November 30, 2020

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Acoustic Emission in Friction

Acoustic Emission in Friction
Author : Victor M. Baranov,Evgeny M. Kudryavtsev,Gennady .A. Sarychev,Vladimir M. Schavelin
Publisher : Elsevier
Release Date : 2011-07-29
Category : Technology & Engineering
Total pages :232
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Acoustic Emission in Friction is devoted to acoustic, mainly ultrasonic, emission that occurs in friction of machine components. Its crucial novelty is in systematizing the advances in its use for monitoring technical systems, especially in the important nuclear power industry. Written by four well-known experts from the main nuclear research university in Russia, this book covers the following areas: All the sources of acoustic emission in friction The theory of acoustic emission The effects of surface conditions, load and velocity on acoustic emission The equipment for registration and monitoring of acoustic emission Unique data from acoustic emission control under various testing conditions in friction units of machinery for nuclear industry machinery There is much emphasis on the comparatively new and rapidly developing tribology of nuclear power engineering. Although a substantial part of the experimental data relates to this specific field of engineering, the universality of the method is shown and its application is possible wherever the field inspection of friction units is necessary. Calculation expressions describing main characteristics of AE registered in friction units Describes new set-ups for studying the tribological behaviour of nuclear engineering materials Presents the theory of the acoustic emission method in friction units

Acoustic Emission, Internal Friction and Young's Modulus in a Mechanically Fatigued GFRP Composite and MACOR, a Glass-ceramic Composite

Acoustic Emission, Internal Friction and Young's Modulus in a Mechanically Fatigued GFRP Composite and MACOR, a Glass-ceramic Composite
Author : Karl Andre Tebeau
Publisher : Unknown
Release Date : 1991
Category : Acoustic emission
Total pages :330
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Acoustic Emission Testing

Acoustic Emission Testing
Author : Rhys Pullin,Karen M. Holford,S.L. Evans,Janice M. Dulieu-Barton
Publisher : Trans Tech Publications Ltd
Release Date : 2006-02-15
Category : Technology & Engineering
Total pages :452
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Volume is indexed by Thomson Reuters CPCI-S (WoS). The main objective of this very up-to-date collection of papers is to gather together the latest information on the state of acoustic emission (AE) testing, with particular emphasis being placed on scientific and technical developments. The book covers a wide range of activities relevant to the acoustic emission of engineering structures and systems; including data processing, analytical techniques and experimental case-studies.

A Simplified Approach for the Calculation of Acoustic Emission in the Case of Friction-induced Noise and Vibration

A Simplified Approach for the Calculation of Acoustic Emission in the Case of Friction-induced Noise and Vibration
Author : Anonim
Publisher : Unknown
Release Date : 2015
Category :
Total pages :129
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Abstract: The acoustic response associated with squeal noise radiations is a hard issue due to the need to consider non-linearities of contact and friction, to solve the associated nonlinear dynamic problem and to calculate the noise emissions due to self-excited vibrations. In this work, the focus is on the calculation of the sound pressure in free space generated during squeal events. The calculation of the sound pressure can be performed by the Boundary Element Method (BEM). The inputs of this method are a boundary element model, a field of normal velocity characterized by a unique frequency. However, the field of velocity associated with friction-induced vibrations is composed of several harmonic components. So, the BEM equation has to be solved for each frequency and in most cases, the number of harmonic components is significant. Therefore, the computation time can be prohibitive. The reduction of the number of harmonic component is a key point for the quick estimation of the squeal noise. The proposed approach is based on the detection and the selection of the predominant harmonic components in the mean square velocity. It is applied on two cases of squeal and allows us to consider only few frequencies. In this study, a new method will be proposed in order to quickly well estimate the noise emission in free space. This approach will be based on an approximated acoustic power of brake system which is assumed to be a punctual source, an interpolated directivity and the decrease of the acoustic power levels. This method is applied on two classical cases of squeal with one and two unstable modes. It allows us to well reconstruct the acoustic power levels map. Several error estimators are introduced and show that the reconstructed field is close to the reference calculated with a complete BEM. Abstract : Highlights: Quasi-periodic non-linear vibration and noise for a disc/pad system with friction. Analysis of sound pressure radiated and level of acoustic pressure. A simplified approach for the calculation of squeal noise.

Acoustic Emission

Acoustic Emission
Author : Wolfgang Sachse,Kusuo Yamaguchi,James Roget
Publisher : ASTM International
Release Date : 1991-01-01
Category : Acoustic emission testing.
Total pages :450
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Papers presented at the symposium held in Charlotte, NC, March 1989, examine the phenomenon in which elastic or stress waves are emitted from a rapid, localized change of strain energy in a material. The first section focuses on AE sensors and systems. The second deals with fundamental investigation

Acoustic Emission

Acoustic Emission
Author : Wojciech Sikorski
Publisher : BoD – Books on Demand
Release Date : 2012-03-02
Category : Technology & Engineering
Total pages :410
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Acoustic emission (AE) is one of the most important non-destructive testing (NDT) methods for materials, constructions and machines. Acoustic emission is defined as the transient elastic energy that is spontaneously released when materials undergo deformation, fracture, or both. This interdisciplinary book consists of 17 chapters, which widely discuss the most important applications of AE method as machinery and civil structures condition assessment, fatigue and fracture materials research, detection of material defects and deformations, diagnostics of cutting tools and machine cutting process, monitoring of stress and ageing in materials, research, chemical reactions and phase transitions research, and earthquake prediction.

Solid-State Welding: Friction and Friction Stir Welding Processes

Solid-State Welding: Friction and Friction Stir Welding Processes
Author : Esther Titilayo Akinlabi,Rasheedat Modupe Mahamood
Publisher : Springer Nature
Release Date : 2020-01-06
Category : Technology & Engineering
Total pages :145
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This book presents critical information on the principles and operation of friction welding, friction stir welding, and friction stir processing enhanced with many robust illustrations. It explains the application of these technologies and the current research efforts in the field. The authors explain in detail the advantages offered by these welding processes, in particular their ability to join dissimilar materials not possible to weld in the past. Written for graduate students, researchers, and industrial professionals, the book reinforces concepts presented with case studies on the experimental analysis of welding the dissimilar materials of copper and aluminum, and on friction stir processing.

Intelligent Acoustic Emission Sensing in Machining for Tool Condition Monitoring

Intelligent Acoustic Emission Sensing in Machining for Tool Condition Monitoring
Author : Chi-Liang Jiaa
Publisher : Unknown
Release Date : 1989
Category : Acoustic emission testing
Total pages :362
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Acoustic Emission Testing

Acoustic Emission Testing
Author : Christian U. Grosse,Masayasu Ohtsu
Publisher : Springer Science & Business Media
Release Date : 2008-07-12
Category : Technology & Engineering
Total pages :406
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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.

Progress in Acoustic Emission

Progress in Acoustic Emission
Author : Anonim
Publisher : Unknown
Release Date : 1992
Category : Acoustic emission
Total pages :129
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Acoustic Emission and Related Non-destructive Evaluation Techniques in the Fracture Mechanics of Concrete

Acoustic Emission and Related Non-destructive Evaluation Techniques in the Fracture Mechanics of Concrete
Author : Masayasu Ohtsu
Publisher : Woodhead Publishing
Release Date : 2020-10-01
Category : Technology & Engineering
Total pages :330
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Acoustic Emission and Related Non-destructive Evaluation Techniques in the Fracture Mechanics of Concrete: Fundamentals and Applications, Second Edition presents innovative Acoustic Emission (AE) and related non-destructive evaluation (NDE) techniques that are used for damage detection and inspection of aged and deteriorated concrete structures. This new edition includes multi-modal applications such as DIC, thermography, X-ray and in-situ implementations, all of which are helpful in better understanding feasibility and underlying challenges. This new edition is an essential resource for civil engineers, contractors working in construction, and materials scientists working both in industry and academia. Completely updated, with a new chapter on multi-technique damage monitoring Presents new applications and novel technologies on AE and related NDT in the fracture mechanics of concrete Features contributions from recognized world-leaders in the application of acoustic emission (AE) and NDE techniques used for the damage assessment of concrete and concrete structures

Soviet Journal of Friction and Wear

Soviet Journal of Friction and Wear
Author : Anonim
Publisher : Unknown
Release Date : 1985
Category : Friction
Total pages :129
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Advances in Acoustic Emission Technology

Advances in Acoustic Emission Technology
Author : Gongtian Shen,Junjiao Zhang,Zhanwen Wu
Publisher : Springer
Release Date : 2019-06-04
Category : Science
Total pages :451
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This volume collects the papers from the World Conference on Acoustic Emission 2017 (WCAE-2017) in Xi'an, China. The latest research and applications of acoustic emission (AE) are explored, with a particular emphasis on detecting and processing AE signals, the development of AE instrument and testing standards, AE of materials, engineering structures and systems, including the processing of collected data and analytical techniques. Numerous case studies are also included. This proceedings volume will appeal to students, professors and researchers working in these fields as physicists and/or engineers.

Tunnelling and Tunnel Mechanics

Tunnelling and Tunnel Mechanics
Author : Dimitrios Kolymbas
Publisher : Springer Science & Business Media
Release Date : 2005-12-06
Category : Science
Total pages :438
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This book covers not only practical aspects but also the underlying theoretical approaches. It also covers the fundamentals of rock mechanics. The book addresses not only students but also professionals who are interested to understand the underlying principles and methods and – possibly – to further develop them. Emphasis is given to the mechanical approach rather than to hardly tractable empirical statements. The text is concise and comprises a large list of citations.

Friction Stir Welding and Processing VIII

Friction Stir Welding and Processing VIII
Author : Rajiv Mishra,Murray Mahoney,Yutaka Sato,Yuri Hovanski
Publisher : Springer
Release Date : 2016-12-01
Category : Technology & Engineering
Total pages :300
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This collection focuses on all aspects of science and technology related to friction stir welding and processing.