Chapter 1 Introduction 1.1 Mechanical Failure Modes 1.1.1 Excessive deformation 1.1.2 Ductile fracture 1.1.3 Brittle fracture 1.1.4 Thermal shock 1.1.5 Creep 1.1.6 Relaxation 1.1.7 Wear 1.1.8 Buckling 1.1.9 Corrosion 1.1.10 Stress corrosion cracking 1.1.11 Fatigue failure 1.2 Importance of fatigue 1.3 History overview of fatigue 1.4 Summary Problems References Chapter 2 Fatigue design method 2.1 Fatigue design method 2.1.1 Equipment design 2.1.2 Model design 2.1.3 Product design 2.1.4 Design to standard 2.2 Life prediction model 2.2.1 Stress-life model 2.2.2 Strain life model 2.2.3 Fatigue crack growth model 2.2.4 Two stage model 2.3 Fatigue design criteria 2.3.1 Infinite life design 2.3.2 Safety life design 2.3.3 Failure safety design 2.3.4 Damage tolerance design 2.4 Testing and analysis 2.4.1 Analysis and testing 2.4.2 CAE and digital prototype 2.4.3 Service inspection 2.5 Statistics and reliability 2.5.1 Definition of statistics and reliability 2.5.2 Reliability design concept 2.5.3 Main contents of reliability design 2.5.4 Methods and steps of reliability design 2.5.5 Statistical basis of reliability design 2.6 Summary Problems References Chapter 3 Fatigue failure mechanisms 3.1 Macroscopic characteristics of fatigue failure 3.1.1 Macroscopic morphology of fatigue fracture surface
3.1.2 Fatigue fracture characteristics of different load types 3.2 Microscopic characteristics of fatigue failure 3.2.1 Basic concept of dislocation 3.2.2 Dislocation movement 3.2.3 Dislocation slip and macro strain 3.2.4 Dislocations in typical crystal structures 3.2.5 Microstructure of fatigue fracture 3.2.6 Microscopic mechanism of fatigue crack initiation 3.2.7 Microscopic mechanism of fatigue crack growth 3.3 Fracture analysis technology 3.3.1 Optical microscope analysis of fracture surface 3.3.2 Electron microscopic analysis of fracture surface 3.4 Summary Problems References Chapter 4 Stress fatigue 4.1 Fatigue load, specimen, and testing machine 4.1.1 Fatigue load 4.1.2 Specimen 4.1.3 Fatigue testing machine 4.2 Stress-life (S–N) curve 4.2.1 General S –N curve 4.2.2 P –S –N curve 4.2.3 Fatigue limit under fully reversed uniaxial stress 4.3 Influence of mean stress 4.4 Factors affecting S –N characteristics 4.4.1 Microstructure 4.4.2 Size effect 4.4.3 Surface quality 4.4.4 Environment and frequency 4.5 S –N model and evaluation 4.6 Use S –N model for life prediction 4.7 Summary Problems References Chapter 5 Strain fatigue 5.1 Strain-controlled test 5.2 Monotonic stress-stain behavior 5.3 Cyclic stress-strain behavior 5.3.1 Cyclic stress-strain curve 5.3.2 Cyclic hardening and softening 5.3.3 Testing method of cyclic stress-strain curve 5.4 Life prediction using strain-life method 5.5 Evaluation of parameters 5.6 Mean stress effects 5.7 Factors influencing strain-life behavior 5.8 Summary Problems References Chapter 6 Fatigue crack growth
6.1 Introduction of LEFM 6.1.1 Crack form 6.1.2 Solution of SIF 6.1.3 K expression 6.1.4 Superposition principle 6.1.5 Limitation 6.2 Plastic zone at crack tip 6.2.1 Concept of plastic zone 6.2.2 Size of monotone plastic zone 6.2.3 Size of cyclic plastic zone 6.2.4 Plastic deformation mechanism 6.3 Fracture toughness 6.3.1 Fracture toughness evaluation method 6.3.2 Plane strain fracture toughness Kic 6.3.3 Influencing factors of fracture toughness 6.4 Fatigue crack growth behavior 6.4.1 Crack growth curve 6.4.2 Testing method of constant amplitude crack propagation 6.4.3 Fatigue life prediction 6.5 Influence of average stress 6.6 Summary Problems References Chapter 7 Notch fatigue 7.1 Stress concentration and stress gradient 7.1.1 Stress concentration 7.1.2 Stress gradient 7.1.3 Notch stress distribution 7.1.4 Effect of notch 7.1.5 Pin loading hole 7.2 Notch fatigue stress-life method 7.2.1 Fatigue notch factor and sensitivity 7.2.2 Effect of stress level 7.2.3 Effect of average stress 7.3 Notch fatigue strain-life method 7.3.1 Notch stress and strain 7.3.2 Calculation of strain energy density 7.3.3 Plane stress and plane strain 7.3.4 Examples of notch strain analysis 7.4 Notch fatigue crack growth method 7.5 Two stage life prediction 7.6 Summary Problems References Chapter 8 Variable fatigue 8.1 Load spectrum 8.1.1 Definition of load spectrum 8.1.2 Load signal 8.1.3 Determination of load spectrum 8.2 Cumulative damage
8.2.1 Linear damage theory 8.2.2 Nonlinear damage theory 8.3 Counting method 8.3.1 Cycle counting method 8.3.2 Acyclic counting method 8.3.3 Results and discussion 8.3.4 Application of rain flow counting method 8.4 VA loading test 8.4.1 Simulation test method 8.4.2 Test system 8.4.3 Block spectrum test 8.4.4 Variable-amplitude fatigue test and load spectrum 8.4.5 Random loading test 8.4.6 Analysis of test results 8.5 Influencing factors of VA fatigue test 8.5.1 Counting method of reconstructed load spectrum 8.5.2 Number of load levels 8.5.3 Load sequence effect 8.5.4 Loading frequency 8.5.5 Limitations of high stress signal 8.5.6 Irregular factor 8.5.7 Small load cycle 8.5.8 Accelerated fatigue test 8.6 Life estimation based on stress fatigue 8.7 Life estimation based on strain fatigue 8.8 Life estimation based on crack growth rate 8.9 Summary Problems References Chapter 9 Environmental effect 9.1 Corrosion fatigue 9.1.1 Stress corrosion cracking 9.1.2 Stress fatigue behavior 9.1.3 Strain fatigue behavior 9.1.4 _ Fatigue crack growth behavior 9.1.5 Preventive measures 9.1.6 Fatigue life prediction 9.2 High temperature fatigue 9.2.1 High temperature creep 9.2.2 Cyclic load effect and holding time effect 9.2.3 Stress fatigue behavior 9.2.4 Strain fatigue behavior 9.2.5 Fatigue crack growth behavior 9.3 Summary Problems References
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