Dissertations / Theses on the topic 'Smart Materials'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Smart Materials.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Kuruwita-Mudiyanselage, Thilini D. "Smart Polymer Materials." Bowling Green State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1223652552.
Full textTaiwo, Adetoun. "SMART SUPERHYDROPHOBIC MATERIALS." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3209.
Full textYan, Zhuoqun. "Smart materials in dentistry." Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430701.
Full textKang, Inpil. "Carbon Nanotube Smart Materials." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109710134.
Full textMatta, Micaela <1987>. "Simulation of Smart Materials." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6813/1/phd_MicaelaMatta.pdf.
Full textMatta, Micaela <1987>. "Simulation of Smart Materials." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6813/.
Full textBecker, Ulrike. "Smart Surfaces in Biobased Materials." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30714.
Full textPh. D.
LENARDA, ANNA. "Smart materials for energy applications." Doctoral thesis, Università degli Studi di Trieste, 2019. http://hdl.handle.net/11368/2991056.
Full textIn the last decades, electrochemistry has been regarded as a powerful tool to address some of the key challenges that in the framework of sustainability and green energy. In particular, the application of smart, hierarchical materials as electrocatalysts is generating new opportunities for interesting developments. Nanostructured carbon has been heavily employed as a fundamental component for the proposed catalytic materials due to its outstanding electronic and textural properties. This thesis focuses on the exploitation of strategically designed materials based on carbon as electrocatalysts to be used in devices such as new generation fuel cells, electrolyzers for the production of hydrogen peroxide and sensors for its electrochemical detection. Each of these devices is envisioned as a way of reducing the environmental impact, by either being a sustainable source of energy, or substituting energy consuming and non-environmentally friendly processes. In particular, a hybrid Pd/CeO2/C material, prepared through a strategic protocol that allows an intimate contact among the three phases, has been employed as anodic electrocatalyst in both Anion Exchange Membrane Fuel Cells (AEM-FC) and Direct Alcohol Fuel Cells (DAFCs) working in alkaline media and fed with biomass derived polyalcohols. Concerning H2O2 electrosynthesis, N-doped carbon embedding Co nanoparticles have been studied for the Oxygen Reduction Reaction (ORR) in acidic environment, and the material’s outstanding selectivity has been correlated to its N-type species distribution, as well as its porosity and the indirect electronic interaction between the doped carbon phase and the internal metal. Finally, a metal-free electrosensor for the detection of hydrogen peroxide has been produced exploiting the electronic properties of a -COOH decorated graphene, obtained through a controlled functionalization protocol. In all cases, the strategic synthetic procedure gives rise to materials with enhanced catalytic performances in terms of activity, selectivity and stability, and the work has been communicated through publication (already published or in the process of being published) in peer-reviewed journals.
Molloy, Paul. "Smart materials for subsea buoyancy control." Thesis, University of Glasgow, 2000. http://theses.gla.ac.uk/6161/.
Full textShelvay, Alicia M. (Alicia Margaret). "Reinforced concrete : applicability of smart materials." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74413.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 44-46).
With aging infrastructure, not only in the United States, but worldwide, we look toward designing structures which can withstand the test of time. Creating structures that can adapt to changes in the environment and provide better performance is at the forefront of current research. Reinforced concrete, one of the most widely used materials, can be reinvented using this philosophy. In this thesis, smart materials are classified as materials which can provide sensing, actuation or self-repair. Three different smart materials were studied including self-healing concrete which provides self-repair, shape memory alloys as reinforcement for reinforced concrete which provides actuation and carbon fiber reinforced concrete which provides sensing. It was found that each smart material had potential to improve the performance of reinforced concrete structures. Factors that affect larger scale implementation are discussed.
by Alicia M. Shelvay.
M.Eng.
Trevor, Susie. "pH responsive chitosan based 'smart' materials." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613408.
Full textKumpfer, Justin Richard. "Utilizing Metallosupramolecular Polymers as Smart Materials." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1333553702.
Full textShah, Syed Asim Ali. "Micro-mechanics modelling of smart materials." Thesis, Sheffield Hallam University, 2016. http://shura.shu.ac.uk/20349/.
Full textBaruah, Arabinda. "Smart nanostructured materials for water purification." Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7002.
Full textVan, der Horn Gert. "Integrated smart sensors calibration." Delft, Netherlands : Delft University Press, 1997. http://books.google.com/books?id=tHhRAAAAMAAJ.
Full textRamesh, Prashanth. "Smart Materials for Electromagnetic and Optical Applications." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343821988.
Full textGent, Ian Oliver. "Biologically inspired adaptive camouflage : polychromatic smart materials." Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738293.
Full textMoss, Scott. "Modelling and experimental validation of the acoustic electric feedthrough technique." Fishermans Bend, Victoria : Defence Science and Technology Organisation, 2008. http://hdl.handle.net/1947/9738.
Full textMsomi, Velaphi. "Modelling and testing smart aileron servo tabs : developing simulation tools for smart materials." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2150.
Full textThis dissertation addresses the development and the testing of a simulation tool to be used to predict the behaviour of smart material/structures. Along with the development of the simulation tool, a new form of the model describing the behaviour of shape-memory alloy was developed and implemented. The proposed model was developed based on the existing cosine model, conventionally used in literature, but it uses hyperbolic tangent functions. The hyperbolic tangent function was chosen so as to allow the simulation of any range of temperatures. Experiments were performed to obtain the parameters to be used in the simulation and to validate the numerical results. Two different simulations were performed: a one dimensional FEA analysis with a two dimensional orientation (NiTi SMA wire simulation) and a three dimensional FEA analysis (NiTi SMA plate) [Msomi and Oliver, 2015]. Alongside the FEA analysis, two experiments were performed with the purpose of obtaining the material parameters to be used in FEA analysis and to compare the FEA results to the experimental results.
Airbus Company
Akin, Tugce. "Communication Of Smart Materials: Bridging The Gap Between Material Innovation And Product Design." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610999/index.pdf.
Full textInformation Hierarchy for Smart Materials Communication for Industrial / Product Design&rsquo
. Industrial and product designers are invited to use the findings of the thesis to assist in developing a common smart materials language and culture, enriched by details, technicalities, opportunities, and creative and innovative material attributes. The study commences with the creation of a concise and compact reservoir of technical knowledge on smart materials and critically contrasts two established systems of classification for smart materials. Then, the subject of materials information appropriate to industrial design is discussed, highlighting channels through which smart materials information may be communicated at an optimum level so as to be amenable to exploitation by industrial designers. A sectoral analysis of smart materials use follows, including the presentation of factors that may hinder their more extensive exploitation in major industrial sectors. v The thesis concludes that smart materials have potential to initiate a breakthrough in the materials universe, and that industrial designers have a role in promoting smart materials knowledge, the capabilities of smart materials, and their innovation possibilities. It is recomended that since smart materials are a new generation of materials quite different from the conventional, they be promoted carefully through the proposed Information Hierarchy.
Prazzo, Carlos Eduardo [UNESP]. "Análise modal de uma estrutura do tipo viga utilizando materiais piezelétricos (PVDF) como sensores." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/94521.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Esse trabalho discute o uso dos materiais piezelétricos, mais especificamente, o Polyvinylidene Fluoride (PVDF) e o Lead Zirconate Titatane (PZT) na análise modal experimental (AME) de estruturas mecânicas. Materiais piezelétricos, também chamados de materiais inteligentes, têm se consolidado como uma nova tecnologia que mostra um grande potencial de aplicação em diferentes áreas da engenharia. Esse tipo de material exibe um acoplamento entre multi-domínios físicos, como por exemplo o acoplamento eletro-mecânico, o térmo-magnético, etc. O acoplamento eletro-mecânico produz um deslocamento elétrico quando o material é sujeito a uma tensão mecânica (efeito direto) e um deformação mecânica quando esse material é submetido a um campo elétrico (efeito inverso). Assim, principalmente por conta desses efeitos, seu uso no campo da análise modal experimental torna-se uma interessante questão a ser investigada. A incorporação de novas tecnologias nos testes estruturais pode agregar novos conhecimentos e avanços tanto na análise modal baseada na relação entrada-saída da estrutura, quanto na mais recente técnica, a análise modal baseada apenas na resposta das mesmas. Os conceitos teóricos para o desenvolvimento são apresentados e discutidos neste trabalho, onde é mostrada a análise modal de uma viga utilizando tanto sensores e atuadores convencionais quanto os produzidos com materiais inteligentes. Os testes de análise modal da viga foram feitos utilizando diferentes combinações de sensores e atuadores e isso pode mostrar as diferenças da estimativa de modos utilizando materiais piezelétricos. Também é apresentada a formulação da relação entre os modos em deslocamento e os modos com diferença de inclinação obtidos com materiais piezelétricos e, finalmente, uma comparação dos resultados obtidos pelas diferentes técnicas. Os testes apresentados mostram...
This work discusses the use of piezoelectric materials, more specifically, Polyvinylidene Fluoride (PVDF) and Lead Zirconate Titanate (PZT) for experimental modal analysis (EMA) of mechanical structures. Piezoelectric materials also called smart materials have becoming a consolidated new technology that shows a large potential of application for different engineering areas. These materials exhibit a multi physics domain field coupling like mechanical and electrical coupling domains, thermal and magnetic coupling and etc. The electro-mechanical coupling domains of the material produces an electric displacement when the material is subject to a mechanical stress (direct-effect) and a mechanical strain when the material is submitted to an electric field (inverse effect). So, mainly due to these effects, the use in the experimental modal analysis field appears to be an interesting issue to be investigated. The incorporation of this new technology in the structural tests might aggregate new acknowledgments and advances in the well consolidated input-output based modal analysis techniques as well as in the more recent output only-based modal analysis. This work aims to present some contribution in this area by using piezoelectric sensors, instead of the conventional ones like accelerometers for modal analysis of mechanical structures. The theoretical concepts and background for the developing of the work are presented and discussed, it is also presented the modal analysis of a beam like structure using conventional sensors/actuators and piezoelectric materials. The modal analysis tests of the beam are conducted using different kinds of sensors/actuator and they give some insight of the difference of the estimated modes shapes by using piezoelectric materials. It is also presented a formulation that shows the relation between... (Complete abstract click electronic access below)
Elshafei, Mostafa Adnan. "Smart composite plate shape control using piezoelectric materials." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA320548.
Full textDissertation supervisor(s): B.N. Agrawal. "September 1996." Includes bibliographical references (p. 111-118). Also available online.
Bravo, Rafael. "Vibration control of flexible structures using smart materials." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0034/NQ66256.pdf.
Full textVili, Yvonne Y. F. Chan. "Designing smart textiles based on shape memory materials." Thesis, Heriot-Watt University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444799.
Full textNeqal, Mehdi. "Smart polymeric materials by ring-opening metathesis polymerization." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0658/document.
Full textThe aim of this Thesis work was to address the issue of microbial contamination inside fuel tanks. Microorganisms induce the chemical corrosion of airplane tank walls due to their production of organic acids. Biocide compounds are typically used to inhibit these microorganisms, either in the form of organic small molecules, or most commonly as chromium-based coatings on the walls to hinder chemical corrosion. Organic biocides need to be replenished regularly, while chromium is a particularly dangerous compound targeted by the European Registration, Evaluation and Authorization of Chemicals (REACh) legislation due to its carcinogenic nature. A replacement approach selected for this project was the development of a smart system of multifunctional polymeric particles synthesized by dispersion ROMP, which can deliver a biocide following an acidic trigger due to the presence of microorganisms. The polymerization utilized a linear α-norbornenyl-polyglycidol macromonomer as a reactive surfactant. The hydroxyl-rich polyglycidol backbone of the macromonomer was beneficial for the conjugation of dodecylamine through a pH-sensitive imine bond and permitted the preparation of highly functionalized bioactive particles. A proof of concept for the pH sensitivity of the system was provided and the antifungal efficacy of the biocide-functionalized macromonomer and particles was verified. The particles were also integrated in a coating formulation to simulate their application on tank walls. The qualities of the original coating were preserved even after prolonged exposure to corrosive conditions, making this system viable for its foreseen application
Enemuoh, Emmanuel Ugochukwu. "Smart drilling of advanced fiber reinforced composite materials /." free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9998482.
Full textKoen, Yolande. "Synthesis and investigation of smart nanoparticles." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5356.
Full textENGLISH ABSTRACT: The use of various ‘smart materials’ (briefly meaning materials that respond to a change in their environment) is currently of interest to both academics and industry. The primary aim of the current study was to entrap photochromic (PC) dyes in miniemulsions, as a means to improve their fatigue resistance, thus synthesizing smart nanoparticles. In the coatings industry the use of aqueous systems is becoming a common requirement for health and environmental reasons. Miniemulsion entrapment allows the direct dispersion of PC dyes into aqueous systems while allowing for the opportunity to tailor-make the host matrix in order to obtain a suitable PC response and improved fatigue resistance. The optimal instrument set-up required to establish the PC response of films of the so-called smart nanoparticles (i.e. PC miniemulsions) was determined. A UV-Vis instrument with a chip-type UV LED mounted inside for activation of the samples provided PC response results. A tungsten lamp with filter provided deactivation of the samples. A stable butyl methacrylate (BMA) miniemulsion formulation was established by conducting a design of experiments. A chromene and spironapthoxazine (SNO) PC dye were entrapped in the BMA miniemulsion. A hindered amine light stabiliser (HALS) was also entrapped with the SNO dye in the BMA miniemulsion to further improve the fatigue resistance. The following PC properties of the smart nanoparticles films were evaluated: colourability, thermal decay rate, half-life and fatigue resistance. To compare results with conventional systems, a BMA solution polymer was prepared. The SNO dye and different concentrations of the HALS were mixed with the BMA solution polymer. In comparison to the SNO smart nanoparticles the chromene smart nanoparticles films had lower colourability, but better fatigue resistance. Incorporating HALS at levels of 0.5–2% in the BMA miniemulsion with PC dye did not lead to any significant improvement in fatigue resistance, yet films of the BMA solution polymer showed some improvement. SNO dye incorporated at 1% gave similar colourability in both miniemulsion and in solution polymer, yet the fatigue resistance of the films of the PC miniemulsions was much better.
AFRIKAANSE OPSOMMING: Die gebruik van verskeie “slim materiale’ (kortliks beskryf as materiale wat reageer op `n verandering in hul omgewing) is tans van belang vir beide akademici en die industrie. Die hoofdoel van hierdie studie was om miniemulsietegnologie te gebruik om fotochromiese (FC) kleurstowwe vas te vang, vir die sintese van slim nanopartikels, om sodoende die weerstand teen afgematheid te verbeter. In die verfindustrie word die gebruik van waterbasissisteme meer algemeen weens gesondheids- en omgewingsredes. Die gebruik van miniemulsie sisteme om materiale vas te vang maak dit moontlik om FC kleurstowwe direk in waterbasissisteme te meng. Die sintese van `n unieke gasheer matriks word benodig om die optimum FC verandering te toon en weerstand teen afgematheid te verbeter. Om die FC verandering van die sogenaamde slim nanopartikel films (d.w.s. FC miniemulsies) te ondersoek was `n gepaste instrumentele opstelling nodig. Dit is vasgestel dat `n UV-Vis instrument waarin `n skyfie-tipe UV LED gemonteer is vir aktivering van die monsters, reproduseerbare resultate gegee het. Die monsters is gedeaktiveer deur gebruik te maak van `n tungsten lig met ‘n filter. `n Eksperimentele ontwerp is toegepas om `n stabiele butielmetakrielaat (BMA) miniemulsie formulasie te verkry. `n ‘Chromene’ en ‘spironapthoxazine’ (SNO) FC kleurstof is in die BMA miniemulsie vasgevang tesame met `n verhinderde amien ligstabiliseerder (VALS) om die weerstand teen afgematheid verder te verbeter. Die volgende FC eienskappe van die slim nanopartikels is gemeet: kleurintensiteit, tempo van termiese verwering, half-lewe en weerstand teen afgematheid. `n BMA polimeeroplossing is berei om resultate mee te vergelyk. Die SNO kleurstof en verskillende konsentrasies van die VALS is met die BMA polimeeroplossing gemeng. In vergelyking met die slim SNO nanopartikels het die intelligente chromene nanopartikelfilms `n swakker kleurintensiteit gehad, maar `n hoër weerstand teen afgematheid. Die gebruik van 0.5–2% VALS in die BMA miniemulsie met FC kleurstof het minimale verbetering in weerstand teen afgematheid getoon, maar daar was wel `n beduidende verbetering in die geval van films met FC kleurstof in `n BMA polimeeroplossing. Byvoeging van 1% SNO kleurstof in `n BMA miniemulsie of polimeeroplossing het dieselfde kleurintensiteit gelewer, maar die weerstand teen afgematheid van die FC miniemulsie was baie beter.
Tan, Khooi Yeei. "Smart surfaces using responsive polymer brushes." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607743.
Full textRiddle, Brian K. "General purpose, data driven, extensible, computer interface for smart sensors." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/18920.
Full textRodríguez, García Bárbara. "Prussian blue derivatives as smart materials for technological applications." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/456996.
Full textLos hexacianometalatos de metales de transición, isoestructurales al azul de Prussia (PB), son un tipo muy importante de compuestos de coordinación inorgánicos. En general, son no estequiométricos y de valencia mixta, lo que les convierte en materiales con una química muy rica y versátil y de los que se han descrito múltiples propiedades y aplicaciones. En esta tesis, exploramos algunas modificaciones de estos materiales para abordar algunos retos tecnológicos. En primer lugar, exploramos la capacidad catalítica de los análogos de cobalto hierro (CoHFe) en la reacción de oxidación de agua. Comprobamos que, además de ser activos y eficientes en un amplio rango de pH, mantenían su capacidad catalítica estable en el tiempo, incluso en agua de mar. A continuación, incorporamos este catalizador en dispositivos. Por un lado, en el ánodo de un electrolizador de membrana (PEM). Por el otro, conociendo la estabilidad del CoHFe en agua de mar, diseñamos y construimos un electrolizador de agua de mar operativo a escala de laboratorio. También sintetizamos un imán quiral a través de la incorporación de un aminoácido natural (L-prolina) en la síntesis de vanadio hexacianocromato (VHCr). Obtuvimos y caracterizamos una serie de imanes quirales que exhiben magnetización espontanea a temperaturas críticas altas, cercanas a temperatura ambiente, y que no han sido reportadas antes. Finalmente, desarrollamos análogos del azul de Prusia de manganeso-hierro (MnHFe) como potenciales agentes de contraste multimodales. Según la bibliografía estos análogos son potenciales agentes de contraste no tóxicos en resonancia magnética nuclear y microscopía óptica (generación de segundo armónico). Para ampliar estas capacidades, aumentamos su coeficiente de extinción frente a la irradiación de rayos X incorporando cationes alcalinos en su estructura y demostramos con éxito que estos materiales atenúan los rayos X en mayor medida que los agentes de contraste para tomografía comerciales. En resumen, hemos demostrado que modificando los componentes de partida de los PBAs se pueden modular sus propiedades. Además, su estructura robusta y su capacidad y facilidad para ser procesados, mantienen abiertas múltiples oportunidades para aplicaciones tecnológicas futuras.
Transition metal hexacyanometallates are an important class of inorganic coordination compounds, isostructural with the original mixed-valence Prussian blue (PB). Their non-stoichiometric nature and chemical variety make of them a versatile type of molecule-based materials. Indeed, a wide range of applications has been described. In this thesis, we explored further applications for Prussian blue analogues, modifying their composition and processing to target several technological issues. First, the catalytic performance of cobalt iron Prussian blue analogues (CoHFe) to promote oxygen evolution reaction in a water splitting was tested. Catalyst nanoparticles were active and efficient in a wide pH range and is stable and functional in the long run even in sea water. Then we incorporate this catalyst in full-cell devices. On one hand, we built and tested a polymer electrolyte membrane (PEM) containing CoHFe as water oxidation electrocatalyst. On the other, we took advantage of CoHFe stability in sea water for the design and construction of a lab scale seawater electrolyzer. We also report our aims to obtain a chiral magnet. Through incorporation of a natural aminoacid (L-proline) in the synthesis of the vanadium-chromium Prussian blue analogues (VHCr), we were able to obtain, and characterize chiral magnets that exhibit spontaneous magnetization at the highest temperatures ever reported, and close to room temperature. Finally, we present our studies for the development of manganese iron Prussian blue analogues (MnHFe) as multimodal contrast agent. These derivatives are potential non-toxic contrast agents nuclear magnetic resonance and optical microscopy (second harmony generation) diagnosis techniques. To expand their multimodal features, we increase their extinction coefficient versus x-ray irradiation by incorporated alkaline metal cations to their structure. We successfully demonstrate that these materials show x-ray attenuation capabilities superior to state-of-the-art commercial tomography contrast agents. In summary, we have demonstrated the versatility of PBAs for multiple applications by modifying building blocks and components. The robustness of the structure, and the multiple redox/composition/processing parameters maintain open unlimited opportunities for potential technological applications.
Brufau, Penella Jordi. "Smart materials for microrobotics motion control and power harvesting." Doctoral thesis, Universitat de Barcelona, 2009. http://hdl.handle.net/10803/1512.
Full textFirst of all in this thesis the use of piezoelectric polymers and ionic polymers as materials for motion control of microrobots is studied. Their flexibility opens the door to new applications for microrobot systems as is the case of biomimetics. The first application regards the use of piezoelectric polymers in insect-like mm3 microrobot. The microrobot is composed with three legs and one antenna or tool for object collision based on piezoelectric polymers. The object collision tool is used as a sensor for motion control to avoid collisions with other objects. The work presented consists on the development of theoretical models to predict the motion of he leg and the tool of the microrobot. The second application regards the development of a control system for controlling the motion of an ionic polymer IPMC underwater. It is difficult to obtain physical models that describe the motion of these materials, thus it is important to design control strategy to work with IPMCs. Furthermore in this thesis, the problem of manufacturing electrodes for IPMC is also treated.
In the second part of the thesis the use of piezoelectric ceramics to harvest power from mechanical vibrations is studied. Piezoelectric ceramics have higher energy densities compared with other methods for power harvesting from vibrations. In comparison with the piezoelectric polymers, the piezoelectric ceramics produce voltages and current levels more acceptable. From the study performed in this thesis the conditions for a maximum power generation are obtained and an optimum electronic circuit for energy storage and management is designed. At the end of the thesis the capabilities to harvest power using ionic polymers are studied.
KEY WORDS: Smart Materials, Microrobotic, Harvesting, Motion Control, Fonic Polimer, FPMC Piezoelectric, Modelling
Aquesta tesis es centra en l'ús de materials "smart" o intel·ligents en aplicacions de microrobòtica. Al llarg de la tesi treballem amb tres famílies de materials "smart" diferents: les ceràmiques piezoelèctriques, els polímers piezoelèctrics i els polímers iònics coneguts com Ionic Polymer Metal Composites (IPMC). Aquests materials tenen en comú que al aplica'ls-hi un camp elèctric pateixen una deformació mecànica mentre que si els sotmetem a una deformació mecànica, aquests materials pateixen una variació en la seva càrrega elèctrica interna. Degut a aquestes propietats aquests materials poden ser utilitzats com a sensors o com a actuadors.
A la primera part de la tesi estudiem l'ús dels polímers piezoelèctrics i dels polímers iònics per al control del moviment dels microrobots. La primera aplicació que es presenta tracta d'un microrobot de dimensions mm3 que utilitza els polímers piezoelèctrics com a potes i com a sensors de col·lisió. Tot seguit presentem una aplicació a on els IPMCs són utilitzats com a microposicionadors treballant sota de l'aigua.
A la segona part de la tesis estudiem la viabilitat d'utilitzar les ceràmiques piezoelèctriques i els polímers iònics per a generar energia a partir de vibracions mecàniques residuals ambientals. L'estudi presentat determina els nivells de potència generats i les condicions òptimes per a la generació de la màxima potencia.
Palmer, Nathan Reed. "Smart Composites evaluation of embedded sensors in composite materials /." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/palmer/PalmerN0809.pdf.
Full textLedendal, Marie. "Chromatic chlorophyll : Conceptual hospital textiles with chromatic Smart Materials." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19626.
Full textOrth, Margaret A. (Margaret Ann) 1964. "Sculptured computational objects with smart and active computing materials." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8674.
Full textIncludes bibliographical references (leaves 325-328).
This thesis presents the creative, technological, and philosophical means and methodology, by which technology artists and researchers can materially and sculpturally transform physical computing technology from hard, remotely-designed, plastic shells, into intimately created, sensual computing objects and artifacts. It asserts that the rigid, square, and prefabricated physical materials of computing technology are a fundamental technological and artistic limitation to anyone who wishes to sensually transform physical computing technology, or develop a rich artistic vocabulary for it. Smart and active sculptural computing materials are presented as a solution to this problem. Practically, smart computing materials reduce the number of separate, rigid, and square prefabricated parts required to create physical computing objects. Artistically, active sculptural computing materials give artists and designers the ability to directly manipulate, shape, experiment with, and therefore aesthetically understand the real, physical materials of computing technology. Such active design materials will also enable creative people to develop a meaningful artistic relationship between physical form and computation. The total contributions of this thesis include a proposal for a future three-dimensional design/technology practice, a portfolio of sensually transformed expressive computational objects (including new physical interfaces, electronic fashions, and embroidered musical instruments), and the smart and active sculptural computing materials and processes (in this case smart textiles), which make that transformation possible. Projects from the design portfolio include: The Triangles, and its applications; Electronic Fashions, including the Firefly Dress and Necklace, New Year's Eve Ball Gown, and Serial Suit; The Musical Jacket; Electronic Tablecloths; and a series of Embroidered Musical Instruments with embroidered pressure sensors. Contributions from the supporting technical area include: the first fabric keypad (a row and column switch matrix), a new conductive yarn capable of tying and electrical/mechanical knot, an advanced process for machine embroidering highly conductive, flexible and visually diverse electrodes, an empirical model of complex impedance sensing, and a definition of and test for the machine sewability and flexibility of yarns. These contributions are presented in three sections: 1) the supporting arguments, and philosophy of materiality and computation behind this work, 2) the design portfolio, and 3) the supporting technical story.
by Margaret A. Orth.
Ph.D.
Turkmen, Serkan. "Application of smart materials for vibration reduction in ships." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23159.
Full textLiu, Mengmeng. "Self-assembled Photo-responsive Nanostructures for Smart Materials Applications." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1494160345663184.
Full textMatsouka, Dimitroula. "Efficiency and durability of wearable smart materials and structures." Thesis, University of Bolton, 2018. http://ubir.bolton.ac.uk/1767/.
Full textGino, Maria Elena <1990>. "Nanostructured smart materials as functional components of medical devices." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10439/3/Tesi_Maria%20Elena%20Gino.pdf.
Full textBELLACICCA, ANDREA. "SMART MATERIALS FOR STRETCHABLE ELECTRONICS, SENSORS AND SOFT ACTUATION." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/476724.
Full textPrazzo, Carlos Eduardo. "Análise modal de uma estrutura do tipo viga utilizando materiais piezelétricos (PVDF) como sensores /." Ilha Solteira : [s.n.], 2011. http://hdl.handle.net/11449/94521.
Full textBanca: Luiz de Paula do Nascimento
Banca: Roberto Gil Annes da Silva
Resumo: Esse trabalho discute o uso dos materiais piezelétricos, mais especificamente, o Polyvinylidene Fluoride (PVDF) e o Lead Zirconate Titatane (PZT) na análise modal experimental (AME) de estruturas mecânicas. Materiais piezelétricos, também chamados de materiais inteligentes, têm se consolidado como uma nova tecnologia que mostra um grande potencial de aplicação em diferentes áreas da engenharia. Esse tipo de material exibe um acoplamento entre multi-domínios físicos, como por exemplo o acoplamento eletro-mecânico, o térmo-magnético, etc. O acoplamento eletro-mecânico produz um deslocamento elétrico quando o material é sujeito a uma tensão mecânica (efeito direto) e um deformação mecânica quando esse material é submetido a um campo elétrico (efeito inverso). Assim, principalmente por conta desses efeitos, seu uso no campo da análise modal experimental torna-se uma interessante questão a ser investigada. A incorporação de novas tecnologias nos testes estruturais pode agregar novos conhecimentos e avanços tanto na análise modal baseada na relação entrada-saída da estrutura, quanto na mais recente técnica, a análise modal baseada apenas na resposta das mesmas. Os conceitos teóricos para o desenvolvimento são apresentados e discutidos neste trabalho, onde é mostrada a análise modal de uma viga utilizando tanto sensores e atuadores convencionais quanto os produzidos com materiais inteligentes. Os testes de análise modal da viga foram feitos utilizando diferentes combinações de sensores e atuadores e isso pode mostrar as diferenças da estimativa de modos utilizando materiais piezelétricos. Também é apresentada a formulação da relação entre os modos em deslocamento e os modos com diferença de inclinação obtidos com materiais piezelétricos e, finalmente, uma comparação dos resultados obtidos pelas diferentes técnicas. Os testes apresentados mostram... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This work discusses the use of piezoelectric materials, more specifically, Polyvinylidene Fluoride (PVDF) and Lead Zirconate Titanate (PZT) for experimental modal analysis (EMA) of mechanical structures. Piezoelectric materials also called smart materials have becoming a consolidated new technology that shows a large potential of application for different engineering areas. These materials exhibit a multi physics domain field coupling like mechanical and electrical coupling domains, thermal and magnetic coupling and etc. The electro-mechanical coupling domains of the material produces an electric displacement when the material is subject to a mechanical stress (direct-effect) and a mechanical strain when the material is submitted to an electric field (inverse effect). So, mainly due to these effects, the use in the experimental modal analysis field appears to be an interesting issue to be investigated. The incorporation of this new technology in the structural tests might aggregate new acknowledgments and advances in the well consolidated input-output based modal analysis techniques as well as in the more recent output only-based modal analysis. This work aims to present some contribution in this area by using piezoelectric sensors, instead of the conventional ones like accelerometers for modal analysis of mechanical structures. The theoretical concepts and background for the developing of the work are presented and discussed, it is also presented the modal analysis of a beam like structure using conventional sensors/actuators and piezoelectric materials. The modal analysis tests of the beam are conducted using different kinds of sensors/actuator and they give some insight of the difference of the estimated modes shapes by using piezoelectric materials. It is also presented a formulation that shows the relation between... (Complete abstract click electronic access below)
Mestre
Gummadi, Lakshmana Nagesh Babu. "Active control of delaminations in smart composite structures." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/13022.
Full textHota, Sandilya. "Development and evaluation of smart materials for structural health monitoring." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4470.
Full textTitle from document title page. Document formatted into pages; contains xi, 87 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 86-87).
Biehlig, Ekaterina. "Design of Smart Polymeric Materials with Responsive / Adaptive Adhesion Properties." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-118293.
Full textLobez, Comeras Jose Miguel. "New functional polymers for sensors, smart materials and solar cells." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73367.
Full textVita. Cataloged from PDF version of thesis.
Includes bibliographical references.
Organic polymers can be used as the active component of sensors, smart materials, chemical-delivery systems and the active layer of solar cells. The rational design and modification of the chemical structure of polymers has enabled control over their properties and morphology, leading to the advancement of nanotechnology. A deeper understanding of structure-property relationships, as described in this thesis, affords control over the nanostructure of devices made from these macromolecular materials, which is crucial to the optimization of their performance. In Chapter 1, a new sensor for ionizing radiation based on composites of electron beam lithography resists, poly (olefin sulfone)s (POSs), and multiwalled carbon nanotubes is presented. The polymeric active component is radiation labile and its degradation after a sensing event leads to morphological and electrical changes in the composite at the nanoscale. As a result, a signal can be detected. Systematic sensitivity improvements can be accomplished by rational modifications of the chemical structure of the polymer side-chains. Orthogonal postpolymerization modifications performed using "click" chemistry, incorporate functional groups capable of increasing either the homogeneity of the composite, or its opacity towards radiation. In Chapter 2, a smart hybrid polymer composed of a POS and a silicone linked by "click" chemistry is described. By tuning the chemical structure of these two components and varying their ratio, composites with different mechanical properties and hardness can be achieved. This elastomeric smart material exhibits switchable mechanical properties: exposure to mild bases triggers disassembly into its monomers and individual constituents. In Chapter 3, the design, synthesis and properties of new polymer surfactant additives for photovoltaic devices is shown. The AB alternating regioregular polythiophene copolymer additives are obtained via a combinatorial approach, and contain functional groups in every other repeat unit. In Chapter 4 incorporation of small amounts of these polymer additives (0.25 weight %) is shown to result in large increases of up to 30% in the power conversion efficiency of organic solar cells consisting primarily of the benchmark system of poly (3-hexylthiophene) and Phenyl-C6 1-butyric acid methyl ester (PCBM) as the active layer. This effect is mainly due to the presence of dipoles at the interface of the bulk heterojunction introduced by the additives, which prevent charge recombination and lead to increases in the photocurrent collected across the polymer-fullerene interface. In Chapter 5, the synthesis of liquid crystalline polymer brushes is described, and their supramolecular and self-assembly properties are studied. The solid-state ordering and alignment properties of these highly substituted polymers can be affected by chemically tuning their mesogenic oligomeric side-chains, the length of the polymer backbone and the degree of crosslinking. The morphologies obtained with these macromolecules are interesting from the point of view of future photovoltaic applications.
by Jose Miguel Lobez Comeras.
Ph.D.
Berglin, Lena. "Interactive Textile Structures : Creating Multifunctional Textiles based on Smart Materials." Doctoral thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3490.
Full textCremin, Neal. "Asymmetric synthesis of liquid crystalline materials and chiral smart moelcules." Thesis, Kingston University, 2001. http://eprints.kingston.ac.uk/20675/.
Full textVones, Katharina Bianca. "Towards the uncanny object : creating interactive craft with smart materials." Thesis, University of Dundee, 2017. https://discovery.dundee.ac.uk/en/studentTheses/2d9a7303-4fd7-4110-ae83-6438904108a5.
Full textBhargava, Aarushi. "Dynamics of smart materials in high intensity focused ultrasound field." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/97994.
Full textDoctor of Philosophy
Smart materials are a type of intelligent materials that have the ability to respond to external stimuli such as heat, light, and magnetic fields. When these materials respond, they can change their structural, thermodynamical, mechanical or chemical nature. Due to this extraordinary property, smart materials are being used in many applications including biomedical, robotic, space, microelectronics, and automobile industry. However, due to increased sensitivity and need for safety in many applications, a biologically safe, wireless, and efficient trigger is required to actuate these materials. In this dissertation, sound is used as an external trigger to actuate two types of smart materials: shape memory polymers (SMPs) and piezoelectric materials. SMPs have an ability to store a temporary (arbitrarily deformed) shape and return to their permanent shape when exposed to a trigger. In this dissertation, focused sound induced thermal energy acts as a trigger for these polymers. A novel concept of focused ultrasound actuation of SMP-based drug delivery capsules is proposed as a means to solve some of the challenges being faced in the field of controlled drug delivery. Piezoelectric materials have an ability to generate electric power when an external mechanical force is applied and vice versa. In this study, sound pressure waves supply the external force required to produce electric current in piezoelectric disks, as a method for achieving power transfer wirelessly. This study aims to solve the current problem of low efficiency in acoustic power transfer systems by focusing sound waves. This dissertation addresses the fundamental physics of high intensity focused ultrasound actuation of smart materials by developing comprehensive mathematical models and systematic experimental investigations, that have not been performed till now. The developed models enable an in-depth analysis of individual parameters including nonlinear material behavior, acoustic nonlinearity and resonance phenomena that affect the functioning of these smart systems. These mathematical frameworks also serve as groundwork for developing more complex systems.
Stauffer, Erica F. "Reinterpreting Skins and Systems: Integrating Smart Materials with Traditional Construction." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337715982.
Full textKang, Huaizhi. "Molecular engineering of nucleic acid towards functional and smart materials /." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041192.
Full text