A comprehensive guide to lamb waves / Nitesh Prakash Yelve (editor).

Format:

Book

Contributor:

Yelve, Nitesh Prakash, editor.

Series:

Physics Research and Technology

Language:

English

Subjects (All):

Lamb waves.

Physical Description:

1 online resource (184 pages) : illustrations

Place of Publication:

New York, New York State : Nova Science Publishers, [2021]

Summary:

"This book presents the fundamental concept of Lamb wave propagation and its application for damage detection in metals and composites. The editor has taken utmost care to include a range of applications of Lamb waves, in the linear and nonlinear domains, in this book. Various damage location algorithms making use of linear characteristics of Lamb waves and a few case studies making use of nonlinear characteristics Lamb waves for damage detection are presented in a simple-to-understand way. Readers will find detailed descriptions for experiments, simulation, and signal processing. The last chapter that focuses on the evaluation of fatigue-induced material nonlinearity would help readers to understand the complex applications of Lamb waves. The forthcoming books in this series would include state-of-the-art applications of guided waves for damage detection, material characterization, and estimation of the remnant useful life of engineering structures"-- Provided by publisher.

Contents:

Intro

Contents

Preface

Chapter 1

Damage Detection in Thin Plates Using Lamb Waves

Abstract

1. Introduction

2. Numerical Simulations

3. Signal Processing Techniques

4. Transmission and Reception of Lamb Waves and Experiments

5. Algorithms for Damage Detection

Conclusion

References

Chapter 2

Locating Damages in Thin Aluminium Plates Using Lamb Waves and a Genetic Optimization Approach

2. Prerequisites of Lamb Waves

3. Experimental Setup for Actuation

and Reception of Dispersive Lamb Waves

3.1. Material Properties of the Specimen and PW

3.2. Schematic of Experimental Setup

3.3. Excitation and Acquisition Settings of Experiments

4. Astroid Algorithm

5. Results and Discussions

Chapter 3

Lamb Wave Propagation in Transversely Isotropic Material

2. Transversely Isotropic Material

3. Velocity Dependence in HTI Material

4. Numerical Study

Chapter 4

Fundamentals of Lamb Wave and Ultrasonic Nondestructive Characterization of Laminated Composite Plates

2. Method Description

2.1. Lamb Wave Generation

2.2. Stress-Strain Relationship and Properties Calculation for Angle Lamina

3. Experimental Analysis

3.1. Fabrication of Composite Plate

3.2. Experimental Setup

3.3. Finite Element (FE) Framework

3.4. Structural Modelling

3.5. Mesh Size and Time Step Calculation

3.6. Contact Pair Modelling

4. Results and Discussion

4.1. Linear Results (Mode Conversion)

4.2. Higher Harmonics Generation

Summary and Conclusion

Acknowledgments

Chapter 5

Effect of Partial Debonding of Piezo-Actuator on Lamb Wave Behavior

2. Experimental WORK.

2.1. Specimen Fabrication

2.2. Experimental Setup

2.3. Input Signal

2.4. Selection of Frequency

3. Finite Element Simulation

3.1. Selection of Element Size

3.2. Selection of Time Step Size

3.3. FE Modeling of Specimen

3.4. FE Modeling of Contact Nonlinearity

4. Experimental and FE Simulation Results

4.1. Signal Processing Methods

4.1.1. Frequency Representation

4.1.2. Time-Frequency Representation

4.2. Results of the Experiments

4.3. Results of the FE Simulation

5. Spectral Damage Index

5.1. Formulation of the SDI

Chapter 6

Evaluation of Material Nonlinearity in Fatigued Samples Using an Improved Lamb-Wave Nonlinear Parameter

2. Theoretical Fundamentals of Lamb Waves

3. Amplitude and Physics-Based Nonlinear Parameters for Lamb Waves

3.1. Amplitude-based Nonlinearity Parameter

3.2. Physics-Based Nonlinear Parameter

4. Normalization Factor to Obtain Unscaled Spectral Amplitudes of Lamb Wave Harmonics

5. Evaluation Procedure of Material Nonlinearity

6. Numerical Study of Nonlinear Lamb Wave

6.1. Preparation of the Finite Element (FE) Model of Specimen

7. Results and Discussions

Appendix A. Normalization of the FFT Amplitudes

About the Editor

Index

Blank Page.

Notes:

Description based on print version record.

Includes index.

ISBN:

1-5361-9477-8

OCLC:

1243514156