Introduction ................................................................................................. 419
7.1
Surface Geometry ........................................................................................ 421
7.2
Mating Surfaces ........................................................................................... 423
7.3
Friction ......................................................................................................... 424
Effect of Roughness on Friction
425
Effect of Velocity on Friction
425
Rolling Friction
425
Effect of Lubricant on Friction
426
7.4
Adhesive Wear ............................................................................................. 426
The Adhesive-Wear Coefficient
429
7.5
Abrasive Wear ............................................................................................. 430
Abrasive Materials
433
Abrasion-Resistant Materials
433
7.6
Corrosion Wear ............................................................................................ 434
Corrosion Fatigue
435
Fretting Corrosion
435
7.7
Surface Fatigue.............................................................................................. 436
7.8
Spherical Contact ......................................................................................... 438
Contact Pressure and Contact Patch in Spherical Contact
438
Static Stress Distributions in Spherical Contact
440
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xiii
7.9
Cylindrical Contact ...................................................................................... 444
Contact Pressure and Contact Patch in Parallel Cylindrical Contact 444
Static Stress Distributions in Parallel Cylindrical Contact
445
7.10 General Contact ........................................................................................... 448
Contact Pressure and Contact Patch in General Contact
448
Stress Distributions in General Contact
450
7.11 Dynamic Contact Stresses ............................................................................ 453
Effect of a Sliding Component on Contact Stresses
453
7.12 Surface Fatigue Failure Models—Dynamic Contact .................................... 461
7.13 Surface Fatigue Strength............................................................................... 464
7.14 Summary ..................................................................................................... 470
Designing to Avoid Surface Failure
471
7.15 References ................................................................................................... 474
7.16 Problems ...................................................................................................... 476