Prismatic Beam 159
Problems 160
Chapter 14 Bending Deformation 163
14.1 Method of Integration 164
14.2 Method of Superposition 166
14.3 Statically Indeterminate Beam 167
Problems 169
Chapter 15 Stress Analysis and Strength Theories 171
15.1 Stress Transformation 171
15.2 Principal Stresses 173
15.3 Maximum Shearing Stresses 175
15.4 Pressure Vessels 177
15.5 Generalized Hooke’s Law 179
15.6 Strength Theories 181
Problems 185
Chapter 16 Combined Loadings 188
16.1 Bar in Eccentric Tension or Compression 188
16.2 I-Beam in Transverse-Force Bending190
16.3 Beam in Bending and Tension/Compression 194
16.4 Shaft in Torsion and Bending 196
Problems 199Chapter 17 Stability of Column 201
17.1 Critical Load of Long Column with Pin Supports201
17.2 Critical Load of Long Column with Other Supports 203
17.3 Critical Stress of Long Column 204
17.4 Critical Stress of Intermediate Column 205
17.5 Design of Column 207
Problems 209
References 211
Appendix I Center of Gravity 212
I.1 Plate 212
I.2 Composite Plate 212
I.3 3D Body 213
I.4 3D Composite Body 214
Appendix II Mass Moment of Inertia 216
II.1 Moment of Inertia and Radius of Gyration 216
II.2 Parallel-Axis Theorem 216
Appendix 111Properties of Materials 218
III.1 Tension of Low-Carbon Steel 218
III.2 Ductile and Brittle Materials 220
III.3 Stress-Strain Curve of Ductile Materials without Distinct Yield Point 221
III.4 Percent Elongation and Percent Reduction in Area 221
III.5 Properties of Materials in Compression 222
Appendix IV Properties of Area 223
IV.1 First Moment 223
IV.2 Moment of Inertia and Polar Moment of Inertia 224
IV.3 Radius of Gyration and Polar Radius of Gyration 225
IV.4 Product of Inertia 226
IV.5 Parallel-Axis Theorem 226
IV.6 Geometrical Properties of Commonly-Used Areas 227
Appendix V Shape Steels 228
V.1 I Steel 228
V.2 Channel Steel 229
V.3 Equal Angle Steel 231
V.4 Unequal Angle Steel 233
Appendix VI Deflection Curves 236
中文版
第1章理论力学基础237
1.1基本概念237
1.2牛顿定律238
1.3平行四边形定律238
1.4力矩239
1.5力矩定理242
1.6力偶矩243
1.7力系简化243
习题246
第2章质点静力学249
2.1平面汇交力合成249
2.2平面汇交力平衡254
2.3空间汇交力合成256
2.4空间汇交力平衡258
习题259
第3章刚体静力学262
3.1二维刚体平衡262
3.2二力和三力物体264
3.3平面桁架265
3.4三维刚体平衡269
习题270
第4章摩擦274
4.1滑动摩擦274
4.2摩擦角275
4.3滑动摩擦问题276
4.4滚动摩阻279
习题279
第5章质点运动学281
5.1质点运动281
5.2质点合成运动285
习题289
第6章刚体平面运动学292
6.1平移293
6.2定轴转动294
6.3一般平面运动296
习题302
第7章质点动力学304
7.1运动方程法304
7.2惯性力法307
7.3功能法307
7.4冲量动量法310
习题312
第8章刚体平面动力学315
8.1质点系质心的运动316
8.2质点系相对质心的运动317
8.3平面运动刚体的运动方程法318
8.4平面运动刚体的惯性力法320
8.5平面运动刚体的功能法321
8.6平面运动刚体的冲量动量法324
习题325
第9章材料力学基础329
9.1外力329
9.2内力330
9.3应力331
9.4应变334
9.5胡克定律336
习题336
第10章轴向拉压337
10.1轴力337
10.2横截面正应力337
10.3斜截面正应力和剪应力338
10.4线应变340
10.5拉压变形342
10.6静不定拉压杆343
10.7拉压杆设计344
习题345
第11章扭转347
11.1扭矩347
11.2剪切胡克定律347
11.3横截面剪应力348
11.4斜截面正应力和剪应力351
11.5扭转角352
11.6静不定轴353
11.7圆轴设计354
习题355
第12章弯曲内力357
12.1剪力和弯矩图358
12.2分布载荷、剪力和弯矩之间的关系360
12.3集中载荷、剪力和弯矩之间的关系362
习题364
第13章弯曲应力366
13.1纯弯曲横截面正应力366
13.2横力弯曲横截面正应力和剪应力369
13.3等直梁设计373
习题374
第14章弯曲变形377
14.1积分法378
14.2叠加法379
14.3静不定梁381
习题382
第15章应力分析与强度理论384
15.1应力变换384
15.2主应力386
15.3最大剪应力387
15.4压力容器389
15.5广义胡克定律391
15.6强度理论393
习题396
第16章组合载荷399
16.1偏心拉（压）杆399
16.2横弯工字梁401
16.3拉（压）弯梁403
16.4弯扭轴405
习题407
第17章压杆稳定409
17.1两端铰支细长压杆临界载荷409
17.2其他支撑细长压杆临界载荷410
17.3细长压杆临界应力411
17.4中长压杆临界应力412
17.5压杆设计414
习题415
主要参考文献417
附录I重心418
I.1薄板418
I.2组合薄板418
I.3三维物体419
I.4三维组合物体419
附录II转动惯量421
II.1转动惯量与回转半径421
II.2平行移轴定理421
附录III材料性能423
III.1低碳钢拉伸423
III.2塑性和脆性材料424
III.3无明显屈服点塑性材料的应力应变曲线425
III.4伸长率和断面收缩率425
III.5材料压缩性能425
附录IV截面性质427
IV.1静矩427
IV.2惯性矩与极惯性矩428
IV.3惯性半径与极惯性半径428
IV.4惯性积429
IV.5平行移轴定理429
IV.6常用截面几何性质430
附录V型钢431
V.1工字钢431
V.2槽钢432
V.3等边角钢434
V.4不等边角钢437
附录VI挠度曲线440