Acoustic Emission Signal Analysis and Damage Mode Identification of Composite Wind Turbine Blades
Acoustic Emission Signal Analysis and Damage Mode Identification of Composite Wind Turbine Blades

Author: Pengfei Liu

Publisher: Elsevier

Published: 2023-05-20

Total Pages: 366

ISBN-13: 0323886477

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Acoustic Emission Signal Analysis and Damage Mode Identification of Composite Wind Turbine Blades covers both the underlying theory and various techniques for effective structural monitoring of composite wind turbine blades via acoustic emission signal analysis, helping readers solve critical problems such as noise elimination, defect detection, damage mode identification, and more. Author Pengfei Liu introduces techniques for identifying and analyzing progressive failure under tension, delamination, damage localization, adhesive composite joint failure, and other degradation phenomena, outlining methods such as time-difference, wavelet, machine learning, and more including combined methods. The disadvantages and advantages of using each method are covered as are techniques for different blade-lengths and various blade substructures. Piezoelectric sensors are discussed as is experimental analysis of damage source localization. The book also takes great lengths to let readers know when techniques and concepts discussed can be applied to composite materials and structures beyond just wind turbine blades. - Features fundamental acoustic emission theories and techniques for monitoring the structural integrity of wind turbine blades - Covers sensor arrangements, noise elimination, defect detection, and dominating damage mode identification using acoustic emission techniques - Outlines the wavelet method, the time-difference defect detection method, and damage mode identification techniques using machine learning - Discusses how the techniques covered can be extended and adapted for use in other composite structures under complex loads and in different environments

Fiber-Reinforced Composites
Fiber-Reinforced Composites

Author: P.K. Mallick

Publisher: CRC Press

Published: 2007-11-19

Total Pages: 640

ISBN-13: 1420005987

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This third edition of a bestseller offers a current perspective on the mechanics, characteristics, test methods, applications, manufacturing processes, and design aspects of composites. Highlighting materials such as nanocomposites and smart materials, the book contains new information on material substitution, cost analysis, nano- and natural fibers, fiber architecture, carbon-carbon composites, thermoplastics matrix composites, resin transfer molding, and test methods such as fiber bundle tests and interlaminar fracture measurements. It presents a new chapter on polymer-based nanocomposites. New examples and additional problems emphasize problem-solving skills used in real-world applications.

Fundamentals of Fibre Reinforced Composite Materials
Fundamentals of Fibre Reinforced Composite Materials

Author: A.R. Bunsell

Publisher: CRC Press

Published: 2021-03-23

Total Pages: 376

ISBN-13: 0429680945

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Fibre reinforced composite materials are showing sustained growth in an ever widening range of applications from food trays to spacecraft as well as contributing to resolving environmental problems, including enabling the forthcoming hydrogen economy to be realised. This second edition of Fundamentals of Fibre Reinforced Composite Materials has been fully updated throughout, providing an authoritative and modern introduction to the topic with a brief history of composite development, a review of composite applications, manufacture and markets, types of fibres and matrices used, and their properties with a detailed introduction into the computer simulation of composite behaviour. With extensive sets of sample problems accompanying each chapter, this book is ideally suited to undergraduate and graduate students of materials science, structural, mechanical, and aeronautical engineering, polymer science, metallurgy, and other courses. It will also be of use as a reference to researchers and engineers working with composite materials and material scientists in general. Features: Presents thorough discussions on composite history, composite applications and markets, types of fibres and resins used, and their respective properties Relates mathematical concepts to the structure of the material under discussion leading to the quantitative evaluation of safety factors Provides numerous sets of sample problems in each chapter

Adapted Wavelet Analysis
Adapted Wavelet Analysis

Author: Mladen Victor Wickerhauser

Publisher: CRC Press

Published: 1996-04-17

Total Pages: 499

ISBN-13: 143986361X

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This detail-oriented text is intended for engineers and applied mathematicians who must write computer programs to perform wavelet and related analysis on real data. It contains an overview of mathematical prerequisites and proceeds to describe hands-on programming techniques to implement special programs for signal analysis and other applications.

Structural Health Monitoring Damage Detection Systems for Aerospace
Structural Health Monitoring Damage Detection Systems for Aerospace

Author: Markus G. R. Sause

Publisher: Springer Nature

Published: 2021

Total Pages: 292

ISBN-13: 3030721922

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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.

Acoustic Emission Testing
Acoustic Emission Testing

Author: Christian U. Grosse

Publisher: Springer Science & Business Media

Published: 2008-07-12

Total Pages: 403

ISBN-13: 3540699724

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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.

In Situ Monitoring of Fiber-Reinforced Composites
In Situ Monitoring of Fiber-Reinforced Composites

Author: Markus G.R. Sause

Publisher: Springer

Published: 2016-06-14

Total Pages: 647

ISBN-13: 3319309544

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“...a comprehensive and well written book, which...will be useful reading for both researchers entering the field and experienced specialists looking for new ideas....a valuable and long-lasting contribution to experimental mechanics.” – Stepan Lomov, KU Leuven This expert volume, an enhanced Habilitation thesis by the head of the Materials Testing Research Group at the University of Augsburg, provides detailed coverage of a range of inspection methods for insitu characterization of fiber-reinforced composites. The failure behavior of fiber reinforced composites is a complex evolution of microscopic damage phenomena. Beyond the use of classical testing methods, the ability to monitor the progression of damage insitu offers new ways to interpret the materials failure modes. Methods covered include digital image correlation, acoustic emission, electromagnetic emission, computed tomography, thermography, shearography, and promising method combinations. For each method, the discussion includes operational principles and practical applications for quality control as well as thoughtful assessment of the method's strengths and weakness so that the reader is equipped to decide which method or methods are most appropriate in a given situation. The book includes extensive appendices covering common experimental parameters influencing comparability of acoustic emission measurements; materials properties for modeling; and an overview of terms and abbreviations.

Acoustic Emission Testing
Acoustic Emission Testing

Author: Christian U. Grosse

Publisher: Springer Nature

Published: 2021-07-14

Total Pages: 752

ISBN-13: 3030679365

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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.

Delamination Behaviour of Composites
Delamination Behaviour of Composites

Author: Srinivasan Sridharan

Publisher: Elsevier

Published: 2008-10-21

Total Pages: 787

ISBN-13: 1845694821

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Given such advantages as low weight compared to strength and toughness, laminated composites are now used in a wide range of applications. Their increasing use has underlined the need to understand their principal mode of failure, delamination. This important book reviews key research in understanding and preventing delamination.The first part of the book reviews general issues such as the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance. Part two describes techniques for detecting and characterising delamination such as piezoelectric sensors, the use of lamb waves and acoustic emission techniques. The next two sections of the book discuss ways of studying and modelling delamination behaviour. The final part of the book reviews research on delamination behaviour in particular conditions such as shell and sandwich structures, z-pin bridging and resin bonding.With its distinguished editor and international team of contributors, Delamination behaviour of composites is a standard reference for all those researching laminated composites and using them in such diverse applications as microelectronics, aerospace, marine, automotive and civil engineering. - Reviews the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance - Discuss ways of studying and modelling delamination behaviour - A standard reference for all those researching laminated composites