A Two Dimensional Piezoresistivity Model For Anisotropic Materials And Its Application In Self Sensing Of Carbon Fiber Reinforced Plastics

Author : Patrick Scholle
Publisher : Springer Nature
Page : 204 pages
File Size : 44,6 Mb
Release : 2023-03-02
Category : Technology & Engineering
ISBN : 9783031237669

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A Two-Dimensional Piezoresistivity Model for Anisotropic Materials and its Application in Self-Sensing of Carbon Fiber Reinforced Plastics by Patrick Scholle Pdf

This thesis works on the topic of fiber-reinforced plastics and discusses the measurement of strain with embedded sensors. Embedding sensors into a structure fundamentally poses challenges arising from the differences in mechanical properties of sensor and structure. This thesis works on the research area of Self-Sensing, where these challenges are overcome by using carbon fibers for both load-carrying and strain-sensing functions. Starting with a literature review, this thesis proposes three research hypotheses, which are targeted to describe the Self-Sensing properties of unidirectional carbon fiber reinforced plastics (CFRPs) for strain measurements. These hypotheses assume, that the electric anisotropy of the material results in a complex voltage distribution within a Self-Sensing specimen. In order to discuss this point further, a two-dimensional piezoresistivity model based on the Laplace equation is introduced. The developed model newly allows to quantify the electric potential changes in specimens with arbitrary geometrical dimensions and electric anisotropy. Furthermore, this thesis discusses a set of experimental results on the piezoresistive properties of unidirectional CFRP made with the pultrusion process. Overall, the results of the experiments indicate that the most repeatable results are obtained for specimens with electric contacts at their cut-end. This approach allows to manufacture Self-Strain-Sensing rods with a gauge factor of approximately 1.9 that can be used in a multifunctional manner for both load-carrying and strain-sensing purposes. Furthermore, a novel measurement setup is developed, which allows to acquire the electric potential distribution on the surface of electrical conductors with very high spacial resolution. This experimental setup newly reveals that the current flow in specimens can be more complex than assumed in a two-dimensional model.

Author : It Meng Low,Yu Dong
Publisher : Elsevier
Page : 690 pages
File Size : 43,5 Mb
Release : 2021-06-18
Category : Technology & Engineering
ISBN : 9780128208793

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Composite Materials by It Meng Low,Yu Dong Pdf

Composite materials have been well developed to meet the challenges of high-performing material properties targeting engineering and structural applications. The ability of composite materials to absorb stresses and dissipate strain energy is vastly superior to that of other materials such as polymers and ceramics, and thus they offer engineers many mechanical, thermal, chemical and damage-tolerance advantages with limited drawbacks such as brittleness. Composite Materials: Manufacturing, Properties and Applications presents a comprehensive review of current status and future directions, latest technologies and innovative work, challenges and opportunities for composite materials. The chapters present latest advances and comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites. The book targets researchers in the field of advanced composite materials and ceramics, students of materials science and engineering at the postgraduate level, as well as material engineers and scientists working in industrial R& D sectors for composite material manufacturing. Comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites Features latest advances in terms of mechanical properties and other material parameters which are essential for designers and engineers in the composite and composite reinforcement manufacturing industry, as well as all those with an academic research interest in the subject Offers a good platform for end users to refer to the latest technologies and topics fitting into specific applications and specific methods to tackle manufacturing or material processing issues in relation to different types of composite materials

Author : Frank Gardea
Publisher : Springer Nature
Page : 105 pages
File Size : 55,7 Mb
Release : 2024-06-29
Category : Electronic
ISBN : 9783031504785

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Mechanics of Composite, Hybrid and Multifunctional Materials, Volume 5 by Frank Gardea Pdf

Author : Anonim
Publisher : Unknown
Page : 974 pages
File Size : 53,5 Mb
Release : 1999
Category : Aeronautics
ISBN : STANFORD:36105021811372

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International Aerospace Abstracts by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 772 pages
File Size : 42,8 Mb
Release : 2004
Category : Dissertations, Academic
ISBN : UOM:39015057953336

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Dissertation Abstracts International by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 2566 pages
File Size : 44,5 Mb
Release : 2002
Category : Chemistry
ISBN : UOM:39015057324520

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Chemical Abstracts by Anonim Pdf

Author : Johannes Michael Sinapius
Publisher : Springer Nature
Page : 472 pages
File Size : 40,7 Mb
Release : 2020-08-24
Category : Technology & Engineering
ISBN : 9783662613993

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Adaptronics – Smart Structures and Materials by Johannes Michael Sinapius Pdf

Since the 1980s, scientists have been researching adaptive structures for materials, for multifunctional elements or even for complete systems. Adaptronics (smart materials, smart structures, smart systems) is a field of distinct interdisciplinarity. The book therefore offers an interdisciplinary view of adaptronic systems, materials and functional elements and their applications. The subject matter integrates various engineering disciplines, from electrical engineering and information technology to manufacturing and control engineering, materials engineering and structural mechanics - to name but a few of the relevant subject areas. Starting from the basic principles and variants of adaptronic systems and functional materials, the textbook explains the different construction methods of functional elements. Building on this, readers learn how to apply this knowledge to active shape control, active vibration control and active vibroacoustics. For each of these topics the author presents current examples from research, discusses research results and future research questions. Each of the nine chapters closes with references to further literature. An index of the mathematical symbols used and a keyword index facilitate learning for readers.The book is aimed at Master's students in engineering courses such as mechanical engineering, aerospace engineering, mechatronics, automotive engineering and related courses. The book provides a comprehensive overview for industrial practitioners who want to familiarize themselves with the field of adaptronics and also serves as a reliable reference book.

Author : Roham Rafiee
Publisher : Elsevier
Page : 586 pages
File Size : 54,8 Mb
Release : 2017-10-06
Category : Science
ISBN : 9780323482226

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Carbon Nanotube-Reinforced Polymers by Roham Rafiee Pdf

Carbon Nanotube-Reinforced Polymers: From Nanoscale to Macroscale addresses the advances in nanotechnology that have led to the development of a new class of composite materials known as CNT-reinforced polymers. The low density and high aspect ratio, together with their exceptional mechanical, electrical and thermal properties, render carbon nanotubes as a good reinforcing agent for composites. In addition, these simulation and modeling techniques play a significant role in characterizing their properties and understanding their mechanical behavior, and are thus discussed and demonstrated in this comprehensive book that presents the state-of-the-art research in the field of modeling, characterization and processing. The book separates the theoretical studies on the mechanical properties of CNTs and their composites into atomistic modeling and continuum mechanics-based approaches, including both analytical and numerical ones, along with multi-scale modeling techniques. Different efforts have been done in this field to address the mechanical behavior of isolated CNTs and their composites by numerous researchers, signaling that this area of study is ongoing. Explains modeling approaches to carbon nanotubes, together with their application, strengths and limitations Outlines the properties of different carbon nanotube-based composites, exploring how they are used in the mechanical and structural components Analyzes the behavior of carbon nanotube-based composites in different conditions

Author : Fu-Kuo Chang ,Fotis Kopsaftopoulos
Publisher : DEStech Publications, Inc
Page : 1644 pages
File Size : 45,5 Mb
Release : 2015-10-01
Category : Technology & Engineering
ISBN : 9781605952758

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Structural Health Monitoring 2015 by Fu-Kuo Chang ,Fotis Kopsaftopoulos Pdf

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.

Author : Chyanbin Hwu
Publisher : Springer
Page : 0 pages
File Size : 44,7 Mb
Release : 2021-04-28
Category : Science
ISBN : 3030666751

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Anisotropic Elasticity with Matlab by Chyanbin Hwu Pdf

This book provides the theory of anisotropic elasticity with the computer program for analytical solutions as well as boundary element methods. It covers the elastic analysis of two-dimensional, plate bending, coupled stretching-bending, and three-dimensional deformations, and is extended to the piezoelectric, piezomagnetic, magnetic-electro-elastic, viscoelastic materials, and the ones under thermal environment. The analytical solutions include the solutions for infinite space, half-space, bi-materials, wedges, interface corners, holes, cracks, inclusions, and contact problems. The boundary element solutions include BEMs for two-dimensional anisotropic elastic, piezoelectric, magnetic-electro-elastic, viscoelastic analyses, and their associated dynamic analyses, as well as coupled stretching-bending analysis, contact analysis, and three-dimensional analysis. This book also provides source codes and examples for all the presenting analytical solutions and boundary element methods. The program is named as AEPH (Anisotropic Elastic Plates – Hwu), which contains 204 MATLAB functions.

Author : Felix Ryler
Publisher : Unknown
Page : 368 pages
File Size : 49,8 Mb
Release : 2016-10-01
Category : Electronic
ISBN : 168117667X

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Carbon Nanotubes by Felix Ryler Pdf

Polymer nanocomposites are a class of material with a great deal of promise for potential applications in various industries ranging from construction to aerospace. These are high performance materials that exhibit unusual property combinations and unique design possibilities and are thought of as the materials of the 21st century. With an estimated annual growth rate of about 25% and huge demand for engineering polymers, their potential is so promising that they are useful in several applications ranging from packaging to bio-medical. The main difference between polymeric nanocomposites and conventional composites is the filler that is being used for reinforcement. In the nanocomposites the reinforcement is on the order of nanometer that leads to a very different final macroscopic property. Due to this unique feature polymeric nanocomposites have been studied exclusively in the last decade using various nanofillers such as minerals, sheets or fibers. A carbon nanotube (CNT) is a miniature cylindrical carbon structure that has hexagonal graphite molecules attached at the edges. Nanotubes look like a powder or black soot, but they're actually rolled-up sheets of graphene that form hollow strands with walls that are only one atom thick. Nanotubes, which are sometimes called buckytubes, were developed from the Fullerene, a structure that is similar to the geodesic domes. They take the form of cylindrical carbon molecules and have novel properties that make them potentially useful in a wide variety of applications in nanotechnology, electronics, optics and other fields of materials science. They exhibit extraordinary strength and unique electrical properties, and are efficient conductors of heat. Nanotubes are members of the fullerene structural family, which also includes buckyballs. Whereas buckyballs are spherical in shape, a nanotube is cylindrical, with at least one end typically capped with a hemisphere of the buckyball structure. Carbon Nanotubes - Polymer Nanocomposites focuses on the preparation and property analysis of polymer nanocomposites with CNTs (fibers) as nano fillers.

Author : Low, I. M.
Publisher : IGI Global
Page : 679 pages
File Size : 55,9 Mb
Release : 2013-05-31
Category : Technology & Engineering
ISBN : 9781466640672

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MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments by Low, I. M. Pdf

Ceramics are a versatile material, more so than is widely known. They are thermal resistant, poor electrical conductors, insulators against nuclear radiation, and not easily damaged, making ceramics a key component in many industrial processes. MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments investigates a new class of ultra-durable ceramic materials, which exhibit characteristics of both ceramics and metals. Readers will explore recent advances in the manufacturing of ceramic materials that improve their durability and other physical properties, enhancing their overall usability and cost-effectiveness. This book will be of primary use to researchers, academics, and practitioners in chemical, mechanical, and electrical engineering. This book is part of the Research Essentials collection.

Author : Arnon Bentur,Sidney Mindess
Publisher : CRC Press
Page : 624 pages
File Size : 48,9 Mb
Release : 2006-11-16
Category : Technology & Engineering
ISBN : 9781482267747

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Fibre Reinforced Cementitious Composites by Arnon Bentur,Sidney Mindess Pdf

Advanced cementitious composites can be designed to have outstanding combinations of strength (five to ten times that of conventional concrete) and energy absorption capacity (up to 1000 times that of plain concrete). This second edition brings together in one volume the latest research developments in this rapidly expanding area. The book is split

Author : Jinsong Leng,Alan Kin-tak Lau
Publisher : CRC Press
Page : 462 pages
File Size : 55,9 Mb
Release : 2010-12-21
Category : Technology & Engineering
ISBN : 9781439816837

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Multifunctional Polymer Nanocomposites by Jinsong Leng,Alan Kin-tak Lau Pdf

The novel properties of multifunctional polymer nanocomposites make them useful for a broad range of applications in fields as diverse as space exploration, bioengineering, car manufacturing, and organic solar cell development, just to name a few. Presenting an overview of polymer nanocomposites, how they compare with traditional composites, and th

Author : Robert E. Newnham
Publisher : Oxford University Press on Demand
Page : 391 pages
File Size : 48,9 Mb
Release : 2005
Category : Science
ISBN : 9780198520757

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Properties of Materials by Robert E. Newnham Pdf

Tensors, matrices, symmetry, and structure-property relationships form the main subjects of the book. While tensors and matrices provide the mathematical framework for understanding anistropy, on which the physical and chemical properties of crystals and textured materials often depend, atomistic arguments are also needed to qualify the property coefficients in various directions. The atomistic arguments are partly based on symmetry and party on the basic physics and chemistry of materials.