Analysis and Design of Machine Elements

Incorporating Chinese, European, and International standards and units of measurement, this book presents a classic subject in an up-to-date manner with a strong emphasis on failure analysis and prevention-based machine element design. It presents concepts, principles, data, analyses, procedures, and decision-making techniques necessary to design safe, efficient, and workable machine elements. Design-centric and focused, the book will help students develop the ability to conceptualize designs from written requirements and to translate these design concepts into models and detailed manufacturing drawings.

• Presents a consistent approach to the design of different machine elements from failure analysis through strength analysis and structural design, which facilitates students? understanding, learning, and integration of analysis with design
• Fundamental theoretical topics such as mechanics, friction, wear and lubrication, and fluid mechanics are embedded in each chapter to illustrate design in practice
• Includes examples, exercises, review questions, design and practice problems, and CAD examples in each self-contained chapter to enhance learning 

Analysis and Design of Machine Elements is a design-centric textbook for advanced undergraduates majoring in Mechanical Engineering. Advanced students and engineers specializing in product design, vehicle engineering, power machinery, and engineering will also find it a useful reference and practical guide.

Preface xvii

About the Companion Website xix

Part I Fundamentals of Design and Strength Analysis 1

1 An Overview of Machine Design 3

1.1 Introduction 3

1.2 Machine Design 5

1.3 Machine Element Design 9

1.4 Materials and Their Properties 15

1.5 Unit Systems 21

1.6 Standards and Codes 22

References 23

Problems 23

2 Strength of Machine Elements 25

2.1 Fluctuating Loads and Stresses 26

2.2 Static Strength 29

2.3 Fatigue Strength 32

2.4 Contact Strength 50

References 52

Problems 53

Part II Design Applications 57

3 Detachable Joints and Fastening Methods 59

3.1 Introduction 60

3.2 Screw Threads 61

3.3 Threaded Fastening Methods 64

3.4 Force Analysis of Multiply Bolted Joints 67

3.5 Strength Analysis 71

3.6 Design of Bolted Joints 76

References 83

Problems 84

4 Detachable Fastenings for Shaft and Hub 91

4.1 Keys 91

4.2 Splines 96

4.3 Pins 97

References 98

Problems 99

5 Permanent Connections 105

5.1 Riveting 105

5.2 Welding 109

5.3 Brazing, Soldering and Adhesive Bonding 113

References 115

Problems 115

6 Belt Drives 119

6.1 Introduction 120

6.2 Working Condition Analysis 124

6.3 Power Transmission Capacities 131

6.4 Design of Belt Drives 135

6.5 Installation and Maintenance 140

References 141

Problems 141

7 Chain Drives 147

7.1 Introduction 148

7.2 Working Condition Analysis 151

7.3 Power Transmission Capacities 155

7.4 Design of Chain Drives 157

7.5 Drive Layout, Tension and Lubrication 163

References 165

Problems 165

8 Gear Drives 171

8.1 Introduction 173

8.2 Working Condition Analysis 178

8.3 Strength Analysis for Spur Gears 182

8.4 Strength Analysis for Helical Gears 188

8.5 Strength Analysis for Bevel Gears 196

8.6 Design of Gear Drives 202

8.7 Structural Design of Gears 224

8.8 Lubrication and Efficiency 225

References 225

Problems 226

9 Wormgear Drives 233

9.1 Introduction 234

9.2 Working Condition Analysis 239

9.3 Load Carrying Capacities 242

9.4 Design of Wormgear Drives 246

9.5 Structural Design of Wormgear Drives 253

9.6 Lubrication of Wormgear Drives 253

References 254

Problems 254

10 Shafts 259

10.1 Introduction 260

10.2 Working Condition Analysis 262

10.3 Load Carrying Capacities 264

10.4 Design of Shafts 271

References 284

Problems 284

11 Rolling Contact Bearings 291

11.1 Introduction 292

11.2 Working Condition Analysis 298

11.3 Life Expectancy and Load Carrying Capacities 305

11.4 Design of Bearing Support Systems 310

References 321

Problems 322

12 Sliding Bearings 329

12.1 Introduction 330

12.2 Working Condition Analysis 332

12.3 Load Carrying Capacities 340

12.4 Design of Sliding Bearings 349

References 360

Problems 360

13 Couplings and Clutches 365

13.1 Introduction to Couplings 366

13.2 Design and Selection of Couplings 375

13.3 Introduction to Clutches 377

References 382

Problems 382

14 Springs 387

14.1 Introduction 388

14.2 Working Condition Analysis 392

14.3 Loading Carrying Capacities 396

14.4 Design of Springs 406

References 415

Problems 416

Index 419

WEI JIANG, PHD, is a senior member of the Chinese Mechanical Engineering Society, and a Registered Professional Engineer in China, with extensive industrial experience in design and manufacturing. She has taught Mechanical Design, Computer Aided Design, and advised Mechanical Design Projects, capstone design projects for over ten years at Dalian University of Technology. She also teaches a graduate course on Mechanical Strength with emphasis on stress analysis, fracture and fatigue analysis of machine elements.