Mueller, Inka: Inspection of piezoelectric transducers used for structural health monitoring systems. 2016
Inhalt
- Title
- Abstract
- Kurzfassung
- Contents
- Nomenclature
- 1 Introduction
- 2 Basics
- 2.1 Acousto-ultrasonics-based SHM
- 2.2 Classical approach for probability of detection
- 2.3 Physics of piezoelectric wafer active sensors
- 2.4 Electro-mechanical impedance (EMI) of PWAS
- 2.5 Types of PWAS faults
- 2.6 State of the art for PWAS inspection
- 3 Effects of defect PWAS on acousto-ultrasonics - experiments & simulations
- 3.1 Effects of breakage
- 3.2 Numerical model in time domain
- 3.3 Effects of debonding
- 3.4 Effects of degradation of the adhesive layer
- 3.5 Effects of insufficient bonding conditions
- 4 Inspection of PWAS using the EMI spectrum
- 4.1 Effects of defect PWAS on the EMI
- 4.2 Development of a physics-based analytical model of the susceptance
- 4.3 Validation of a physics-based analytical modelof the susceptance
- 4.4 Design of a numerical model to calculate the EMI of PWAS
- 4.5 New methods for PWAS inspection
- 5 Evaluation of the performancefor methods to inspect PWAS
- 5.1 Description of the general approach based on POD
- 5.2 Performance assessment based on numerical results
- 6 Applications
- 6.1 PWAS inspection under changing temperature
- 6.2 PWAS inspection after system setup
- 6.3 PWAS breakage caused by bending loads
- 6.4 PWAS breakage under cyclic loading
- 6.5 Detection of debonding
- 6.6 Door surround structure
- 7 Conclusion
- References
- Appendix