Structural Health Monitoring with Piezoelectric Wafer Active Sensors

Structural Health Monitoring with Piezoelectric Wafer Active Sensors, Second Edition provides an authoritative theoretical and experimental guide to this fast-paced, interdisciplinary area with exciting applications across a range of industries.

The book begins with a detailed yet digestible consolidation of the fundamental theory relating to structural health monitoring (SHM). Coverage of fracture and failure basics, relevant piezoelectric material properties, vibration modes in different structures, and different wave types provide all the background needed to understand SHM and apply it to real-world structural challenges. Moving from theory to experimental practice, the book then provides the most comprehensive coverage available on using piezoelectric wafer active sensors (PWAS) to detect and quantify damage in structures.

Updates to this edition include circular and straight-crested Lamb waves from first principle, and the interaction between PWAS and Lamb waves in 1-D and 2-D geometries. Effective shear stress is described, and tuning expressions between PWAS and Lamb waves has been extended to cover axisymmetric geometries with a complete Hankel-transform-based derivation.

New chapters have been added including hands-on SHM case studies of PWAS stress, strain, vibration, and wave sensing applications, along with new sections covering essential aspects of vibration and wave propagation in axisymmetric geometries.

Comprehensive coverage of underlying theory such as piezoelectricity, vibration, and wave propagation alongside experimental techniques Includes step-by-step guidance on the use of piezoelectric wafer active sensors (PWAS) to detect and quantify damage in structures, including clear information on how to interpret sensor signal patterns Updates to this edition include a new chapter on composites and new sections on advances in vibration and wave theory, bringing this established reference in line with the cutting edge in this emerging area

Preface 1. Introduction 2. Electroactive and Magnetoactive Materials 3. Vibration Fundamentals 4. Vibration of Plates 5. Elastic Waves 6. Guided Waves 7. Piezoelectric Wafer Active Sensors -- PWAS Transducers 8. Coupling of PWAS Transducers to the Monitored Structure 9. PWAS Resonators 10. Wave Tuning with Piezoelectric Wafer Active Sensors 11. High-Frequency Vibration SHM with PWAS Modal Sensors -- the Electromechanical Impedance Method 12. Wave Propagation SHM with PWAS Transducers 13. In-Situ Phased Arrays with Piezoelectric Wafer Active Sensors 14. Signal Processing and Pattern Recognition for Structural Health Monitoring with PWAS Transducers 15. Case Studies of Multi-method SHM with PWAS Transducers: Damage ID in Experimental Signals Appendix A: Mathematical Prerequisites Appendix B: Elasticity Notations and Equations References