Preface
Chapter 1. Overviews: Nonlinear Ultrasonic Characteristics and Measurands
Chapter 2. Elastic Nonlinearity induced Nonlinear Ultrasonic Characteristics
2.1 Higher Harmonics (HH) Generation
2.2 Nonlinear Ultrasonic Parameters
2.2.1 Absolute Nonlinear Ultrasonic Parameter
2.2.2 Relative Nonlinear Ultrasonic Parameter
2.3 Measurement of Nonlinear Ultrasonic Parameter
2.3.1 Capacitive Detection and Laser-interferometric Detection
2.3.2 Piezo-electric Detection
2.3.3 Control of Propagation Distance and Control of Incident Wave Power
2.3.4 Phase Inversion Technique
2.4 Factors Affecting to Measurement Reliability
2.4.1 Measurement System: Transducer, Input Power, Contact Pressure, Electronic Equipment
2.4.2 Digital Signal Processings: Bandwidth of Incident Wave, Time Resolution, Amplitude Resolution
2.5 Applications to Assessment of Material Damage
2.5.1 Fatigue Damage 2.5.2 Plastic Deformation
2.5.3 Thermal Aging
References
Chapter 3. Nonlinear Acoustic Wave Interactions with Contact Interfaces: Methodologies and Applications
3.1. Nonlinear Reflection Approach to Interface Nonlinearity
3.1.1 Nonlinear acoustic reflection at an ideally bonded interface
3.2.1 Application of Reflection Concept to Nonlinear Interface Wave Propagation
3.3.1 Second Harmonic Generation of Interface Acoustic Waves
3.2. Acoustic Nonlinearity of a Non-Bonded Interface
3.2.1 Phenomenology of Contact Acoustic Nonlinearity (CAN)
3.2.2 Higher Harmonics (HH) Generation at Contact Interfaces3.2.3 Nonlinear Acoustic Reflection by Fractured Defects
3.2.4 Acoustic Rectification and Nonlinear Polarization Effects via CAN
3.3. Non-Classical Nonlinear Effects in Resonant Contact Inclusions
3.3.1 Concept of Local Defect Resonance3.3.2 Sub- and Super-harmonic Resonances
3.3.3 Nonlinear Parametric Instability Effects3.4. Applications for Nonlinear Imaging of Defects
3.4.1 Nonlinear Scanning Laser Vibrometry
3.4.2 Nonlinear Air-Coupled Emission (NACE)
3.4.3 Case Studies of Nonlinear Imaging of Defects
References
Chapter 4. Nonlinear Ultrasonic Phased Array for Measurement of Closed-Crack Depth
4.1. Introduction 4.2. Harmonics
4.2.1. Principles
4.2.2. Experimental conditions
4.2.3. Imaging results
4.3. Parallel and sequential transmission
4.3.1. Principles
4.3.2. Experimental conditions
4.3.3. Imaging results
4.4. Full-, odd- and even-elements transmission
4.4.1. Principles
4.4.2. Experimental conditions4.4.3. Imaging results
4.5. Utilization of thermal stress
4.5.1. Principles
4.5.2. Experimental conditions
4.5.3. Imaging results
References
Chapter 5. Nonlinear Guided Waves
5.1. Introduction
5.2. Background on guided wave propagation
5.3. Self Interaction
5.3.1. Basic principles
5.3.2. Lamb waves in plate
5.3.3. Shear horizontal waves in plate
5.3.4. Axisymmetric waves in pipe
5.3.5. Flexural waves in pipe 5.4. Mutual interaction in plate
5.4.1. Basic principles
5.4.2. Collinear waves
5.4.3. Non-collinear waves
5.5. Actuation of primary waves and
About the Author: Kyung-Young Jhang received his PhD from Tokyo Institute of Technology, Japan in 1991. He is currently a Professor and the Chair of Mechanical Engineering at Hanyang University. His research focuses on the area of linear & nonlinear ultrasonics for NDT&E, laser ultrasonics and laser-material intraction, ultrasonic and optical measurements and signal & image processing. He was Vice-president of Korean Society for NDT and Editor-in-Chief of Journal of the Korean Society for NDT (2012-2017).
