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Impact Damage Sensing In Carbon Fiber Polymer Matrix Composite Plates Via Electrical Resistance Measurement
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Book Synopsis Impact Damage Sensing in Carbon Fiber Polymer-matrix Composite Plates Via Electrical Resistance Measurement by : Justin McAndrew
Download or read book Impact Damage Sensing in Carbon Fiber Polymer-matrix Composite Plates Via Electrical Resistance Measurement written by Justin McAndrew and published by . This book was released on 2009 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self-sensing of Damage in Carbon Fiber Polymer-matrix Structural Composites by Electrical Measurement by :
Download or read book Self-sensing of Damage in Carbon Fiber Polymer-matrix Structural Composites by Electrical Measurement written by and published by . This book was released on 2005 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis assesses the ability of carbon fiber polymer-matrix structural composites to sense their own damage. The self-sensing involved electrical measurement. The damage was inflicted by impact at controlled energy levels. The study encompassed damage sensitivity determination, data precision analysis, specimen dimension effects and electrical contact configuration design. The resistance of the segment of the specimen containing the impact point increased upon impact. The resistance obtained by using the four-probe method is a more sensitive, more accurate and more precise (less data scatter) indicator of impact damage than that obtained by using two-probe method. The two-dimensional electric potential/resistance method is much less sensitive than the one-dimensional resistance method. In the two-dimensional method, the resistance method is more sensitive than the potential method. The sensitivity of the potential method is enhanced when the potential gradient line is close to the current line. The electric potential method is effective for damage sensing in carbon fiber polymer-matrix composite when the distance between the current line and potential gradient line is sufficiently small, such as 1.0 mm in the through-thickness direction; it is ineffective when this distance is 2.1 mm or more. The resistance method has no thickness limitation, but it suffers from current path distortion upon damage and consequent reduced sensitivity.
Book Synopsis Structural Health Monitoring of Aerospace Composites by : Victor Giurgiutiu
Download or read book Structural Health Monitoring of Aerospace Composites written by Victor Giurgiutiu and published by Academic Press. This book was released on 2015-09-08 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Health Monitoring of Aerospace Composite Structures offers a comprehensive review of established and promising technologies under development in the emerging area of structural health monitoring (SHM) of aerospace composite structures. Beginning with a description of the different types of composite damage, which differ fundamentally from the damage states encountered in metallic airframes, the book moves on to describe the SHM methods and sensors currently under consideration before considering application examples related to specific composites, SHM sensors, and detection methods. Expert author Victor Giurgiutiu closes with a valuable discussion of the advantages and limitations of various sensors and methods, helping you to make informed choices in your structure research and development. The first comprehensive review of one of the most ardent research areas in aerospace structures, providing breadth and detail to bring engineers and researchers up to speed on this rapidly developing field Covers the main classes of SHM sensors, including fiber optic sensors, piezoelectric wafer active sensors, electrical properties sensors and conventional resistance strain gauges, and considers their applications and limitation Includes details of active approaches, including acousto-ultrasonics, vibration, frequency transfer function, guided-wave tomography, phased arrays, and electrochemical impedance spectroscopy (ECIS), among other emerging methods
Book Synopsis Electrical Contacts by : Milenko Braunovic
Download or read book Electrical Contacts written by Milenko Braunovic and published by CRC Press. This book was released on 2017-12-19 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various factors affect the performance of electrical contacts, including tribological, mechanical, electrical, and materials aspects. Although these behaviors have been studied for many years, they are not widely used or understood in practice. Combining approaches used across the globe, Electrical Contacts: Fundamentals, Applications, and Technology integrates advances in research and development in the tribological, material, and analytical aspects of electrical contacts with new data on electrical current transfer at the micro- and nanoscales. Taking an application-oriented approach, the authors illustrate how material characteristics, tribological behavior, and loading impact the degradation of contacts, formation of intermetallics, and overall reliability and performance. Coverage is divided broadly into three sections, with the first focused on mechanics, tribology, materials, current and heat transfer, and basic reliability issues of electrical contacts. The next section explores applications, such as power connections, electronic connections, and sliding contacts, while the final section presents the diagnostic and monitoring techniques used to investigate and measure phenomena occurring at electrical contact interfaces. Numerous references to current literature reflect the fact that this book is the most comprehensive survey in the field. Explore an impressive collection of data, theory, and practical applications in Electrical Contacts: Fundamentals, Applications, and Technology, a critical tool for anyone investigating or designing electrical equipment with improved performance and reliability in mind.
Book Synopsis Damage Detection of Carbon Fiber Reinforced Polymer Using Electrical Measurement and Analysis of Acoustic Emission Signals by : Heng-Hsueh Chen
Download or read book Damage Detection of Carbon Fiber Reinforced Polymer Using Electrical Measurement and Analysis of Acoustic Emission Signals written by Heng-Hsueh Chen and published by . This book was released on 2013 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon fiber reinforced polymer composites (CFRPs) have been widely used in aerospace, civil engineering and so on in recent decades because of their excellent mechanical properties (high strength and stiffness), low density, long-term durability and high resistances to corrosion, pressure and other harsh environment conditions. Since CFRPs are multiphase materials that consist of polymer matrix and carbon fibers plies. Local separation between plies and/or debonding at fiber-matrix interface may occur during application. Damage in this form of delamination may affect the material properties such as the ability of stress transmission, which leads to component failure in the vehicles or even disastrous loss. Hence, the study of damage detection is necessary to ensure the safety use of CFRPs. In this thesis, we first introduce the tensile test for CFRP sample. The test is conducted by hydraulic wedge grip with electrical potential measurement and acoustic emission sensors, respectively. Continuous wavelet transform is applied to analyze output signals, which enables us to see the differences between unbroken and broken samples. Electrical potential measurement provides direct information from the original output signal about the sample damage, and there is no external sensors needed. Acoustic emission method, on the other hand, helps us to make hypothesis on recognizing different failure modes. Then we study the impact of damage in the form of delamiantion and the damage in the form of hole. By measuring the electrical potential, we estimate the damage location experimentally, and the linear relationship between damage dimension ratio and average/maximum ratio of potential change is developed to estimate the damage size. Then via 3D FEA modeling, we study the undamaged and damaged cases numerically with the same conditions as in the experimental study, and the electrical potential distributions are obtained to evaluate the damage. The numerical result shows good agreement with the experimental result.
Book Synopsis Polymer Composites for Electrical Engineering by : Xingyi Huang
Download or read book Polymer Composites for Electrical Engineering written by Xingyi Huang and published by John Wiley & Sons. This book was released on 2021-11-01 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the diverse electrical engineering application of polymer composite materials with this in-depth collection edited by leaders in the field Polymer Composites for Electrical Engineering delivers a comprehensive exploration of the fundamental principles, state-of-the-art research, and future challenges of polymer composites. Written from the perspective of electrical engineering applications, like electrical and thermal energy storage, high temperature applications, fire retardance, power cables, electric stress control, and others, the book covers all major application branches of these widely used materials. Rather than focus on polymer composite materials themselves, the distinguished editors have chosen to collect contributions from industry leaders in the area of real and practical electrical engineering applications of polymer composites. The books relevance will only increase as advanced polymer composites receive more attention and interest in the area of advanced electronic devices and electric power equipment. Unique amongst its peers, Polymer Composites for Electrical Engineering offers readers a collection of practical and insightful materials that will be of great interest to both academic and industrial audiences. Those resources include: A comprehensive discussion of glass fiber reinforced polymer composites for power equipment, including GIS, bushing, transformers, and more) Explorations of polymer composites for capacitors, outdoor insulation, electric stress control, power cable insulation, electrical and thermal energy storage, and high temperature applications A treatment of semi-conductive polymer composites for power cables In-depth analysis of fire-retardant polymer composites for electrical engineering An examination of polymer composite conductors Perfect for postgraduate students and researchers working in the fields of electrical, electronic, and polymer engineering, Polymer Composites for Electrical Engineering will also earn a place in the libraries of those working in the areas of composite materials, energy science and technology, and nanotechnology.
Book Synopsis Electrical Resistance Based Damage Modeling of Multifunctional Carbon Fiber Reinforced Polymer Matrix Composites by : Robert James Hart
Download or read book Electrical Resistance Based Damage Modeling of Multifunctional Carbon Fiber Reinforced Polymer Matrix Composites written by Robert James Hart and published by . This book was released on 2017 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: However, for a specimen with large delamination extending beyond the electrode locations, the oblique resistance increased by 30%. This result suggests that for damage sensing applications, the spacing of electrodes relative to the size of the delamination is important. Finally CT image data was used to model 3-D void distributions and the electrical response of such specimens were compared to models with no voids. As the void content increased, the electrical resistance increased non-linearly. The relationship between void content and electrical resistance was attributed to a combination of three factors: (i) size and shape, (ii) orientation, and (iii) distribution of voids. As a whole, the current thesis provides a comprehensive framework for developing predictive, resistance-based damage sensing models for CFRP laminates of various layup and thickness.
Book Synopsis Damage Detection in Carbon Fiber Composites Using Electrical Resistance Measurements by : Ryan Steven Gory
Download or read book Damage Detection in Carbon Fiber Composites Using Electrical Resistance Measurements written by Ryan Steven Gory and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: This thesis proposes a methodology for structural health monitoring that incorporates the inherent multi-functionality of carbon fibers. The hypothesis of the thesis is that by monitoring the electrical resistance of composite panels it is possible to detect impacts and statistically model their effects on the remaining useful service life of structures. The proposed research investigates the application of statistics-based analysis to the measured electrical resistance signals during loading. The research also investigates the use of electrical resistance as a stress sensor by monitoring the resistance of test samples under tensile loading.
Book Synopsis Polymer Composites in the Aerospace Industry by : P. E. Irving
Download or read book Polymer Composites in the Aerospace Industry written by P. E. Irving and published by Woodhead Publishing. This book was released on 2019-11-26 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Composites in the Aerospace Industry, Second Edition, summarizes the latest research and developments on the design, manufacture and performance of composite components for aerospace structures. Sections cover the modeling, structure and behavior of 2D and 3D woven composites, the manufacture processes used for composite materials and components, buckling and compressive strength of laminates and manufacturing defects in composite materials, aspects of composite performance in aerospace structural design, including chapters on modeling stiffness and strength of structural elements, fatigue under uniaxial and multiaxial loads, fracture mechanics, impact strength and fatigue, crashworthiness, design and failure analysis of bolted joints, and much more. This updated edition is an essential reference resource for engineers, scientists and designers working in the development of composite materials in aerospace applications. Presents detailed discussions on the design, modeling and analysis of conventional and advanced polymer composites used in aerospace applications Provides an in-depth understanding of the performance parameters of aerospace composites, such as strength, stiffness and fatigue, impact and blast resistance Includes significant developments that have occurred since 2015 (in production and manufacturing, fatigue modeling, test standards, adhesive bonding and repair and service techniques) Features a brand new section on design applications, including helicopter components, fixed wing landing gear, aircraft wings and fuselage
Book Synopsis Tomographic Electrical Resistance-based Damage Sensing in Nano-Engineered Composite Structures by :
Download or read book Tomographic Electrical Resistance-based Damage Sensing in Nano-Engineered Composite Structures written by and published by . This book was released on 2010 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aligned carbon nanotubes (CNTs) are being investigated as a means for enhancing structural performance of composite structures. Inherent in introducing CNTs into existing polymer-matrix composites are new multifunctional attributes such as significantly enhanced electrical conductivity and piezoresistivity that may be used for damage sensing and inspection. Here, fiber-reinforced polymer-matrix laminates with aligned CNTs grown in-situ are coupled with a non-invasive sensing scheme utilizing the enhanced electrical conductivity of the laminates to infer damage based on resistance changes. The laminates contain long (~10 micron) aligned CNTs throughout the woven plies of the laminate, including at the ply interfaces. Electrodes are written onto the laminate surfaces using a direct-write process, and 3D damage inspection (in-plane and through-thickness) is demonstrated for impacted composite plates.
Book Synopsis Polymer Matrix Composites and Technology by : Ru-Min Wang
Download or read book Polymer Matrix Composites and Technology written by Ru-Min Wang and published by Elsevier. This book was released on 2011-07-14 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given such properties as low density and high strength, polymer matrix composites have become a widely used material in the aerospace and other industries. Polymer matrix composites and technology provides a helpful overview of these materials, their processing and performance.After an introductory chapter, part one reviews the main reinforcement and matrix materials used as well as the nature of the interface between them. Part two discusses forming and molding technologies for polymer matrix composites. The final part of the book covers key aspects of performance, including tensile, compression, shear and bending properties as well as impact, fatigue and creep behaviour.Polymer matrix composites and technology provides both students and those in industry with a valuable introduction to and overview of this important class of materials. Provides a helpful overview of these materials, their processing and performance incorporating naming and classification of composite materials Reviews the main reinforcement and matrix materials used as well as the nature of the interface between them including damage mechanisms Discusses forming and molding technologies for polymer matrix composites outlining various techniques and technologies
Book Synopsis Nondestructive Testing and Evaluation of Fiber-Reinforced Composite Structures by : Shuncong Zhong
Download or read book Nondestructive Testing and Evaluation of Fiber-Reinforced Composite Structures written by Shuncong Zhong and published by Springer Nature. This book was released on 2022-04-01 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a detailed description of the most common nondestructive testing(NDT) techniques used for the testing and evaluation fiber-reinforced composite structures, during manufacturing and/or in service stages. In order to facilitate the understanding and the utility of the different NDT techniques presented, the book first provides some information regarding the defects and material degradation mechanisms observed in fiber-reinforced composite structures as well as their general description and most probable causes. It is written based on the extensive scientific research and engineering backgrounds of the authors in the NDT and structural health monitoring (SHM) of structural systems from various areas including electrical, mechanical, materials, civil and biomedical engineering. Pursuing a rigorous approach, the book establishes a fundamental framework for the NDT of fiber-reinforced composite structures, while emphasizing on the importance of technique’s spatial resolution, integrated systems analysis and the significance of the influence stemming from the applicability of the NDT and the physical parameters of the test structures in the selection and utilization of adequate NDT techniques. The book is intended for students who are interested in the NDT of fiber-reinforced composite structures, researchers investigating the applicability of different NDT techniques to the inspections of structural systems, and NDT researchers and engineers working on the optimization of NDT systems for specific applications involving the use of fiber-reinforced composite structures.
Book Synopsis Advanced Composite Materials for Aerospace Engineering by : Sohel Rana
Download or read book Advanced Composite Materials for Aerospace Engineering written by Sohel Rana and published by Woodhead Publishing. This book was released on 2016-04-26 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Composite Materials for Aerospace Engineering: Processing, Properties and Applications predominately focuses on the use of advanced composite materials in aerospace engineering. It discusses both the basic and advanced requirements of these materials for various applications in the aerospace sector, and includes discussions on all the main types of commercial composites that are reviewed and compared to those of metals. Various aspects, including the type of fibre, matrix, structure, properties, modeling, and testing are considered, as well as mechanical and structural behavior, along with recent developments. There are several new types of composite materials that have huge potential for various applications in the aerospace sector, including nanocomposites, multiscale and auxetic composites, and self-sensing and self-healing composites, each of which is discussed in detail. The book’s main strength is its coverage of all aspects of the topics, including materials, design, processing, properties, modeling and applications for both existing commercial composites and those currently under research or development. Valuable case studies provide relevant examples of various product designs to enhance learning. Contains contributions from leading experts in the field Provides a comprehensive resource on the use of advanced composite materials in the aerospace industry Discusses both existing commercial composite materials and those currently under research or development
Book Synopsis In-situ Damage and Strain Monitoring of Large Polymer Composite Structures Using Carbon Nanotube Networks by : Ali Naghashpour
Download or read book In-situ Damage and Strain Monitoring of Large Polymer Composite Structures Using Carbon Nanotube Networks written by Ali Naghashpour and published by . This book was released on 2014 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, multiwalled carbon nanotubes (MWCNTs) have been introduced in fiber reinforced polymer composites (FRPC) to enhance their capabilities in terms of sensing and improving electrical properties. Even though there have been extensive studies on incorporating MWCNTs into polymer matrix composites to monitor their integrity, no work has been found to provide a technique to detect, locate and quantify damage in large polymer composite structure (LPCS) and also to investigate electrical resistance behavior of glass fiber/epoxy/MWCNT composites subjected to multi-directional deformation. The thesis is organized into two major sections: Developing two new structural health monitoring (SHM) techniques to detect, locate and quantify damages in LPCS, and investigating electrical resistance behavior of glass fiber/epoxy/MWCNT composites subjected to multi-directional deformation. In the first part of the thesis, two new, practical and real-time SHM techniques have been developed. One is for LPCS made of electrically non-conducive fibers and MWCNT networks. The other is for LPCS made of electrically conducive fibers and MWCNT networks. In these techniques, MWCNTs are added into epoxy matrix. This modified matrix is then incorporated with long fibers to make large composite plates. Two different strategies have been proposed for measuring electrical properties of LPCS depending on the type of fibers. The large plate is marked with grid points where electrically conductive silver paints are deposited. The electrical resistances and potentials between the grid points for electrically non-conductive fibers and conductive fibers reinforced polymer composite structures containing MWCNT are measured respectively. These values are used as reference sets. It has been shown that the occurrence of the damage makes the electrical properties between the contact points surrounding this damage change. The significant change in the electrical properties between contact points is used as an indication for detection, location and quantification of damage in the large plates. The SHM computer programs are written to provide the facility to detect, locate and quantify damage for the LPCSs in real-time. Two new concepts have been introduced for detecting, locating and quantifying damage in LPCSs using MWCNT networks. One is uniformity of MWCNT distribution. The other is sensitivity to change in electrical resistance. A new model of resistors network has been proposed for composite plates with different electrical conductivity as a result of different quantity of MWCNT. Theoretical analyses are performed based on Ohm’s and Kirchhoff’s laws using Matlab Simulink. Good agreement is found between experimental and simulation results. In the second part of the thesis, the behavior of electrical resistance for glass fiber/epoxy composite laminates containing MWCNT subjected to uniaxial stresses along different directions is investigated. An explanation is provided for the electrical resistance behavior of the laminates containing MWCNT subjected to multi-directional deformation.
Book Synopsis Impact Behaviour of Fibre-Reinforced Composite Materials and Structures by : S. R. Reid
Download or read book Impact Behaviour of Fibre-Reinforced Composite Materials and Structures written by S. R. Reid and published by Elsevier. This book was released on 2000-10-12 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study covers impact response, damage tolerance and failure of fibre-reinforced composite materials and structures. Materials development, analysis and prediction of structural behaviour and cost-effective design all have a bearing on the impact response of composites and this book brings together for the first time the most comprehensive and up-to-date research work from leading international experts. State of the art analysis of impact response, damage tolerance and failure of FRC materials Distinguished contributors provide expert analysis of the most recent materials and structures Valuable tool for R&D engineers, materials scientists and designers
Book Synopsis Structural Health Monitoring 2015 by : Fu-Kuo Chang
Download or read book Structural Health Monitoring 2015 written by Fu-Kuo Chang and published by DEStech Publications, Inc. This book was released on 2015-10-01 with total page 1644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Tenth International Workshop on Structural Health Monitoring, September 1–3, 2015. Selected research on the entire spectrum of structural health techniques and areas of applicationAvailable in print, complete online text download or individual articles. Series book comprising two volumes provides selected international research on the entire spectrum of structural health monitoring techniques used to diagnose and safeguard aircraft, vehicles, buildings, civil infrastructure, ships and railroads, as well as their components such as joints, bondlines, coatings and more. Includes special sections on system design, signal processing, multifunctional materials, sensor distribution, embedded sensors for monitoring composites, reliability and applicability in extreme environments. The extensive contents can be viewed below.
Book Synopsis Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering by : Kenneth Loh
Download or read book Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering written by Kenneth Loh and published by Woodhead Publishing. This book was released on 2016-02-03 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering focuses on nanotechnology, the innovation and control of materials at 100 nm or smaller length scales, and how they have revolutionized almost all of the various disciplines of science and engineering study. In particular, advances in synthesizing, imaging, and manipulating materials at the nano-scale have provided engineers with a broader array of materials and tools for creating high-performance devices. Nanomaterials possess drastically different properties than those of their bulk counterparts mainly because of their high surface-to-mass ratios and high surface energies/reactivity. For instance, carbon nanotubes have been shown to possess impressive mechanical strength, stiffness, and electrical conductivity superior to that of bulk carbon. Whilst nanotechnology has become deeply rooted in electrical, chemical, and materials engineering disciplines, its proliferation into civil engineering did not begin until fairly recently. This book covers that proliferation and the main challenges associated with the integration of nanomaterials and nano-scale design principles into civil and structural engineering. Examines nanotechnology and its application to not only structural engineering, but also transportation, new infrastructure materials, and the applications of nanotechnology to existing structural systems Focuses on how nanomaterials can provide enhanced sensing capabilities and mechanical reinforcement of the original structural material Analyzes experimental and computational work carried out by world-renowned researchers
