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Dielectric Elastomers As Electromechanical Transducers

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Dielectric Elastomers as Electromechanical Transducers

Dielectric Elastomers as Electromechanical Transducers Book
Author : Federico Carpi,Danilo De Rossi,Roy Kornbluh,Ronald Edward Pelrine,Peter Sommer-Larsen
Publisher : Elsevier
Release : 2011-09-06
ISBN : 9780080557724
Language : En, Es, Fr & De

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Book Description :

Dielectric Elastomers as Electromechanical Transducers provides a comprehensive and updated insight into dielectric elastomers; one of the most promising classes of polymer-based smart materials and technologies. This technology can be used in a very broad range of applications, from robotics and automation to the biomedical field. The need for improved transducer performance has resulted in considerable efforts towards the development of devices relying on materials with intrinsic transduction properties. These materials, often termed as “smart or “intelligent , include improved piezoelectrics and magnetostrictive or shape-memory materials. Emerging electromechanical transduction technologies, based on so-called ElectroActive Polymers (EAP), have gained considerable attention. EAP offer the potential for performance exceeding other smart materials, while retaining the cost and versatility inherent to polymer materials. Within the EAP family, “dielectric elastomers , are of particular interest as they show good overall performance, simplicity of structure and robustness. Dielectric elastomer transducers are rapidly emerging as high-performance “pseudo-muscular actuators, useful for different kinds of tasks. Further, in addition to actuation, dielectric elastomers have also been shown to offer unique possibilities for improved generator and sensing devices. Dielectric elastomer transduction is enabling an enormous range of new applications that were precluded to any other EAP or smart-material technology until recently. This book provides a comprehensive and updated insight into dielectric elastomer transduction, covering all its fundamental aspects. The book deals with transduction principles, basic materials properties, design of efficient device architectures, material and device modelling, along with applications. Concise and comprehensive treatment for practitioners and academics Guides the reader through the latest developments in electroactive-polymer-based technology Designed for ease of use with sections on fundamentals, materials, devices, models and applications

Electromechanical Coupling Behavior of Dielectric Elastomer Transducers

Electromechanical Coupling Behavior of Dielectric Elastomer Transducers Book
Author : Jianyou Zhou
Publisher : Unknown
Release : 2015
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Dielectric elastomer transducers with large deformation, high energy output, light weight and low cost have been drawing great interest from both the research and industry communities, and shown potential for versatile applications in biomimetics, dynamics, robotics and energy harvesting. However, in addition to multiple failure modes such as electrical breakdown, electromechanical instability, loss-of- tension and fatigue, the performance of dielectric elastomer transducers are also strongly influenced by the hyperelastic and viscoelastic properties of the material. Also, the interplay among these material properties and the failure modes is rather difficult to predict. Therefore, in order to provide guidelines for the optimal design of dielectric elastomer transducers, it is essential to first develop accurate and reliable models, and efficient numerical methods to investigate their performance. First, this thesis purposes a boundary- constraint method to eliminate the electromechanical instability of dielectric elastomer actuators under voltage-control loading condition and improve their actuation deformation. Second, based on the finite-deformation viscoelasticity model, the natural frequency tuning process of viscoelastic dielectric elastomer resonators is examined in this work. It is found that the tuned natural frequency is highly affected by the material viscoelasticity. Also, it is concluded that the electrical loading rate only influences the tunable frequency range and the safe operation voltage of the resonator, but not the tuned natural frequency when the applied voltage is within the safe range. Third, with the finite-deformation viscoelasticity model, the energy conversion efficiency of dielectric elastomer generators under equi-biaxial loading is also investigated in this work. Simulation results show that increasing the maximum stretch ratio and the rate of defor mation, and choosing a proper bias voltage can lead to an improvement of the energy conversion efficiency. Furthermore, the fatigue life of dielectric elastomer devices under cyclic loading is explored in this work for the first time . Simulation results have demonstrated that the energy conversion efficiency of dielectric elastomer generators is compromised by their fatigue life. To tackle the critical challenges for the development and design of dielectric elastomers transducers, this research develops theoretical models and numerical methods that are able to capture the nonlinear electromechanical coupling, the material properties, the typical failure modes and different operating conditions of dielectric elastomer transducers. With more accurate and reliable modeling methods, this work is expected to provide a comprehensive understanding on the fundamentals and technologies of dielectric elastomer transducers and trigger more innovative and optimal design of such devices.

Electromechanical Coupling Behavior of Dielectric Elastomer Composites

Electromechanical Coupling Behavior of Dielectric Elastomer Composites Book
Author : Ryan Steven Scurlock
Publisher : Unknown
Release : 2016
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Dielectric elastomers have gained substantial interest in the past few decades under research efforts aimed to improve electromechanical transducer technology. This material is often termed a “smart material” due to its intrinsic transduction properties, allowing the elastomer to deform in response to electric stimulation. High mechanical compliance, lightweight, low cost, and the ability to achieve enormous voltage induced strains make dielectric elastomers excellent candidates to serve as electromechanical transducers, both as high efficiency actuators and energy harvesters. This work is focused on increasing the transduction efficiency of dielectric elastomers, strengthening their potential effectiveness as a transducer. To enhance the electrostriction of the material, a composite concept is introduced where rigid conducting fibrous electrodes are embedded into the dielectric. A combined theoretical and numerical modeling framework is developed to analyze the electromechanical behavior of several different composite arrangements. In order to examine the large mechanical deformations of the elastomer, a finite deformation theory is required for the description of the material behavior. To describe the material free energy, a compressible Neo-Hookean model is utilized. The finite element method is used for the numerical solution technique to the boundary value problem.

Electroactivity in Polymeric Materials

Electroactivity in Polymeric Materials Book
Author : Lenore Rasmussen
Publisher : Springer Science & Business Media
Release : 2012-03-02
ISBN : 1461408784
Language : En, Es, Fr & De

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Book Description :

Electroactivity in Polymeric Materials provides an in-depth view of the theory of electroactivity and explores exactly how and why various electroactive phenomena occur. The book explains the theory behind electroactive bending (including ion-polymer-metal-composites –IPMCs), dielectric elastomers, electroactive contraction, and electroactive contraction-expansion cycles. The book also balances theory with applications – how electroactivity can be used – drawing inspiration from the manmade mechanical world and the natural world around us.

Advances in Energy Harvesting Methods

Advances in Energy Harvesting Methods Book
Author : Niell Elvin,Alper Erturk
Publisher : Springer Science & Business Media
Release : 2013-02-15
ISBN : 146145705X
Language : En, Es, Fr & De

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Book Description :

Advances in Energy Harvesting Methods presents a state-of-the-art understanding of diverse aspects of energy harvesting with a focus on: broadband energy conversion, new concepts in electronic circuits, and novel materials. This book covers recent advances in energy harvesting using different transduction mechanisms; these include methods of performance enhancement using nonlinear effects, non-harmonic forms of excitation and non-resonant energy harvesting, fluidic energy harvesting, and advances in both low-power electronics as well as material science. The contributors include a brief literature review of prior research with each chapter for further reference.

Living machines

Living machines Book
Author : Tony J. Prescott,Nathan Lepora,Paul F. M. J Verschure
Publisher : Oxford University Press
Release : 2018-04-19
ISBN : 0191666815
Language : En, Es, Fr & De

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Book Description :

Contemporary research in the field of robotics attempts to harness the versatility and sustainability of living organisms. By exploiting those natural principles, scientists hope to render a renewable, adaptable, and robust class of technology that can facilitate self-repairing, social, and moral—even conscious—machines. This is the realm of robotics that scientists call "the living machine". Living Machines can be divided into two entities-biomimetic systems, those that harness the principles discovered in nature and embody them in new artifacts, and biohybrid systems, which couple biological entities with synthetic ones. Living Machines: A handbook of research in biomimetic and biohybrid systems surveys this flourishing area of research. It captures the current state of play and points to the opportunities ahead, addressing such fields as self-organization and co-operativity, biologically-inspired active materials, self-assembly and self-repair, learning, memory, control architectures and self-regulation, locomotion in air, on land or in water, perception, cognition, control, and communication. In all of these areas, the potential of biomimetics is shown through the construction of a wide range of different biomimetic devices and animal-like robots. Biohybrid systems is a relatively new field, with exciting and largely unknown potential, but one that is likely to shape the future of humanity. Chapters outline current research in areas including brain-machine interfaces-where neurons are connected to microscopic sensors and actuators-and various forms of intelligent prostheses from sensory devices like artificial retinas, to life-like artificial limbs, brain implants, and virtual reality-based rehabilitation approaches. The handbook concludes by exploring the impact living machine technology will have on both society and the individual, by forcing human beings to question how we see and understand ourselves. With contributions from leading researchers drawing on ideas from science, engineering, and the humanities, this handbook will appeal to both undergraduate and postgraduate students of biomimetic and biohybrid technologies. Researchers in the areas of computational modeling and engineering, including artificial intelligence, machine learning, artificial life, biorobotics, neurorobotics, and human-machine interfaces, will find Living Machines an invaluable resource.

Advanced Piezoelectric Materials

Advanced Piezoelectric Materials Book
Author : Kenji Uchino
Publisher : Woodhead Publishing
Release : 2017-06-20
ISBN : 0081012551
Language : En, Es, Fr & De

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Book Description :

Advanced Piezoelectric Materials: Science and Technology, Second Edition, provides revised, expanded, and updated content suitable for those researching piezoelectric materials or using them to develop new devices in areas such as microelectronics, optical, sound, structural, and biomedical engineering. Three new chapters cover multilayer technologies with base-metal internal electrodes, templated grain growth preparation techniques for manufacturing piezoelectric single crystals, and piezoelectric MEMS technologies. Chapters from the first edition have been revised in order to provide up-to-date, comprehensive coverage of developments in the field. Part One covers the structure and properties of a range of piezoelectric materials. Part Two details advanced manufacturing processes for particular materials and device types, including three new chapters. Finally, Part Three covers materials development for three key applications of piezoelectric materials. Dr. Kenji Uchino is a pioneer in piezoelectric actuators, Professor of Electrical Engineering at Penn State University, and Director of the International Center for Actuators and Transducers. He has authored 550 papers, 54 books and 26 patents in the ceramic actuator area. Features an overview of manufacturing methods for a wide range of piezoelectric materials Provides revised, expanded, and updated coverage compared to the first edition, including three new chapters Suitable for those researching piezoelectric materials or using them to develop new devices in areas such as microelectronics, optical, sound, structural, and biomedical engineering

Petroleum Engineering Explained

Petroleum Engineering Explained Book
Author : David Shallcross
Publisher : Royal Society of Chemistry
Release : 2020-04-20
ISBN : 1788016688
Language : En, Es, Fr & De

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Book Description :

Assuming no mathematical or chemistry knowledge, this book introduces complete beginners to the field of petroleum engineering. Written in a straightforward style, the author takes a practical approach to the subject avoiding complex mathematics to achieve a text that is robust without being intimidating. Covering traditional petroleum engineering topics, readers of this book will learn about the formation and characteristics of petroleum reservoirs, the chemical properties of petroleum, the processes involved in the exploitation of reservoirs, post-extraction processing, industrial safety, and the long-term outlook for the oil and gas production. The descriptions and discussions are informed by considering the production histories of several fields including the Ekofisk field in the North Sea, the Wyburn Field in Canada, the Manifa Field in Saudi Arabia and the Wilmington Field off the Californian Coast. The factors leading up to the well blowouts on board the Deepwater Horizon in the Gulf of Mexico and in the Mantara Field in the Timor Sea are also examined. With a glossary to explain key words and concepts, this book is a perfect introduction for newcomers to a petroleum engineering course, as well as non-specialists in industry. Professor David Shallcross is one of the foremost practitioners in chemical engineering education worldwide. Readers of this book will find his previous book, Chemical Engineering Explained, a useful companion.

Fundamentals of Smart Materials

Fundamentals of Smart Materials Book
Author : Mohsen Shahinpoor
Publisher : Royal Society of Chemistry
Release : 2020-04-22
ISBN : 178262645X
Language : En, Es, Fr & De

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Book Description :

Smart materials are of significant interest and this is the first textbook to provide a comprehensive graduate level view of topics that relate to this field. Fundamentals of Smart Materials consists of a workbook and solutions manual covering the basics of different functional material systems aimed at advanced undergraduate and postgraduate students. Topics include piezoelectric materials, magnetostrictive materials, shape memory alloys, mechanochromic materials, thermochromic materials, chemomechanical polymers and self-healing materials. Each chapter provides an introduction to the material, its applications and uses with example problems, fabrication and manufacturing techniques, conclusions, homework problems and a bibliography. Edited by a leading researcher in smart materials, the textbook can be adopted by teachers in materials science and engineering, chemistry, physics and chemical engineering.

Nanoscience and Nanotechnology

Nanoscience and Nanotechnology Book
Author : Marcel Van de Voorde
Publisher : Walter de Gruyter GmbH & Co KG
Release : 2018-06-11
ISBN : 3110547295
Language : En, Es, Fr & De

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Book Description :

Innovations in Nanoscience and Nanotechnology summarizes the state of the art in nano-sized materials. The authors focus on innovation aspects and highlight potentials for future developments and applications in health care, including pharmaceutics, dentistry, and cosmetics; information and communications; energy; and chemical engineering. The chapters are written by leading researchers in nanoscience, chemistry, pharmacy, biology, chemistry, physics, engineering, medicine, and social science. The authors come from a range of backgrounds including academia, industry, and national and international laboratories around the world. This book is ideally suited for researchers and students in chemistry, physics, biology, engineering, materials science, and medicine and is a useful guide for industrialists. It aims to provide inspiration for scientists, new ideas for developers and innovators in industry, and guidelines for toxicologists. It also provides guidelines for agencies and government authorities to establish safe working conditions.

Flexible and Stretchable Electronic Composites

Flexible and Stretchable Electronic Composites Book
Author : Deepalekshmi Ponnamma,Kishor Kumar Sadasivuni,Chaoying Wan,Sabu Thomas,Mariam Al-Ali AlMa'adeed
Publisher : Springer
Release : 2015-10-16
ISBN : 3319236636
Language : En, Es, Fr & De

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Book Description :

This book is the first comprehensive collection of electronic aspects of different kinds of elastomer composites, including combinations of synthetic, natural and thermoplastic elastomers with different conducting fillers like metal nanoparticles, carbon nanotubes, or graphenes, and many more. It covers elastomer composites, which are useful in electronic applications, including chemical and physical as well as material science aspects. The presented elastomer composites have great potential for solving emerging new material application requirements, for example as flexible and wearable electronics. The book is structured and organized by the rubber/elastomer type: each chapter describes a different elastomer matrix and its composites. While introducing to important fundamentals, it is application-oriented, discussing the current issues and challenges in the field of elastomer composites. This book will thus appeal to researchers and scientists, to engineers and technologists, but also to graduate students, working on elastomer composites, or on electronics engineering with the composites, providing the readers with a sound introduction to the field and solutions to both fundamental and applied problems.

Thermoplastic Elastomers

Thermoplastic Elastomers Book
Author : Adel El-Sonbati
Publisher : BoD – Books on Demand
Release : 2012-03-28
ISBN : 9535103466
Language : En, Es, Fr & De

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Book Description :

Thermoplastics can be used for various applications, which range from household articles to the aeronautic sector. This book, "Thermoplastic Elastomers", is comprised of nineteen chapters, written by specialized scientists dealing with physical and/or chemical modifications of thermoplastics and thermoplastic starch. Such studies will provide a great benefit to specialists in food, electric, telecommunication devices, and plastic industries. Each chapter provides a comprehensive introduction to a specific topic, with a survey of developments to date.

Handbook Of Biomimetics And Bioinspiration Biologically driven Engineering Of Materials Processes Devices And Systems In 3 Volumes

Handbook Of Biomimetics And Bioinspiration  Biologically driven Engineering Of Materials  Processes  Devices  And Systems  In 3 Volumes  Book
Author : Jabbari Esmaiel,Lee Luke P,Ghaemmaghami Amir
Publisher : World Scientific
Release : 2014-04-29
ISBN : 9814520276
Language : En, Es, Fr & De

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Book Description :

Global warming, pollution, food and water shortage, cyberspace insecurity, over-population, land erosion, and an overburdened health care system are major issues facing the human race and our planet. These challenges have presented a mandate to develop “natural” or “green” technologies using nature and the living system as a guide to rationally design processes, devices, and systems. This approach has given rise to a new paradigm, one in which innovation goes hand-in-hand with less waste, less pollution, and less invasiveness to life on earth. Bioinspiration has also led to the development of technologies that mimic the hierarchical complexity of biological systems, leading to novel highly efficient, more reliable multifunctional materials, devices, and systems that can perform multiple tasks at one time. This multi-volume handbook focuses on the application of biomimetics and bioinspiration in medicine and engineering to produce miniaturized multi-functional materials, devices, and systems to perform complex tasks. Our understanding of complex biological systems at different length scales has increased dramatically as our ability to observe nature has expanded from macro to molecular scale, leading to the rational biologically-driven design to find solution to technological problems in medicine and engineering.The following three-volume set covers the fields of bioinspired materials, electromechanical systems developed from concepts inspired by nature, and tissue models respectively.The first volume focuses on the rational design of nano- and micro-structured hierarchical materials inspired by the relevant characteristics in living systems, such as the self-cleaning ability of lotus leaves and cicadas' wings; the superior walking ability of water striders; the anti-fogging function of mosquitoes' eyes; the water-collecting ability of Namib Desert Beetles and spider silk; the high adhesivity of geckos' feet and rose petals; the high adhesivity of mussels in wet aquatic environments; the anisotropic wetting of butterflies' wings; the anti-reflection capabilities of cicadas' wings; the self-cleaning functionality of fish scales; shape anisotropy of intracellular particles; the dielectric properties of muscles; the light spectral characteristics of plant leaves; the regeneration and self-healing ability of earthworms; the self-repairing ability of lotus leaves; the broadband reflectivity of moths' eyes; the multivalent binding, self-assembly and responsiveness of cellular systems; the biomineral formation in bacteria, plants, invertebrates, and vertebrates; the multi-layer structure of skin; the organization of tissue fibers; DNA structures with metal-mediated artificial base pairs; and the anisotropic microstructure of jellyfish mesogloea. In this volume, sensor and microfluidic technologies combined with surface patterning are explored for the diagnosis and monitoring of diseases. The high throughput combinatorial testing of biomaterials in regenerative medicine is also covered.The second volume presents nature-oriented studies and developments in the field of electromechanical devices and systems. These include actuators and robots based on the movement of muscles, algal antenna and photoreception; the non-imaging light sensing system of sea stars; the optical system of insect ocellus; smart nanochannels and pumps in cell membranes; neuromuscular and sensory devices that mimic the architecture of peripheral nervous system; olfaction-based odor sensing; cilia-mimetic microfluidic systems; the infrared sensory system of pyrophilous insects; ecologically inspired multizone temperature control systems; cochlea and surface acoustic wave resonators; crickets' cercal system and flow sensing abilities; locusts' wings and flapping micro air vehicles; the visual motion sensing of flying insects; hearing aid devices based on the human cochlea; the geometric perception of tortoises and pigeons; the organic matter sensing capability of cats and dogs; and the silent flight of rats. The third volume features engineered models of biological tissues. These include engineered matrices to mimic cancer stem cell niches; in vitro models for bone regeneration; models of muscle tissue that enable the study of cardiac infarction and myopathy; 3D models for the differentiation of embryonic stem cells; bioreactors for in vitro cultivation of mammalian cells; human lung, liver and heart tissue models; topographically-defined cell culture models; ECM mimetic tissue printing; biomimetic constructs for regeneration of soft tissues; and engineered constructs for the regeneration of musculoskeletal and corneal tissue.This three-volume set is a must-have for anyone keen to understand the complexity of biological systems and how that complexity can be mimicked to engineer novel materials, devices and systems to solve pressing technological challenges of the twenty-first century.Key Features:The only handbook that covers all aspects of biomimetics and bioinspiration, including materials, mechanics, signaling and informaticsContains 248 colored figures

Flexible Energy Conversion and Storage Devices

Flexible Energy Conversion and Storage Devices Book
Author : Chunyi Zhi,Liming Dai
Publisher : John Wiley & Sons
Release : 2018-06-27
ISBN : 3527342605
Language : En, Es, Fr & De

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Book Description :

Provides in-depth knowledge of flexible energy conversion and storage devices-covering aspects from materials to technologies Written by leading experts on various critical issues in this emerging field, this book reviews the recent progresses on flexible energy conversion and storage devices, such as batteries, supercapacitors, solar cells, and fuel cells. It introduces not only the basic principles and strategies to make a device flexible, but also the applicable materials and technologies, such as polymers, carbon materials, nanotechnologies and textile technologies. It also discusses the perspectives for different devices. Flexible Energy Conversion and Storage Devices contains chapters, which are all written by top researchers who have been actively working in the field to deliver recent advances in areas from materials syntheses, through fundamental principles, to device applications. It covers flexible all-solid state supercapacitors; fiber/yarn based flexible supercapacitors; flexible lithium and sodium ion batteries; flexible diversified and zinc ion batteries; flexible Mg, alkaline, silver-zinc, and lithium sulfur batteries; flexible fuel cells; flexible nanodielectric materials with high permittivity for power energy storage; flexible dye sensitized solar cells; flexible perovskite solar cells; flexible organic solar cells; flexible quantum dot-sensitized solar cells; flexible triboelectric nanogenerators; flexible thermoelectric devices; and flexible electrodes for water-splitting. -Covers the timely and innovative field of flexible devices which are regarded as the next generation of electronic devices -Provides a highly application-oriented approach that covers various flexible devices used for energy conversion and storage -Fosters an understanding of the scientific basis of flexible energy devices, and extends this knowledge to the development, construction, and application of functional energy systems -Stimulates and advances the research and development of this intriguing field Flexible Energy Conversion and Storage Devices is an excellent book for scientists, electrochemists, solid state chemists, solid state physicists, polymer chemists, and electronics engineers.

Advances in Elastomers I

Advances in Elastomers I Book
Author : P. M. Visakh,Sabu Thomas,Arup K. Chandra,Aji. P. Mathew
Publisher : Springer Science & Business Media
Release : 2013-03-29
ISBN : 3642209254
Language : En, Es, Fr & De

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Book Description :

This is the first volume of a two-volume work which summarizes in an edited format and in a fairly comprehensive manner many of the recent technical research accomplishments in the area of Elastomers. “Advances in Elastomers” discusses the various attempts reported on solving these problems from the point of view of the chemistry and the structure of elastomers, highlighting the drawbacks and advantages of each method. It summarize the importance of elastomers and their multiphase systems in human life and industry, and covers all the topics related to recent advances in elastomers, their blends, IPNs, composites and nanocomposites. This first volume focuses on advances on the blends and interpenetrating networks (IPNs) of elastomers.

Soft Nanocomposites with Enhanced Electromechanical Response for Dielectric Elastomer Actuators

Soft Nanocomposites with Enhanced Electromechanical Response for Dielectric Elastomer Actuators Book
Author : Hristiyan Stoyanov
Publisher : Unknown
Release : 2010
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Electromechanical transducers based on elastomer capacitors are presently considered for many soft actuation applications, due to their large reversible deformation in response to electric field induced electrostatic pressure. The high operating voltage of such devices is currently a large drawback, hindering their use in applications such as biomedical devices and biomimetic robots, however, they could be improved with a careful design of their material properties. The main targets for improving their properties are increasing the relative permittivity of the active material, while maintaining high electric breakdown strength and low stiffness, which would lead to enhanced electrostatic storage ability and hence, reduced operating voltage. Improvement of the functional properties is possible through the use of nanocomposites. These exploit the high surface-to-volume ratio of the nanoscale filler, resulting in large effects on macroscale properties. This thesis explores several strategies for nanomaterials design. The resulting nanocomposites are fully characterized with respect to their electrical and mechanical properties, by use of dielectric spectroscopy, tensile mechanical analysis, and electric breakdown tests. First, nanocomposites consisting of high permittivity rutile TiO2 nanoparticles dispersed in thermoplastic block copolymer SEBS (poly-styrene-coethylene-co-butylene-co-styrene) are shown to exhibit permittivity increases of up to 3.7 times, leading to 5.6 times improvement in electrostatic energy density, but with a trade-off in mechanical properties (an 8-fold increase in stiffness). The variation in both electrical and mechanical properties still allows for electromechanical improvement, such that a 27 % reduction of the electric field is found compared to the pure elastomer. Second, it is shown that the use of nanofiller conductive particles (carbon black (CB)) can lead to a strong increase of relative permittivity through percolation, however, with detrimental side effects. These are due to localized enhancement of the electric field within the composite, which leads to sharp reductions in electric field strength. Hence, the increase in permittivity does not make up for the reduction in breakdown strength in relation to stored electrical energy, which may prohibit their practical use. Third, a completely new approach for increasing the relative permittivity and electrostatic energy density of a polymer based on 'molecular composites' is presented, relying on chemically grafting soft p-conjugated macromolecules to a flexible elastomer backbone. Polarization caused by charge displacement along the conjugated backbone is found to induce a large and controlled permittivity enhancement (470 % over the elastomer matrix), while chemical bonding, encapsulates the PANI chains manifesting in hardly any reduction in electric breakdown strength, and hence resulting in a large increase in stored electrostatic energy. This is shown to lead to an improvement in the sensitivity of the measured electromechanical response (83 % reduction of the driving electric field) as well as in the maximum actuation strain (250 %). These results represent a large step forward in the understanding of the strategies which can be employed to obtain high permittivity polymer materials with practical use for electro-elastomer actuation.

Haptics Perception Devices Mobility and Communication

Haptics  Perception  Devices  Mobility  and Communication Book
Author : Poika Isokoski,Jukka Springare
Publisher : Springer
Release : 2012-05-30
ISBN : 364231404X
Language : En, Es, Fr & De

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Book Description :

This book and its companion volume, LNCS 7282 and 7283, constitute the refereed proceedings of the 8th International Conference, EuroHaptics 2012, held in Tampere, Finland, in June 2012. The 99 papers (56 full papers, 32 short papers, and 11 demo papers) presented were carefully reviewed and selected from 153 submissions. Part I contains the full papers whereas Part II contains the short papers and the demo papers.

Advances in Mechanisms Robotics and Design Education and Research

Advances in Mechanisms  Robotics and Design Education and Research Book
Author : Vijay Kumar,James Schmiedeler,S. V. Sreenivasan,Hai-Jun Su
Publisher : Springer Science & Business Media
Release : 2013-04-17
ISBN : 3319003984
Language : En, Es, Fr & De

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Book Description :

This book contains papers on a wide range of topics in the area of kinematics, mechanisms, robotics, and design, addressing new research advances and innovations in design education. The content is divided into five main categories headed ‘Historical Perspectives’, ‘Kinematics and Mechanisms’, ‘Robotic Systems’, ‘Legged Locomotion’, and ‘Design Engineering Education’. Contributions take the form of survey articles, historical perspectives, commentaries on trends on education or research, original research contributions, and papers on design education. This volume celebrates the achievements of Professor Kenneth Waldron who has made innumerable and invaluable contributions to these fields in the last fifty years. His leadership and his pioneering work have influenced thousands of people in this discipline.

World Congress on Medical Physics and Biomedical Engineering September 7 12 2009 Munich Germany

World Congress on Medical Physics and Biomedical Engineering September 7   12  2009 Munich  Germany Book
Author : Olaf Dössel,Wolfgang C. Schlegel
Publisher : Springer Science & Business Media
Release : 2010-01-04
ISBN : 9783642039003
Language : En, Es, Fr & De

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Book Description :

Present Your Research to the World! The World Congress 2009 on Medical Physics and Biomedical Engineering – the triennial scientific meeting of the IUPESM - is the world’s leading forum for presenting the results of current scientific work in health-related physics and technologies to an international audience. With more than 2,800 presentations it will be the biggest conference in the fields of Medical Physics and Biomedical Engineering in 2009! Medical physics, biomedical engineering and bioengineering have been driving forces of innovation and progress in medicine and healthcare over the past two decades. As new key technologies arise with significant potential to open new options in diagnostics and therapeutics, it is a multidisciplinary task to evaluate their benefit for medicine and healthcare with respect to the quality of performance and therapeutic output. Covering key aspects such as information and communication technologies, micro- and nanosystems, optics and biotechnology, the congress will serve as an inter- and multidisciplinary platform that brings together people from basic research, R&D, industry and medical application to discuss these issues. As a major event for science, medicine and technology the congress provides a comprehensive overview and in–depth, first-hand information on new developments, advanced technologies and current and future applications. With this Final Program we would like to give you an overview of the dimension of the congress and invite you to join us in Munich! Olaf Dössel Congress President Wolfgang C.

Biomimetic Robotic Artificial Muscles

Biomimetic Robotic Artificial Muscles Book
Author : Kwang Jin Kim,Xiaobo Tan,Hyouk Ryeol Choi,David Pugal
Publisher : World Scientific
Release : 2013-03-26
ISBN : 9814397490
Language : En, Es, Fr & De

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Book Description :

Biomimetic Robotic Artificial Muscles presents a comprehensive up-to-date overview of several types of electroactive materials with a view of using them as biomimetic artificial muscles. The purpose of the book is to provide a focused, in-depth, yet self-contained treatment of recent advances made in several promising EAP materials. In particular, ionic polymer-metal composites, conjugated polymers, and dielectric elastomers are considered. Manufacturing, physical characterization, modeling, and control of the materials are presented. Namely, the book adopts a systems perspective to integrate recent developments in material processing, actuator design, control-oriented modeling, and device and robotic applications. While the main focus is on the new developments in these subjects, an effort has been made throughout the book to provide the reader with general, basic information about the materials before going into more advanced topics. As a result, the book is very much self-contained and expected to be accessible for a reader who does not have background in EAPs. Based on the good fundamental knowledge and the versatility of the materials, several promising biomimetic and robotic applications such robotic fish propelled by an IPMC tail, an IPMC energy harvester, an IPMC-based valveless pump, a conjugated polymer petal-driven micropump, and a synthetic elastomer actuator-enabled robotic finger are demonstrated. Contents:IntroductionPhysical Principles of Ionic Polymer-Metal CompositesNew IPMC Materials and MechanismsA Systems Perspective on Modeling of Ionic Polymer-Metal CompositesConjugated Polymer Actuators: Modeling and ControlSynthetic Dielectric Elastomer MaterialsDielectric Elastomer ActuatorIntegrated Sensory Feedback for EAP ActuatorsDevice and Robotic Applications of EAPs Readership: Graduate students, academics and professionals in the field of materials engineering and robotics. Keywords:Artificial Muscles;Biomimetics;Robotics;Electroactive Polymers;EAPs;Ionic Polymer-Metal Composites;IPMCs;Dielectric Elastomers;Conjugated Polymer Actuators;Soft Actuators;Sensors;Synthetic Elastomers;Modeling;Control;PVDF