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Fatigue Failure Resulting
6 from Variable Loading
Chapter Outline
6–1 Introduction to Fatigue in Metals 266
6–2 Approach to Fatigue Failure in Analysis and Design 272
6–3 Fatigue-Life Methods 273
6–4 The Stress-Life Method 273
6–5 The Strain-Life Method 276
6–6 The Linear-Elastic Fracture Mechanics Method 278
6–7 The Endurance Limit 282
6–8 Fatigue Strength 283
6–9 Endurance Limit Modifying Factors 286
6–10 Stress Concentration and Notch Sensitivity 295
6–11 Characterizing Fluctuating Stresses 300
6–12 Fatigue Failure Criteria for Fluctuating Stress 303
6–13 Torsional Fatigue Strength under Fluctuating Stresses 317
6–14 Combinations of Loading Modes 317
6–15 Varying, Fluctuating Stresses; Cumulative Fatigue Damage 321
6–16 Surface Fatigue Strength 327
6–17 Stochastic Analysis 330
6–18 Road Maps and Important Design Equations for the Stress-Life Method 344
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