Front Cover -- Structural Health Monitoring -- Copyright Page -- Table of Contents -- Chapter 1 Introduction -- 1.1 Structural Health Monitoring Principles and Concepts -- 1.2 Structural Fracture and Failure -- 1.3 Improved Diagnosis and Prognosis Through Structural Health Monitoring -- 1.4 About this Book -- Chapter 2 Electroactive and Magnetoactive Materials -- 2.1 Introduction -- 2.2 Piezoelectricity -- 2.3 Piezoelectric Phenomena -- 2.4 Perovskite Ceramics -- 2.5 Piezopolymers -- 2.6 Magnetostrictive Materials -- 2.7 Summary and Conclusions -- 2.8 Problems and Exercises -- Chapter 3 Vibration of Solids and Structures -- 3.1 Introduction -- 3.2 Single Degree of Freedom Vibration Analysis -- 3.3 Vibration of Continuous Systems -- 3.4 Summary and Conclusions -- 3.5 Problems and Exercises -- Chapter 4 Vibration of Plates -- 4.1 Elasticity Equations for Plate Vibration -- 4.2 Axial Vibration of Rectangular Plates -- 4.3 Axial Vibration of Circular Plates -- 4.4 Flexural Vibration of Rectangular Plates -- 4.5 Flexural Vibration of Circular Plates -- 4.6 Problems and Exercises -- Chapter 5 Elastic Waves in Solids and Structures -- 5.1 Introduction -- 5.2 Axial Waves in Bars -- 5.3 Flexural Waves in Beams -- 5.4 Torsional Waves in Shafts -- 5.5 Plate Waves -- 5.6 3-D Waves -- 5.7 Summary and Conclusions -- 5.8 Problems and Exercises -- Chapter 6 Guided Waves -- 6.1 Introduction -- 6.2 Rayleigh Waves -- 6.3 SH Plate Waves -- 6.4 Lamb Waves -- 6.5 General Formulation of Guided Waves in Plates -- 6.6 Guided Waves in Tubes and Shells -- 6.7 Guided Waves in Composite Plates -- 6.8 Summary and Conclusions -- 6.9 Problems and Exercises -- Chapter 7 Piezoelectric Wafer Active Sensors -- 7.1 Introduction -- 7.2 PWAS Resonators -- 7.3 Circular PWAS Resonators -- 7.4 Coupled-Field Analysis of PWAS Resonators -- 7.5 Constrained PWAS.

7.6 PWAS Ultrasonic Transducers -- 7.7 Durability and Survivability of Piezoelectric Wafer Active Sensors -- 7.8 Summary and Conclusions -- 7.9 Problems and Exercises -- Chapter 8 Tuned Waves Generated with Piezoelectric Wafer Active Sensors -- 8.1 Introduction -- 8.2 State of the Art -- 8.3 Tuned Axial Waves Excited by PWAS -- 8.4 Tuned Flexural Waves Excited by PWAS -- 8.5 Tuned Lamb Waves Excited by PWAS -- 8.6 Experimental Validation of PWAS Lamb-Wave Tuning in Isotropic Plates -- 8.7 Directivity of Rectangular PWAS -- 8.8 PWAS-Guided Wave Tuning in Composite Plates -- 8.9 Summary and Conclusions -- 8.10 Problems and Exercises -- Chapter 9 High-Frequency Vibration SHM with PWAS Modal Sensors - the Electromechanical Impedance Method -- 9.1 Introduction -- 9.2 1-D PWAS Modal Sensors -- 9.3 Circular PWAS Modal Sensors -- 9.4 Damage Detection with PWAS Modal Sensors -- 9.5 Coupled-Field FEM Analysis of PWAS Modal Sensors -- 9.6 Summary and Conclusions -- 9.7 Problems and Exercises -- Chapter 10 Wave Propagation SHM with PWAS -- 10.1 Introduction -- 10.2 1-D Modeling and Experiments -- 10.3 2-D PWAS Wave Propagation Experiments -- 10.4 Pitch-Catch PWAS-Embedded NDE -- 10.5 Pulse-Echo PWAS-Embedded NDE -- 10.6 PWAS Time Reversal Method -- 10.7 PWAS Passive Transducers of Acoustic Waves -- 10.8 Summary and Conclusions -- 10.9 Problems and Exercises -- Chapter 11 In-Situ Phased Arrays with Piezoelectric Wafer Active Sensors -- 11.1 Introduction -- 11.2 Phased-Arrays in Conventional Ultrasonic NDE -- 11.3 1-D Linear PWAS Phased Arrays -- 11.4 Further Experiments with Linear PWAS Arrays -- 11.5 Optimization of PWAS Phased-Array Beamforming -- 11.6 Generic PWAS Phased-Array Formulation -- 11.7 2-D Planar PWAS Phased Array Studies -- 11.8 The 2-D Embedded Ultrasonic Structural Radar (2D-EUSR) -- 11.9 Damage Detection Experiments Using Rectangular PWAS Array.

11.10 Phased Array Analysis Using Fourier Transform Methods -- 11.11 Summary and Conclusions -- 11.12 Problems and Exercises -- Chapter 12 Signal Processing and Pattern Recognition for PWAS-based Structural Health Monitoring -- 12.1 Introduction -- 12.2 From Fourier Transform to Short-Time Fourier Transform -- 12.3 Wavelet Analysis -- 12.4 State-of-the-Art Damage Identification and Pattern Recognition for Structural Health Monitoring -- 12.5 Neural Networks -- 12.6 Features Extractors -- 12.7 Case Study: E/M Impedance Spectrum for Circular Plates of Various Damage Levels -- 12.8 Summary and Conclusions -- 12.9 Problems and Exercises -- Appendix A Mathematical Prerequisites -- A.1 Fourier Analysis -- A.2 Sampling Theory -- A.3 Convolution -- A.4 Hilbert Transform -- A.5 Correlation Method -- A.6 Time Averaged Product of Two Harmonic Variables -- A.7 Harmonic and Bessel Functions -- Appendix B Elasticity Notations and Equations -- B.1 Basic Notations -- B.2 3-D Strain-Displacement Relations -- B.3 Dilatation and Rotation -- B.4 3-D Stress−Strain Relations in Engineering Constants -- B.5 3-D Stress−Strain Relations in Lame Constants -- B.6 3-D Stress−Displacement Relations -- B.7 3-D Equations of Motion -- B.8 Tractions -- B.9 3-D Governing Equations−Navier Equations -- B.10 2-D Elasticity -- B.11 Polar Coordinates -- B.12 Cylindrical Coordinates -- B.13 Spherical Coordinates -- Bibliography -- Index.