Nonlinear Ultrasonic Guided Waves - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nonlinear Ultrasonic Guided Waves write by Cliff J. Lissenden. This book was released on 2024-06-28. Nonlinear Ultrasonic Guided Waves available in PDF, EPUB and Kindle.
Measurement of Nonlinear Ultrasonic Characteristics
Measurement of Nonlinear Ultrasonic Characteristics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Measurement of Nonlinear Ultrasonic Characteristics write by Kyung-Young Jhang. This book was released on 2020-01-14. Measurement of Nonlinear Ultrasonic Characteristics available in PDF, EPUB and Kindle. Conventional ultrasonic methods based on ultrasonic characteristics in the linear elastic region are mainly sensitive to mature defects but are much less responsive to micro-damage or incipient material degradation. Recently, nonlinear ultrasonic characteristics beyond the linear ultrasonic amplitude range have been studied as a method for overcoming this limitation, and hence, many researchers are engaged in theoretical, experimental, and various application studies. However, the nonlinear ultrasonic characteristics are quite exacting compared to the linear phenomena so that they require vast experience and high proficiency in order to obtain proper experimental data. Actually, many researchers, especially beginners including graduate students, have difficulty in reliably measuring nonlinear ultrasonic characteristics. This book provides key technological know-how from experts with years of experience in this field, which will help researchers and engineers to obtain a clear understanding and high quality data in the nonlinear ultrasonic experiments and applications.
Mutual Nonlinear Interaction of Ultrasonic Guided Waves in Plate, Applications for NDE.
Mutual Nonlinear Interaction of Ultrasonic Guided Waves in Plate, Applications for NDE. - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Mutual Nonlinear Interaction of Ultrasonic Guided Waves in Plate, Applications for NDE. write by Mostafa Hasanian. This book was released on 2019. Mutual Nonlinear Interaction of Ultrasonic Guided Waves in Plate, Applications for NDE. available in PDF, EPUB and Kindle. Nondestructive Evaluation (NDE) and Structural Health Monitoring (SHM) of materials are investigated through nonlinear ultrasonics. The material nonlinearity associated with microstructural features distorts the ultrasonic wave packet, altering the frequency spectrum. Since microstructural changes precede macroscale damage, nonlinear ultrasonics provides the unique opportunity to diagnose material degradation early in its progression. Thus, the unique sensitivity of nonlinear ultrasonic waves to microstructural damage is the motivation for the current study to develop more reliable methods to detect early damage in materials. Ultrasonic guided waves, which travel in a bounded medium, are of great interest due to particular advantages such as rapid scanning of plates. The focus of this dissertation is on the mutual interaction of guided waves in a plate, which occurs when multiple waves propagating in the plate mix together. The wave vectors are considered to form the nonlinear stress fields associated with the interaction of two different guided waves with arbitrary mixing angle. By solving the differential equations, the conditions that generate the strong and cumulative nonlinear perturbations are found. Based on internal resonance conditions, the wave triplets (two primary waves and the secondary wave) determined form the basis for experimental studies and numerical simulations. An analytical model is given which simulates the interaction of guided waves with finite wave packets. The rest of the dissertation is on demonstrating the proposed experimental techniques and then exploring the results. Codirectional shear horizontal guided wave mixing is considered, where limited cumulative behavior of out-of-plane displacements is used for early damage characterization. In addition, interaction counter-propagating shear horizontal guided waves is studied. The results indicate the strong generation of a secondary wave field that travels independently from primary wave packets.
Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation
Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation write by Tribikram Kundu. This book was released on 2018-10-19. Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation available in PDF, EPUB and Kindle. This multi-contributed volume provides a practical, applications-focused introduction to nonlinear acoustical techniques for nondestructive evaluation. Compared to linear techniques, nonlinear acoustical/ultrasonic techniques are much more sensitive to micro-cracks and other types of small distributed damages. Most materials and structures exhibit nonlinear behavior due to the formation of dislocation and micro-cracks from fatigue or other types of repetitive loadings well before detectable macro-cracks are formed. Nondestructive evaluation (NDE) tools that have been developed based on nonlinear acoustical techniques are capable of providing early warnings about the possibility of structural failure before detectable macro-cracks are formed. This book presents the full range of nonlinear acoustical techniques used today for NDE. The expert chapters cover both theoretical and experimental aspects, but always with an eye towards applications. Unlike other titles currently available, which treat nonlinearity as a physics problem and focus on different analytical derivations, the present volume emphasizes NDE applications over detailed analytical derivations. The introductory chapter presents the fundamentals in a manner accessible to anyone with an undergraduate degree in Engineering or Physics and equips the reader with all of the necessary background to understand the remaining chapters. This self-contained volume will be a valuable reference to graduate students through practising researchers in Engineering, Materials Science, and Physics. Represents the first book on nonlinear acoustical techniques for NDE applications Emphasizes applications of nonlinear acoustical techniques Presents the fundamental physics and mathematics behind nonlinear acoustical phenomenon in a simple, easily understood manner Covers a variety of popular NDE techniques based on nonlinear acoustics in a single volume
Nonlinear Ultrasonic Guided Waves for Quantitative Life Prediction of Structures with Complex Geometries
Nonlinear Ultrasonic Guided Waves for Quantitative Life Prediction of Structures with Complex Geometries - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nonlinear Ultrasonic Guided Waves for Quantitative Life Prediction of Structures with Complex Geometries write by Thibaut Bernard Autrusson. This book was released on 2009. Nonlinear Ultrasonic Guided Waves for Quantitative Life Prediction of Structures with Complex Geometries available in PDF, EPUB and Kindle. Material damage such as dislocations and microcracks are characteristic of early stages of fatigue. Accumulation of these nascent cracks leads to non-linear elastic response of the material. These non-linearities can be detected from harmonic generation for propagating elastic waves. The long term goal of this study is to investigate the non-linear elastic propagation in parts with complex geometry. Cellular Automata is introduced as a new simulation method, in order to develop new analysis on quadratic non-linearities. An existing linear code was progressively modified to take into account a different constitutive law. Also the boundary conditions need to be reviewed to ensure free stress with the non-linear behavior. The propagation of the longitudinal wave is investigated in detail. Numerical accuracy is validated from comparison with a closed, for both linear and non-linear code. The reflection of the non-linear P-wave gives confirmation for the correct treatment of the boundary condition. Finally the capabilities of the Cellular Automata code are underlined for reflection of Lamb waves for various boundary conditions.
