Page 9 - Mechanical Behavior of Materials
P. 9
8 Contents
10 Stress-Based Approach to Fatigue: Notched Members 491
10.1 Introduction 491
10.2 Notch Effects 493
10.3 Notch Sensitivity and Empirical Estimates of k f 497
10.4 Estimating Long-Life Fatigue Strengths (Fatigue Limits) 501
10.5 Notch Effects at Intermediate and Short Lives 506
10.6 Combined Effects of Notches and Mean Stress 510
10.7 Estimating S-N Curves 520
10.8 Use of Component S-N Data 527
10.9 Designing to Avoid Fatigue Failure 536
10.10 Discussion 541
10.11 Summary 542
References 544
Problems and Questions 545
11 Fatigue Crack Growth 560
11.1 Introduction 560
11.2 Preliminary Discussion 561
11.3 Fatigue Crack Growth Rate Testing 569
11.4 Effects of R = S min /S max on Fatigue Crack Growth 574
11.5 Trends in Fatigue Crack Growth Behavior 584
11.6 Life Estimates for Constant Amplitude Loading 590
11.7 Life Estimates for Variable Amplitude Loading 601
11.8 Design Considerations 607
11.9 Plasticity Aspects and Limitations of LEFM for Fatigue Crack
Growth 609
11.10 Environmental Crack Growth 616
11.11 Summary 621
References 623
Problems and Questions 624
12 Plastic Deformation Behavior and Models for Materials 638
12.1 Introduction 638
12.2 Stress–Strain Curves 641
12.3 Three-Dimensional Stress–Strain Relationships 649
12.4 Unloading and Cyclic Loading Behavior from Rheological
Models 659
12.5 Cyclic Stress–Strain Behavior of Real Materials 668
12.6 Summary 681
References 683
Problems and Questions 684
