Theory And Uses Of Acoustic Emissions

Author : Justin K. Burnett
Publisher : Unknown
Page : 0 pages
File Size : 52,8 Mb
Release : 2011
Category : Acoustic emission testing
ISBN : 1612099602

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Theory and Uses of Acoustic Emissions by Justin K. Burnett Pdf

Acoustic Emission (AE) is a naturally occurring phenomenon whereby external stimuli, such as mechanical loading, generate sources of elastic waves. AE occurs when a small surface displacement of a material is produced due to stress waves generated when there is a rapid release of energy in a material, or on its surface. This new book presents current research in the study of the theory and uses of acoustic emissions. Topics discussed include acoustic emission from rocks generated in the course of a variety of experiments; applying the acoustic emission technique to estimate the defect density and strength of adhesively bonded couplings and structural health monitoring of ships and offshore structures using acoustic emission testing. (Imprint: Nova Press)

Author : Sotirios J. Vahaviolos
Publisher : ASTM International
Page : 257 pages
File Size : 53,6 Mb
Release : 1999
Category : Acoustic emission testing
ISBN : 9780803124981

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Acoustic Emission by Sotirios J. Vahaviolos Pdf

Sixteen papers originally presented at the symposium of the same name held on January 22-23, 1998 explore the use of acoustic emission (AE) for the location and evaluation of materials strengths and faults in a variety of industrial applications. Specific topics include the characterization of focal

Author : Zinoviy Nazarchuk,Valentyn Skalskyi,Oleh Serhiyenko
Publisher : Springer
Page : 283 pages
File Size : 55,5 Mb
Release : 2017-01-23
Category : Technology & Engineering
ISBN : 9783319493503

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Acoustic Emission by Zinoviy Nazarchuk,Valentyn Skalskyi,Oleh Serhiyenko Pdf

This monograph analyses in detail the physical aspects of the elastic waves radiation during deformation or fracture of materials. It presents the methodological bases for the practical use of acoustic emission device, and describes the results of theoretical and experimental researches of evaluation of the crack growth resistance of materials, selection of the useful AE signals. The efficiency of this methodology is shown through the diagnostics of various-purpose industrial objects. The authors obtain results of experimental researches with the help of the new methods and facilities.

Author : Valentyn Skalskyi,Zinoviy Nazarchuk
Publisher : Springer Nature
Page : 356 pages
File Size : 46,7 Mb
Release : 2024-01-17
Category : Science
ISBN : 9789819940325

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Magnetoelastic Acoustic Emission by Valentyn Skalskyi,Zinoviy Nazarchuk Pdf

The book presents theoretical and experimental studies to establish the relationship between volume jumps of the 90° domain wall in a ferromagnetic material and the magnitude of the half-space surface displacement caused by it. A method of evaluating the influence of the external magnetic field on the stress intensity factor at the tip of the crack-like defects in ferromagnets is discussed. The influence of hydrogen on the generation of magneto-elastic acoustic emission signals of ferromagnets is described. The features of magneto-elastic acoustic emission due to the presence of plastic deformation, structural changes, and volumetric damage in such structural materials are shown.

Author : Dan Li
Publisher : Springer
Page : 136 pages
File Size : 40,9 Mb
Release : 2018-06-23
Category : Technology & Engineering
ISBN : 9789811083488

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Rail Crack Monitoring Using Acoustic Emission Technique by Dan Li Pdf

This thesis provides an innovative strategy for rail crack monitoring using the acoustic emission (AE) technique. The field study presented is a significant improvement on laboratory studies in the literature in terms of complex rail profile and crack conditions as well as high operational noise. AE waves induced by crack propagation, crack closure, wheel-rail impact and operational noise were obtained through a series of laboratory and field tests, and analyzed by wavelet transform (WT) and synchrosqueezed wavelet transform (SWT). A wavelet power-based index and the enhanced SWT scalogram were sequentially proposed to classify AE waves induced by different mechanisms according to their energy distributions in the time–frequency domain. A novel crack sizing method taking advantage of crack closure-induced AE waves was developed based on fatigue tests in the laboratory. The propagation characteristics of AE waves in the rail were investigated, and Tsallis synchrosqueezed wavelet entropy (TSWE) with time was finally brought forward to detect and locate rail cracks in the field. The proposed strategy for detection, location and sizing of rail cracks helps to ensure the safe and smooth operation of the railway system. This thesis is of interest to graduate students, researchers and practitioners in the area of structural health monitoring.

Author : Vincent P. Drnevich,Drnevich,Carol Gray
Publisher : ASTM International
Page : 224 pages
File Size : 49,6 Mb
Release : 1981-11
Category : Science
ISBN : 0803107889

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Acoustic Emissions in Geotechnical Engineering Practice by Vincent P. Drnevich,Drnevich,Carol Gray Pdf

Author : Warren P. Mason
Publisher : Elsevier
Page : 392 pages
File Size : 51,8 Mb
Release : 2012-12-02
Category : Science
ISBN : 9780323152518

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Physical Acoustics V15 by Warren P. Mason Pdf

Physical Acoustics: Principles and Methods, Volume XV is a four-chapter text that covers the history of ultrasonics, interdigital transducers, theory of resonance scattering, and acoustic emission. Chapter 1 provides the history of ultrasonics and the developments of its application in crystal transducers, oscillators, selective wave filters, underwater sound, dentistry, and medicine. Chapter 2 is a comprehensive account of the use of circuit model analysis to design interdigital transducers (IDTs) for surface acoustic wave (SAW) devices. This chapter also looks into the total filter design problem for the important case of SAW filters composed solely of IDTs and matching circuits. Chapter 3 discusses the resonance scattering theory, its application to acoustic-and elastic-wave scattering, and the relevant experiments. Chapter 4 deals with the optical detection of acoustic emissions, acoustic emissions during various transformations, and dislocation effects. Researchers in the fields of electronics technology and applied and engineering mechanics will find this book invaluable.

Author : Markus G. R. Sause,Elena Jasiūnienė
Publisher : Springer Nature
Page : 292 pages
File Size : 54,8 Mb
Release : 2021
Category : Aerospace engineering
ISBN : 9783030721923

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Structural Health Monitoring Damage Detection Systems for Aerospace by Markus G. R. Sause,Elena Jasiūnienė Pdf

This open access book presents established methods of structural health monitoring (SHM) and discusses their technological merit in the current aerospace environment. While the aerospace industry aims for weight reduction to improve fuel efficiency, reduce environmental impact, and to decrease maintenance time and operating costs, aircraft structures are often designed and built heavier than required in order to accommodate unpredictable failure. A way to overcome this approach is the use of SHM systems to detect the presence of defects. This book covers all major contemporary aerospace-relevant SHM methods, from the basics of each method to the various defect types that SHM is required to detect to discussion of signal processing developments alongside considerations of aerospace safety requirements. It will be of interest to professionals in industry and academic researchers alike, as well as engineering students. This article/publication is based upon work from COST Action CA18203 (ODIN - http://odin-cost.com/), supported by COST (European Cooperation in Science and Technology). COST (European Cooperation in Science and Technology) is a funding agency for research and innovation networks. Our Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.

Author : R. E. Gray
Publisher : ASTM International
Page : 219 pages
File Size : 46,5 Mb
Release : 1981
Category : Electronic
ISBN : 8210379456XXX

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Acoustic Emissions in Geotechnical Engineering Practice by R. E. Gray Pdf

Author : Gongtian Shen,Zhanwen Wu,Junjiao Zhang
Publisher : Springer
Page : 694 pages
File Size : 49,8 Mb
Release : 2014-09-25
Category : Science
ISBN : 9781493912391

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Advances in Acoustic Emission Technology by Gongtian Shen,Zhanwen Wu,Junjiao Zhang Pdf

This volume collects the papers from the 2013 World Conference on Acoustic Emission in Shanghai. The latest research and applications of Acoustic Emission (AE) are explored, with particular emphasis on detecting and processing of AE signals, development of AE instrument and testing standards, AE of materials, engineering structures and systems, including the processing of collected data and analytical techniques as well as experimental case studies.

Author : Sylvie Le Hégarat-Mascle,Isabelle Bloch,Emanuel Aldea
Publisher : Springer Nature
Page : 318 pages
File Size : 55,6 Mb
Release : 2022-09-29
Category : Mathematics
ISBN : 9783031178016

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Belief Functions: Theory and Applications by Sylvie Le Hégarat-Mascle,Isabelle Bloch,Emanuel Aldea Pdf

This book constitutes the refereed proceedings of the 7th International Conference on Belief Functions, BELIEF 2022, held in Paris, France, in October 2022. The theory of belief functions is now well established as a general framework for reasoning with uncertainty, and has well-understood connections to other frameworks such as probability, possibility, and imprecise probability theories. It has been applied in diverse areas such as machine learning, information fusion, and pattern recognition. The 29 full papers presented in this book were carefully selected and reviewed from 31 submissions. The papers cover a wide range on theoretical aspects on mathematical foundations, statistical inference as well as on applications in various areas including classification, clustering, data fusion, image processing, and much more.

Author : I. G. Scott
Publisher : CRC Press
Page : 264 pages
File Size : 54,7 Mb
Release : 1991
Category : Science
ISBN : 2881243525

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Basic Acoustic Emission by I. G. Scott Pdf

Examines the capabilities and scope of acoustic emission, a noninvasive, nondestructive testing technique that exploits the noises made when materials deform or fracture. Scott summarizes the basic science involved, particularly stress waves, interfaces, and sources and standards; explains methodology; and describes applications ranging from laboratory research to the aircraft industry. The bookclub price is $35. Acidic paper. Annotation copyrighted by Book News, Inc., Portland, OR

Author : Julian Ross Frederick
Publisher : Unknown
Page : 92 pages
File Size : 43,8 Mb
Release : 1972
Category : Acoustic emission
ISBN : UOM:39015095329549

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Use of Acoustic Emission in Nondestructive Testing by Julian Ross Frederick Pdf

A model based on the activation of dislocation sources was developed for predicting the effect of microstructure on acoustic emission. The model predicts a minimum dislocation source length and slip distance below which no emission will be detected. Experimental results obtained on various metals and alloys having different microstructures substantiate the model. The effect of grain size on the acoustic emission from 99.99% aluminum and 99.9% copper suggests that macroscopic yielding in these metals occurs with the help of dislocation pile-ups that have been held up by grain boundaries and that the emission results from the activation of dislocation sources near the grain boundaries. Experimental results obtained under conditions of very low background noise level show that some metals produce acoustic emission when the applied load is removed. The amount of emission that is observed correlates with the magnitude of the Bauschinger effect in the metal. In those metals that show an 'unload' acoustic emission effect there is the possibility of using it to investigate the magnitude of the residual stress in a specimen. Creep and fatigue phenomena can also be studied by the use of acoustic emission. (Author Modified Abstract).

Author : Christian U. Grosse,Masayasu Ohtsu
Publisher : Springer Science & Business Media
Page : 403 pages
File Size : 44,5 Mb
Release : 2008-07-12
Category : Technology & Engineering
ISBN : 9783540699729

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Acoustic Emission Testing by Christian U. Grosse,Masayasu Ohtsu Pdf

Acoustic Emission (AE) techniques have been studied in civil engineering for a long time. The techniques are recently going to be more and more applied to practical applications and to be standardized in the codes. This is because the increase of aging structures and disastrous damages due to recent earthquakes urgently demand for maintenance and retrofit of civil structures in service for example. It results in the need for the development of advanced and effective inspection techniques. Thus, AE techniques draw a great attention to diagnostic applications and in material testing. The book covers all levels from the description of AE basics for AE beginners (level of a student) to sophisticated AE algorithms and applications to real large-scale structures as well as the observation of the cracking process in laboratory specimen to study fracture processes.

Author : Christian U. Grosse,Masayasu Ohtsu,Dimitrios G. Aggelis,Tomoki Shiotani
Publisher : Springer Nature
Page : 752 pages
File Size : 41,5 Mb
Release : 2021-07-14
Category : Technology & Engineering
ISBN : 9783030679361

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Acoustic Emission Testing by Christian U. Grosse,Masayasu Ohtsu,Dimitrios G. Aggelis,Tomoki Shiotani Pdf

This book provides an introduction to Acoustic Emission Testing and its applications to different materials like concrete, steel, ceramics, geotechnical materials, polymers, biological structures and wood. Acoustic Emission Techniques (AET) techniques have been studied in engineering for a long time. The techniques are applied more and more to practical investigations and are more and more standardized in codes. This is because the degradation of structures due to ageing urgently demand for maintenance and rehabilitation of structures in service. It results in the need for the development of advanced and efficient inspection techniques. In mechanical engineering and concerning the monitoring of machines and mechanical components, AE is a widely accepted observing deterioration in the frame of structural health monitoring. The advantages of AE like sensitivity, damage localization potential, non-intrusive nature as well as developments in signal analysis and data transmission allow applications that could not be considered decades ago. As such, AE techniques draw great attention to diagnostic applications and in material testing. This book covers all levels from the description of AE basics for AE beginners (level of a student) to sophisticated AE algorithms and applications to real large-scale structures as well as the observation of the cracking process in laboratory specimen to study fracture processes. This book has proved its worth over the past twelve years. Now in its second edition, it will be a resource that sets the standard and equips readers for the future. All chapters from the 1st edition have been updated and rewritten and eight extra chapters (e.g also regarding AE tomography, AE in plate-like structures and AE for investigations of hardening of fresh concrete) have been added.