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Author : James W. High
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.98/5 ( download)
Download or read book Method of Fabricating NASA-Standard Macro-Fiber Composite Piezoelectric Actuators written by James W. High and published by . This book was released on 2003 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781723738548
Total Pages : 32 pages
Book Rating : 4.49/5 ( download)
Download or read book Method of Fabricating Nasa-Standard Macro-Fiber Composite Piezoelectric Actuators written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-16 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Macro-Fiber Composite actuator is a flexible piezoelectric composite device designed for controlling vibrations and shape deformations in high performance aerospace structures. A complete method for fabricating the standard NASA Macro-Fiber Composite actuator is presented in this document. When followed precisely, these procedures will yield devices with electromechanical properties identical to the standard actuator manufactured by NASA Langley Research Center.High, James W. and Wilkie, W. KeatsLangley Research CenterPIEZOELECTRIC ACTUATORS; FABRICATION; ELECTROMECHANICS; AIRCRAFT STRUCTURES; FIBER COMPOSITES; VIBRATION; SHAPES
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720618201
Total Pages : 28 pages
Book Rating : 4.08/5 ( download)
Download or read book Macro Fiber Piezocomposite Actuator Poling Study written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance and advantages of Piezocomposite Actuators are to provide a low cost, in-situ actuator/sensor that is flexible, low profile and high strain per volt performance in the same plane of poled voltage. This paper extends reported data for the performance of these Macrofiber Composite (MFC) Actuators to include 4 progressively narrower Intedigitized electrode configurations with several line widths and spacing ratios. Data is reported for max free strain, average strain per applied volt, poling (alignment of the electric dipoles of the PZT ceramic) voltage vs. strain and capacitance, time to poling voltage 95% saturation. The output strain per volt progressively increases as electrode spacing decreases, with saturation occurring at lower poling voltages. The narrowest spacing ratio becomes prone to voltage breakdown or short circuits limiting the spacing width with current fabrication methods. The capacitance generally increases with increasing poling voltage level but has high sensitivity to factors such as temperature, moisture and time from poling which limit its usefulness as a simple indicator. The total time of applied poling voltage to saturate or fully line up the dipoles in the piezoceramic was generally on the order of 5-20 seconds. Less sensitivity to poling due to the applied rate of voltage increase over a 25 to 500 volt/second rate range was observed.Werlink, Rudy J. and Bryant, Robert G. and Manos, DennisLangley Research CenterACTUATORS; PIEZOELECTRIC CERAMICS; FIBER COMPOSITES; FABRICATION; ELECTRIC POTENTIAL; LOW COST; STRAIN GAGES; CAPACITANCE; ELECTRIC DIPOLES; SHORT CIRCUITS; LEAD ZIRCONATE TITANATES
Author : T. H. Brockmann
Publisher : Springer Science & Business Media
ISBN 13 : 9048124352
Total Pages : 231 pages
Book Rating : 4.50/5 ( download)
Download or read book Theory of Adaptive Fiber Composites written by T. H. Brockmann and published by Springer Science & Business Media. This book was released on 2009-07-23 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive structural systems in conjunction with multifunctional materials facilitate technical solutions with a wide spectrum of applications and a high degree of integration. By virtue of combining the actuation and sensing capabilities of piezoelectric materials with the advantages of fiber composites, the anisotropic constitutive properties may be tailored according to requirements and the failure behavior can be improved. Such adaptive fiber composites are very well-suited for the task of noise and vibration reduction. In this respect the helicopter rotor system represents a very interesting and widely perceptible field of application. The occurring oscillations can be reduced with aid of aerodynamic couplings via fast manipulation of the angle of attack, being induced by twist actuation of the rotor blade. On the one hand the sensing properties may be used to determine the current state of deformation, while on the other hand the actuation properties may be used to attain the required state of deformation. The implementation of such concepts requires comprehensive knowledge of the theoretical context, which shall be illuminated in the work at hand from the examination of the material behavior to the simulation of the rotating structure.
Author : Raman P. Singh
Publisher : Springer Nature
ISBN 13 : 3030598683
Total Pages : 113 pages
Book Rating : 4.86/5 ( download)
Download or read book Mechanics of Composite, Hybrid and Multifunctional Materials , Volume 6 written by Raman P. Singh and published by Springer Nature. This book was released on 2021-04-15 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Composite, Hybrid, and Multifunctional Materials, Volume 6 of the Proceedings of the 2020 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the sixth volume of seven from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on a wide range of areas, including: Recycled Constituent Composites Nanocomposites Mechanics of Composites Fracture & Fatigue of Composites Multifunctional Materials Damage Detection & Non-destructive Evaluation Composites for Wind Energy & Aerospace Applications Computed Tomography of Composites Manufacturing & Joining of Composites Novel Developments in Composites
Author : Ruxu Du
Publisher : Springer
ISBN 13 : 3662468700
Total Pages : 380 pages
Book Rating : 4.08/5 ( download)
Download or read book Robot Fish written by Ruxu Du and published by Springer. This book was released on 2015-05-06 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive coverage on robot fish including design, modeling and optimization, control, autonomous control and applications. It gathers contributions by the leading researchers in the area. Readers will find the book very useful for designing and building robot fish, not only in theory but also in practice. Moreover, the book discusses various important issues for future research and development, including design methodology, control methodology, and autonomous control strategy. This book is intended for researchers and graduate students in the fields of robotics, ocean engineering and related areas.
Author : Jayantha Ananda Epaarachchi
Publisher : CRC Press
ISBN 13 : 1482226928
Total Pages : 545 pages
Book Rating : 4.28/5 ( download)
Download or read book Structural Health Monitoring Technologies and Next-Generation Smart Composite Structures written by Jayantha Ananda Epaarachchi and published by CRC Press. This book was released on 2016-09-15 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the increased use of composite materials in aerospace, energy, automobile, and civil infrastructure applications, concern over composite material failures has grown, creating a need for smart composite structures that are able to self-diagnose and self-heal. Structural Health Monitoring Technologies and Next-Generation Smart Composite Structures provides valuable insight into cutting-edge advances in SHM, smart materials, and smart structures. Comprised of chapters authored by leading researchers in their respective fields, this edited book showcases exciting developments in general embedded sensor technologies, general sensor technologies, sensor response interrogation and data communication, damage matrix formulation, damage mechanics and analysis, smart materials and structures, and SHM in aerospace applications. Each chapter makes a significant contribution to the prevention of structural failures by describing methods that increase safety and reduce maintenance costs in a variety of SHM applications.
Author : Isaac Andrew Henslee
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.16/5 ( download)
Download or read book Macrofiber Piezoelectric Composite for Lunar Exploration Actuator written by Isaac Andrew Henslee and published by . This book was released on 2010 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the nature and location of water and other resources on Earth's Moon is an essential component to the National Aeronautics and Space Administration's (NASA) space exploration efforts. To aid in these exploration efforts, an investigation into lightweight and reliable materials for a lunar valve actuator design has lead to characterizing the lifetime performance of the piezoelectric fiber composite, macro fiber composite (MFC). MFC's are thin rectangular patches made of polyimide film, epoxy and a single layer of rectangular lead zirconium titanate fibers and are commercially available. As a basis for this consideration, the useful life of the MFC is being characterized to determine the effect of temperature on the performance of the material as it is fatigued by cyclical piezoelectric excitation or actuation. The test specimen consist of the MFC laminated to a cantilevered stainless steel beam using epoxy and is actuated at the first resonant frequency of the beam laminate by the cyclic application of 1000 volts. Strain and beam tip displacement measurements are used as a basis for determining the performance of the MFC as it is cyclically actuated under various operating temperatures. The temperature of the beam laminate is held constant during cyclic actuation and cycled to failure or 250 million cycles, to determine the useful life of the MFC over a temperature range from -15°C to 145°C. The results of the experimentation efforts show a strong temperature dependence on operational life for the MFC. No significant degradation in operational performance was identified thru monitoring of the MFC, as the MFC was cyclically actuated up to the point of failure, regardless of temperature or actuation cycle. The results of the experimental testing can be used to better inform designs, such as actuators, using MFC in environments where operational temperatures differ from standard laboratory temperatures, as well as, to better design temperature controlled environments where MFC's are used as actuators.
Author : Rani Elhajjar
Publisher : CRC Press
ISBN 13 : 1439895910
Total Pages : 432 pages
Book Rating : 4.17/5 ( download)
Download or read book Smart Composites written by Rani Elhajjar and published by CRC Press. This book was released on 2013-12-14 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart Composites: Mechanics and Design addresses the current progress in the mechanics and design of smart composites and multifunctional structures. Divided into three parts, it covers characterization of properties, analyses, and design of various advanced composite material systems with an emphasis on the coupled mechanical and non-mechanical behaviors. Part one includes analyses of smart materials related to electrically conductive, magnetostrictive nanocomposites and design of active fiber composites. These discussions include several techniques and challenges in manufacturing smart composites and characterizing coupled properties, as well as the analyses of composite structures at various length and time scales undergoing coupled mechanical and non-mechanical stimuli considering elastic, viscoelastic (and/or viscoplastic), fatigue, and damage behaviors. Part two is dedicated to a higher-scale analysis of smart structures with topics such as piezoelectrically actuated bistable composites, wing morphing design using macrofiber composites, and multifunctional layered composite beams. The analytical expressions for characterization of the smart structures are presented with an attention to practical application. Finally, part three presents recent advances regarding sensing and structural health monitoring with a focus on how the sensing abilities can be integrated within the material and provide continuous sensing, recognizing that multifunctional materials can be designed to both improve and enhance the health-monitoring capabilities and also enable effective nondestructive evaluation. Smart Composites: Mechanics and Design is an essential text for those interested in materials that not only possess the classical properties of stiffness and strength, but also act as actuators under a variety of external stimuli, provide passive and active response to enable structural health monitoring, facilitate advanced nondestructive testing strategies, and enable shape-changing and morphing structures.
Author : A M Rajendran
Publisher : World Scientific
ISBN 13 : 9814476684
Total Pages : 601 pages
Book Rating : 4.83/5 ( download)
Download or read book Transformational Science And Technology For The Current And Future Force (With Cd-rom) - Proceedings Of The 24th Us Army Science Conference written by A M Rajendran and published by World Scientific. This book was released on 2006-11-08 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the reader with a unique opportunity to understand the basic and applied research and technology areas that support applications to enable Transformational capabilities for US Soldiers. The research papers are in line with the theme of the 24th Army Science Conference: “Transformational Science and Technology for the Current and Future Force,” emphasizing the critical role of Science and Technology in addressing the significant challenges posed by Global War On Terrorism while simultaneously developing Transformational capabilities for the Future Force.
