The Modified Wöhler Curve Method

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Table of contents

Chapter 1. Introduction
1.1. Context of the study
1.2. Review of the state of the art
1.3. Thesis scope
Chapter 2. Theory
2.1. Introduction
2.2. Basic contact mechanic
2.3. Multiaxial fatigue
2.4. Critical distance
2.5. Crack analogue
Chapter 3. Material and methods
3.1. Introduction
3.2. Titanium alloy
3.3. Group Tests
Chapter 4. Experimental verification of the crack analogue model
4.1. Introduction
4.2. Group I Tests: Determination of tests configuration
4.3. Analysis of the gradient effect
4.4. Influence of the maximum normal stress on the crack initiation process
4.5. Discussion of the analysis
Chapter 5. Study of the size effect on fretting fatigue
5.1. Introduction
5.2. Group II-a Tests: Study of the influence of the width of the specimens on fretting fatigue
5.3. Group II-b Tests: Influence of the damaged area on fretting fatigue
5.4. Post-failure investigation
5.5. Determination of the volume’s influence using the Weibull’s theory
5.6. Discussion of the results
Chapter 6. Conclusions
6.1. Overview
6.2. Main conclusions
6.3. Suggestions for future work
References