Torres Arredondo, Miguel Angel: Acoustic emission testing and acousto-ultrasonics for structural health monitoring. 2013
Inhalt
- Front page
- Preface
- Contents
- Nomenclature
- Abstract
- Kurzfassung
- 1. Introduction
- 1.1. Structural Health Monitoring Concepts andTechniques
- 1.2. Literature Review
- 1.3. Objectives of the Thesis
- 1.4. Outline of the Thesis
- 1.5. Summary of Contributions Made by This Thesis
- 2. Theoretical Background
- 2.1. Introduction
- 2.2. Wave Propagation in Solid Media
- 2.3. Guided Waves Signal Attenuation
- 2.4. Ultrasonic Guided Wave Analysis Techniques
- 2.5. Sensors, Actuators and Measurement Chain
- 2.6. Signal Conditioning for Signal Post-processing
- 2.7. Dimension Reduction Techniques and Data-Driven Modelling
- 2.8. Visualization Techniques
- 3. Development of a Model for Guided Wave Propagation Analysis
- 3.1. Introduction
- 3.2. Model Development
- 3.3. Material Viscoelastic Damping Models
- 3.4. Energy Focusing Effect
- 3.5. Software Implementation of the Model
- 4. Modal Acoustic Emission for Source Identification and Localisation
- 4.1. Introduction
- 4.2. Mode Excitability
- 4.3. Time Delay Estimators and Onset Time Detectors
- 4.4. Time Frequency Analysis
- 4.5. Mode Identification by Supervised Neural Networks
- 4.6. Mode Identification by Modal Energy Orientation
- 4.7. Localisation
- 4.8. Acoustic Emission Identification by Unsupervised Neural Networks
- 5. Acousto-Ultrasonics for Damage Assessment
- 5.1. Introduction
- 5.2. Automatic Monitoring Strategy
- 5.3. Selection of the Actuation Signal
- 5.4. Temperature Effects
- 5.5. Additional Affecting Factors to Damage Detection Performance
- 5.6. Damage Detection Approach
- 6. Impact Load Monitoring
- 6.1. Introduction
- 6.2. Load Types and Load Monitoring Approaches
- 6.3. Feature Vectors Construction
- 6.4. System Modelling with Gaussian Processes
- 7. Experimental, Numerical and Application Examples
- 7.1. Introduction
- 7.2. Theoretical Model Validation, Dispersive Characteristics and Further Applications
- 7.3. Modal Acoustic Emission
- 7.4. Damage Assessment with Acousto-Ultrasonics
- 7.5. Impact Load Monitoring
- 8. Conclusions and Future Work
- Bibliography
- A. Appendix A
- B. Appendix B