Page 17 - Analysis and Design of Machine Elements

13.2.1.1 The Characteristics of Operation Conditions 375 Contents xv
13.2.1.2 Reliability and Operating Environments 376
13.2.1.3 Manufacturing, Installation, Maintenance and Cost Considerations 376
13.2.2 Coupling Size Selection 376
13.3 Introduction to Clutches 377
13.3.1 Applications, Characteristics and Structures 377
13.3.2 Types of Clutches 377
References 382
Problems 382

14 Springs 387
14.1 Introduction 388
14.1.1 Applications and Characteristics 388
14.1.2 Types of Spring and Structures 388
14.1.2.1 Helical Coil Springs 389
14.1.2.2 Belleville Springs 391
14.1.2.3 Spiral Springs 391
14.1.2.4 Leaf Springs 392
14.2 Working Condition Analysis 392
14.2.1 Geometry and Terminology 392
14.2.2 Spring Characteristic Curves 394
14.2.3 Storage and Dissipation of Energy 395
14.2.4 Potential Failure Modes 396
14.3 Loading Carrying Capacities 396
14.3.1 Analysis of Helical Compression Springs 396
14.3.1.1 Load-Deflection Relationship 396
14.3.1.2 Force Analysis 398
14.3.1.3 Strength Analysis 398
14.3.1.4 Rigidity Analysis 401
14.3.1.5 Buckling Analysis 402
14.3.1.6 Critical Frequency Analysis 403
14.3.2 Analysis of Helical Extension Springs 404
14.3.3 Analysis of Helical Torsion Springs 405
14.3.3.1 Load-Deflection Relationship 405
14.3.3.2 Force Analysis 405
14.3.3.3 Strength Analysis 405
14.3.3.4 Rigidity Analysis 406
14.4 Design of Springs 406
14.4.1 Introduction 406
14.4.2 Materials and Allowable Stresses 407
14.4.3 Design Criteria 409
14.4.4 Design Procedures and Guidelines 409
14.4.5 Design Cases 410
References 415
Problems 416

Index 419