Готові списки джерел за темами / Flexible fibers

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Добірка наукової літератури з теми "Flexible fibers"

Автор: Grafiati

Опубліковано: 13 квітня 2024

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Статті в журналах з теми "Flexible fibers"

Parasakthibala, Ms G., and Mrs A. S. Monisha. "A Review on Natural Fibers; Its Properties and Application Over Synthetic Fibers." International Journal for Research in Applied Science and Engineering Technology 10, no. 8 (August 31, 2022): 1894–97. http://dx.doi.org/10.22214/ijraset.2022.46530.

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Abstract: Fibre is a long, thin strand or thread of material made by weaving or knitting threads together. Fibre is a hair like strand of material. A fibre is the smallest visible unit of any textile product. Fibres are flexible and may be spun into yarn and made into fabric. Natural fibres are taken from animals, vegetables or mineral sources. A few examples of widely used natural fibres include animal fibre such as wool and silk vegetables fibres, especially cotton and flax and asbestos, a mineral. Natural fibers are more important part in our human environment. Natural fibers are ecofriendly and inexpensive which are readily available in nature. In this chapter we discuss about the overview of natural fiber and their characteristic. this paper also deals with the impact of natural fibers over the synthetic fibers and also the application of natural fiber in various fields.

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Wang, Shengjun, Jiaqi Guo, Yibo Ma, Alan X. Wang, Xianming Kong, and Qian Yu. "Fabrication and Application of SERS-Active Cellulose Fibers Regenerated from Waste Resource." Polymers 13, no. 13 (June 29, 2021): 2142. http://dx.doi.org/10.3390/polym13132142.

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The flexible SERS substrate were prepared base on regenerated cellulose fibers, in which the Au nanoparticles were controllably assembled on fiber through electrostatic interaction. The cellulose fiber was regenerated from waste paper through the dry-jet wet spinning method, an eco-friendly and convenient approach by using ionic liquid. The Au NPs could be controllably distributed on the surface of fiber by adjusting the conditions during the process of assembling. Finite-difference time-domain theoretical simulations verified the intense local electromagnetic fields of plasmonic composites. The flexible SERS fibers show excellent SERS sensitivity and adsorption capability. A typical Raman probe molecule, 4-Mercaptobenzoicacid (4-MBA), was used to verify the SERS cellulose fibers, the sensitivity could achieve to 10−9 M. The flexible SERS fibers were successfully used for identifying dimetridazole (DMZ) from aqueous solution. Furthermore, the flexible SERS fibers were used for detecting DMZ from the surface of fish by simply swabbing process. It is clear that the fabricated plasmonic composite can be applied for the identifying toxins and chemicals.

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Yan, Yurong, Weipei Li, Ruitian Zhu, Chao Lin, and Rudolf Hufenus. "Flexible Phase Change Material Fiber: A Simple Route to Thermal Energy Control Textiles." Materials 14, no. 2 (January 15, 2021): 401. http://dx.doi.org/10.3390/ma14020401.

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A flexible hollow polypropylene (PP) fiber was filled with the phase change material (PCM) polyethylene glycol 1000 (PEG1000), using a micro-fluidic filling technology. The fiber’s latent heat storage and release, thermal reversibility, mechanical properties, and phase change behavior as a function of fiber drawing, were characterized. Differential scanning calorimetry (DSC) results showed that both enthalpies of melting and solidification of the PCM encased within the PP fiber were scarcely influenced by the constraint, compared to unconfined PEG1000. The maximum filling ratio of PEG1000 within the tubular PP filament was ~83 wt.%, and the encapsulation efficiencies and heat loss percentages were 96.7% and 7.65% for as-spun fibers and 93.7% and 1.53% for post-drawn fibers, respectively. Weak adherence of PEG on the inner surface of the PP fibers favored bubble formation and aggregating at the core–sheath interface, which led to different crystallization behavior of PEG1000 at the interface and in the PCM matrix. The thermal stability of PEG was unaffected by the PP encasing; only the decomposition temperature, corresponding to 50% weight loss of PEG1000 inside the PP fiber, was a little higher compared to that of pure PEG1000. Cycling heating and cooling tests proved the reversibility of latent heat release and storage properties, and the reliability of the PCM fiber.

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Jia, Xian-Sheng, Cheng-Chun Tang, Xu Yan, Gui-Feng Yu, Jin-Tao Li, Hong-Di Zhang, Jun-Jie Li, Chang-Zhi Gu, and Yun-Ze Long. "Flexible Polyaniline/Poly(methyl methacrylate) Composite FibersviaElectrospinning and In Situ Polymerization for Ammonia Gas Sensing and Strain Sensing." Journal of Nanomaterials 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/9102828.

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Conducting polyaniline (PANI) was in situ polymerized at the surface of electrospun poly(methyl methacrylate) (PMMA) fibers to obtain flexible composite fibers. The electrical conductivity of an individual PANI/PMMA composite fiber was estimated to be 2.0 × 10−1 S cm−1at room temperature. The ammonia sensing properties of the samples were tested by impedance analysis. The PANI/PMMA fibers could obviously respond to low concentration of ammonia at ppb level and could respond to relatively high concentration of ammonia at 10 ppm level quickly. In addition, the sensitivity exhibited a good linear relationship to the ammonia concentration. Particularly, the flexible PANI/PMMA fibers showed a reversible change in electrical resistance with repeated cycles of bending and relaxing, and the electrical resistance decreased with the increase of curvature. These results indicate that the flexible PANI/PMMA composite fibers may be used in toxic ammonia gas detection, strain sensing, and flexible electronic devices.

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Babachov, V. G., E. V. Stepanova, A. M. Zimichev, and O. V. Basargin. "OXIDE CONTINUOUS FIBERS AS A PART OF FLEXIBLE HIGH TEMPERATURE INSULATION." Aviation Materials and Technologies, no. 1 (2021): 34–43. http://dx.doi.org/10.18577/2713-0193-2021-0-1-34-43.

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This work is devoted to the production of flexible continuous ceramic fibers based on refractory aluminum and silicon oxides using the Sol-gel method. The processes of transition of water-soluble components of the precursor solution to the oxide form during primary firing of gelified fibers are studied. Structural and phase transformations in fibers under high-temperature heating are examined. The sequence of phase transitions from the amorphous state to the crystal stable phase of α-Al2O3 is shown. The dependence of the mechanical properties of oxide fiber samples on the firing temperature is studied. The conditions for obtaining flexible fibers for textile processing into thrown-twisted heat-resistant yarns are determined. A batch of yarns has been made with additional introduction of organic yarns to protect oxide fibers. The article shows the possibility of manufacturing flexible high-temperature insulation from oxide fibers in the form of a braid for sealing cords and current conductors.

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Podsiadły, Bartłomiej, Piotr Walter, Michał Kamiński, Andrzej Skalski, and Marcin Słoma. "Electrically Conductive Nanocomposite Fibers for Flexible and Structural Electronics." Applied Sciences 12, no. 3 (January 18, 2022): 941. http://dx.doi.org/10.3390/app12030941.

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The following paper presents a simple, low-cost, and repeatable manufacturing process for fabricating conductive, elastic carbon-elastomer nanocomposite fibers for applications in the textile industry and beyond. The presented method allows for the manufacturing of fibers with a diameter of 0.2 mm, containing up to 50 vol. % of graphite powder, 10 vol. % of CNT, and a mix of both fillers. As a result, resistivity below 0.2 Ωm for the 0.2 mm-diameter fibers was achieved. Additionally, conductive fibers are highly elastic, which makes them suitable for use in the textile industry as an element of circuits. The effect of strain on the change in resistance was also tested. Researches have shown that highly conductive fibers can withstand strain of up to 40%, with resistivity increasing nearly five times compared to the unstretched fiber. This research shows that the developed composites can also be used as strain sensors in textronic systems. Finally, functional demonstrators were made by directly sewing the developed fibers into a cotton fabric. First, the non-quantitative tests indicate the feasibility of using the composites as conductive fibers to power components in textronic systems and for bending detection.

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Ruiz-Bustos, Rocío, Antonio López-Uceda, María López-Martínez, and Joost Van Duijn. "The Mechanical Performance of Recycled Slate Waste Fiber Composites Based on Unsaturated Polyester Resins." Materials 16, no. 17 (September 2, 2023): 6041. http://dx.doi.org/10.3390/ma16176041.

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In the last few decades, there has been increasing social awareness for environmental conservation, which is driving the development of composite materials based on natural fibers. These new materials have interesting properties that allow for their use in a variety of applications. This study deals with the development of composite materials based on unsaturated polyester resins reinforced with recycled mineral fibers, such as slate fibers obtained from slate production waste, which have similar properties to glass fiber. The mechanical properties of these composites have been determined by tensile and flexural/bending tests. The influence of various variables such as matrix composition (flexible polyester content) and the weight percentage of fiber added to mechanical properties were evaluated. The flexible/rigid polyester content varied from 0 to 40% and the fiber one from 0 to 30 wt%. Composites with ≥20 wt% of slate fiber reinforcement are shown to have tensile (35 MPa) and flexural (57 MPa) strengths that can compete with materials reinforced with artificial fibers.

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Li, Yi, Jun Chen, Xiao Han, Yinghui Li, Ziqiang Zhang, and Yanwen Ma. "Capillarity-Driven Self-Assembly of Silver Nanowires-Coated Fibers for Flexible and Stretchable Conductor." Nano 13, no. 12 (December 2018): 1850146. http://dx.doi.org/10.1142/s1793292018501461.

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The rapid development of smart textiles requires the large-scale fabrication of conductive fibers. In this study, we develop a simple, scalable and low-cost capillary-driven self-assembly method to prepare conductive fibers with uniform morphology, high conductivity and good mechanical strength. Fiber-shaped flexible and stretchable conductors are obtained by coating highly conductive and flexible silver nanowires (Ag NWs) on the surfaces of yarn and PDMS fibers through evaporation-induced flow and capillary-driven self-assembly, which is proven by the in situ optical microscopic observation. The density of Ag NWs and linear resistance of the conductive fibers could be regulated by tuning the assembly cycles. A linear resistance of 1.4[Formula: see text][Formula: see text]/cm could be achieved for the Ag NWs-coated nylon, which increases only 8% after 200 bending cycle, demonstrating high flexibility and mechanical stability. The flexible and stretchable conductive fibers have great potential for the application in wearable devices.

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Shen, Yanan, Chunyang Wang, Xiao Yang, Jian Li, Rui Lu, Ruiyi Li, Lixin Zhang, Haisheng Chen, Xinghua Zheng, and Ting Zhang. "New Progress on Fiber-Based Thermoelectric Materials: Performance, Device Structures and Applications." Materials 14, no. 21 (October 22, 2021): 6306. http://dx.doi.org/10.3390/ma14216306.

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With the rapid development of wearable electronics, looking for flexible and wearable generators as their self-power systems has proved an extensive task. Fiber-based thermoelectric generators (FTEGs) are promising candidates for these self-powered systems that collect energy from the surrounding environment or human body to sustain wearable electronics. In this work, we overview performances and device structures of state-of-the-art fiber-based thermoelectric materials, including inorganic fibers (e.g., carbon fibers, oxide fibers, and semiconductor fibers), organic fibers, and hybrid fibers. Moreover, potential applications for related thermoelectric devices are discussed, and future developments in fiber-based thermoelectric materials are also briefly expected.

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Yang, Qiuyan, Zhen Xu, Bo Fang, Tieqi Huang, Shengying Cai, Hao Chen, Yingjun Liu, Karthikeyan Gopalsamy, Weiwei Gao, and Chao Gao. "MXene/graphene hybrid fibers for high performance flexible supercapacitors." J. Mater. Chem. A 5, no. 42 (2017): 22113–19. http://dx.doi.org/10.1039/c7ta07999k.

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Дисертації з теми "Flexible fibers"

Daieff, Marine. "Deformation and shape of flexible, microscale helices in viscous flows." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC189/document.

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Les interactions fluide-structure sont d'un grand intérêt en ingénierie et pour des applications industrielles et médicales. Comprendre les interactions entre des particules aux formes complexes et des écoulements peut mener à de nouveaux projets pour l'administration ciblée de médicaments, pour des micro capteurs de débit et à une meilleure compréhension du comportement des micro-organismes. Dans cette thèse, nous étudions l'interaction fluide-structure de particules chirales de taille microscopique à bas nombres de Reynolds. Les particules sont rigides et confinées dans une géométrie 2D ou flexibles avec une forme hélicoïdale. Combiner des techniques de microfabrication, comme des méthodes d'assemblage multi-échelles et la microfluidique, permet d'avoir un excellent contrôle à la fois sur les propriétés géométriques et mécaniques des fibres et aussi sur les caractéristiques de l'écoulement comme ses propriétés Newtoniennes et non Newtoniennes, sa vitesse et sa géométrie. Dans un premier temps, nous avons étudié des fibres rigides, 2D et asymétriques, i.e. des fibres en L. Les confinements latéral et transversal ont été étudiés tout comme la forme de la fibre. Lorsque la particule est transportée dans un écoulement visqueux, elle tourne jusqu'à atteindre une orientation d'équilibre. Dans cette orientation particulière, la fibre se décale vers les murs latéraux du canal. Une étude complète des trajectoires de la fibre a été réalisée et des comparaisons avec des particules symétriques ont été faites. Ce sujet de recherche pourrait aider à concevoir des dispositifs pour trier des particules à des fins médicales. Dans un second temps, nous avons étudié des fibres hélicoïdales flexibles de taille micrométrique. La dynamique de formation de l'hélice a été analysée. Les hélices se forment à partir de rubans droits 2D qui, de façon spontanée, s'enroulent quand ils sont libérés dans l'eau. La forme hélicoïdale est obtenue seulement quelques minutes après la libération des rubans mais l'hélice continue à rétrécir pendant plusieurs heures jusqu'à ce qu'elle atteigne une courbure préférentielle. Deux temps caractéristiques sont identifiés dans cette dynamique de formation. Un modèle a été développé pour comprendre le complexe équilibre entre les forces élastiques, de tension de surface et visqueuses aux temps courts. Après avoir analysé plusieurs hypothèses, comme l'impact d'une couche sacrificielle, une possible modification du module du matériau et la présence de fluage, l'évolution du rayon de l'hélice aux temps longs s'explique probablement par du fluage. La dynamique d'extension et de relaxation de la fibre flexible a aussi été étudiée dans des fluides Newtonien et non Newtonien. L'étude dans des solutions de polymères est pertinente et intéressante car la taille des micro hélices est comparable à celle des flagelles des micro-organismes et à celle de chaînes de polymères de grande masse moléculaire. Il s'agit donc d'un problème mutli-échelles complexe car la viscosité locale au niveau du ruban pourrait être différente de la viscosité globale de l'écoulement
Fluid-structure interactions are of wide interest in engineering, industrial and medical applications. Understanding the interactions between complex shaped particles and flows might lead to new designs for targeted delivery, microflow sensors and to a better understanding of the behavior of microorganisms. In this thesis, we study the fluid-structure interaction of microscale chiral particles at low Reynolds numbers. The particles are rigid and confined in a 2D geometry or flexible with a helical shape. The combination of microfabrication techniques, such as multiscale assembly methods and microfluidics, enables to have a perfect control on both the geometrical and mechanical properties of the fibers and the flow features such as Newtonian or non Newtonian properties, the flow velocity and the flow geometry. First we studied asymmetric 2D rigid fibers, i.e. L-shaped fibers. Both lateral and transversal confinements have been investigated, as well as the shape of the fiber. When the particle is transported in viscous flows, it rotates until reaching an equilibrium orientation. In this specific orientation, the fiber drifts towards the lateral walls of the channel. A full investigation on the trajectories of the fiber has been performed and comparisons with symmetric particles have been done. Such research may help design devices to sort particles for medical purposes. Secondly we studied flexible microscale helical fibers. The dynamics of the helix formation has been investigated. The helices are formed from straight 2D ribbons, which spontaneously coil when released in water. The helical shape is reached only several minutes after the release but the helix keeps shrinking during several hours until reaching a preferred curvature. Two different timescales are identified in this formation dynamics. A model has been developed to understand the complex balance between elastic, surface tension and viscous forces at short times. After investigating several assumptions such as the impact of a sacrificial layer, a possible change in the modulus of the material and a creep behavior, the evolution of the radius at long times is most likely explained by creep. The extension and relaxation dynamics of the flexible fiber has also been studied in Newtonian and non Newtonian fluids. The study in polymer solutions is relevant and interesting because the size of the microhelix is comparable to the flagella of microorganisms and to the chains of high molecular weight polymers. Complex multiscale problems are then involved as the local viscosity at the scale of the ribbon might differ from the global viscosity at the scale of the flow

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Ybañez, y. Valeros Numer. "The crack bridging behavior of flexible fibers." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11817.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
Includes bibliographical references (leaves 162-165).
by Numer Ybañez y Valeros.
M.S.

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Marheineke, Nicole [Verfasser]. "Turbulent Fibers : On the Motion of Long, Flexible Fibers in Turbulent Flows / Nicole Marheineke." Aachen : Shaker, 2005. http://d-nb.info/1186577657/34.

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Lu, Chi Ph D. Massachusetts Institute of Technology. "Flexible fibers for optoelectronic probing of spinal cord circuits." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111328.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 117-128).
The majority of the neural engineering efforts in the past decade have focused on brain interfaces. The searching of tools for recording and modulation of neural activity in the spinal cord limits fundamental understanding of neural dynamics in this organ. Spinal cord poses a challenge to probe design due to its fibrous structure, repeated deformation, low elastic modulus, and sensitivity to implantation procedures. This work addresses the elastic modulus mismatch between spinal cord tissue and synthetic devices by designing flexible multifunctional neural probes capable of conforming to the spinal cord geometry and mechanical properties, while providing functions for optical stimulation and neural recording. In this thesis, fiber drawing techniques are applied to produce flexible and stretchable probes. The utility of the devices for recording and optical stimulation is demonstrated in the spinal cord of transgenic mice expressing the light sensitive protein channelrhodopsin 2 (ChR2). Furthermore, it is shown that the optical stimulation of the spinal cord with the polymer fiber probes induces on-demand limb movements. Finally, the modest dimensions and high flexibility of the devices permitting chronic implantation into the mouse spinal cord with minimal damage to the neural tissue are demonstrated. The findings of this thesis are anticipated to aid the studies of the spinal cord circuits and pave way to new directions in flexible fiber-based optoelectronic devices.
by Chi Lu.
Ph. D.

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Makanga, Ursy. "Transport and deformation of flexible fibers in structured environments." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAX080.

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Les fibres flexibles se rencontrent dans diverses situations dans la nature et les applications industrielles. Parmi lesquelles on trouve des fibres de microplastiques, des fibres de cellulose et des structures filamenteuses résultant de colonies bactériennes dites “biofilms". Dans la plupart des cas, les fibres flexibles sont généralement immergées dans des environnements fluidiques qui sont munis d'obstacles. A titre d'exemple, les lave-linge rejettent un grand nombre de fibres de microplastiques (environ 1900 fibres par lavage) dans des eaux usées contenant plusieurs débris. Dans de tels environnements complexes, les fibres peuvent adopter différentes formes non triviales et se déplacer suivant différents modes à travers les obstacles environnants. Ces différents comportements résultent du couplage complexe entre la réponse élastique des fibres, les collisions et les interactions hydrodynamiques. Leur compréhension est par conséquent essentielle pour l'étude des systèmes biologiques, environnementaux et industriels, où des phénomènes similaires sont observés, de même que pour éviter des problèmes majeurs comme la pollution ou le colmatage. Au cours des dernières décennies, la modélisation des particules élancées immergées dans un fluide visqueux a été un domaine majeur de recherche en mécanique des fluides. Cependant, le développement des modèles numériques permettant de prendre en compte des environnements munis d'obstacles a été peu abordé. Le problème raide à résoudre sous contraintes qui en résulte en est une des raisons. Modéliser des fibres dans de tels environnements est un défi majeur pour les approches numériques actuelles.Ainsi, dans cette thèse, nous proposerons une méthodologie pour simuler des fibres flexibles dans des environnements fluidiques munis d'obstacles. Notre implémentation permet de simuler des systèmes contenant un nombre considérable de fibres et d'obstacles en des temps raisonnables sur une seule carte graphique (GPU). Forts de cet outil, et d'expériences simples, nous étudierons ensuite le problème de sédimentation des fibres flexibles dans des environnements complexes. Nos résultats jettent les bases pour de futures expériences et fournissent des ingrédients physiques essentiels pour la conception des dispositifs de tri de particules sous l'action de la gravité
Flexible fibers are encountered in various situations in nature and industrial applications. Examples include microplastics fibers, cellulose fibers, and biofilm streamers. In a wide range of such situations, flexible fibers are often immersed in a fluidic environment with obstacles embedded. For instance, laundry washing machines discharge a large number of microplastics fibers (around 1900 fibers per wash) into wastewaters which contain a significant amount of debris. In such complex media, flexible fibers can exhibit nontrivial conformations and different modes of transport through the surrounding obstacles. These dynamics result from the complex interplay between their elastic response, collisions and hydrodynamic interactions. Understanding of these phenomena is therefore essential to study the physics of biological, environmental and industrial systems, but also to prevent issues such as pollution or clogging. While modeling slender particles in viscous fluids has been a major area of research over the past few decades, methodologies involving surrounding environments are scarce. The resulting complex coupling leads to a constrained formulation of the problem in addition of being stiff. Therefore, modeling fibers in complex media is challenging and can be computationally costly.In this thesis, we will propose a methodology to model flexible fibers in different environments that are made of rigid stationary obstacles. Our implementation enables dynamic simulations of large systems in a reasonable wall times on a single modern Graphics Processing Unit (GPU). Using the capabilities afforded by our method, together with simple experiments, we will investigate the sedimentation of flexible fibers in structured environments. The resulting findings provide physical insight into future experiments and the design of gravity-based sorting devices

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Rezak, Sheila. "Analysis of flexible fiber suspensions using the Lattice Boltzmann method." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24798.

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Thesis (Ph.D.)--Mechanical Engineering, Georgia Institute of Technology, 2009.
Committee Co-Chair: Aidun, K. Cyrus; Committee Co-Chair: Ghiaasiaan, Mostafa; Committee Member: Deng, Yulin; Committee Member: Empie, Jeff; Committee Member: Patterson, Tim.

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Hofmann, John. "Extension of the Method of Ellipses to Determining the Orientation of Long, Semi-flexible Fibers in Model 2- and 3-dimensional Geometries." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23921.

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The use of fiber-reinforced polymer composites formed via injection molding is of increasing interest due to their superior mechanical properties as compared to those of the polymer matrix alone. These mechanical properties, however, are strongly dependent on the fiber length and orientation distributions within a molded part. As such, there is a need to understand and model the orientation evolution of chopped fibers in flow in order to accurately simulate the final fiber orientation distribution within injection molded parts. As a result of this, accurate and reliable experimental measurement of fiber orientation is needed. Within this research, the application and validity of the Method of Ellipses for determining the orientation of long, semi-flexible glass fibers within injection molded composites has been investigated. A fiber suspension with an average length of approximately 3.9 mm was the focus of this study and assumed to be representative of commercial distributions. A novel method to quantify fiber curvature was developed and utilized to show that flexibility in center-gated disc and the end-gated plaque samples was minimal on average for the selected fiber length distribution. Thus, it was determined that the Method of Ellipses was applicable when utilized to obtain reliable orientation data for the selected long glass fiber suspension and within the chosen geometries that exhibit 1-, 2-, and 3-dimensional velocity fields. However, a modified image analysis width was found to be necessary in regions of highly aligned fibers, due to the increase in ellipse size and the need to reduce the number of partial objects and thus minimize error. This allowed for a direct comparison of the experimental orientation behavior of short and long glass fibers within the center-gated disc and the end-gated plaque, as well as the effect of the orientation distributions on the global modulus of the part.
Ph. D.

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Reichard, Karl Martin. "Distributed-effect modal domain optical fiber senors for flexible structure control." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39420.

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Zhao, Wei. "Flexible Transparent Electrically Conductive Polymer Films for Future Electronics." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1297888558.

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Chang, Sheau-Miin. "Critical evaluation of strong organic fibers vis-a-vis mechanical performance in flexible structures." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/8479.

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Книги з теми "Flexible fibers"

Pen, Wang Ko, Mehta Atul C, and Turner J. Francis, eds. Flexible bronchoscopy. 2nd ed. Malden, Mass: Blackwell Pub., 2004.

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International Cargo Handling Co-ordination Association., ed. Safe use of flexible intermediate bulk containers (FIBCs). London: International Cargo Handling Co-ordination Association, 1996.

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Brydon, A. G. Flexible card clothing and its application. Manchester: Textile Institute, 1988.

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Melashvili, Yuri. Controlled structures with electromechanical and fiber-optical sensors. Hauppauge, NY, USA: Nova Science Publishers, 2008.

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Dahl, Milo D. Effects of fiber motion on the acoustic behavior of an anisotropic, flexible fibrous material. [Washington, DC: National Aeronautics and Space Administration, 1987.

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1943-, Murry Thomas, ed. FEESST: Flexible endoscopic evaluation of swallowing with sensory testing. San Diego: Plural Pub., 2005.

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Galperin, Inna. A numerical model of the motion of a curved flexible fibre in a shear flow. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1999.

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Turner, Roderick David. Dual wavelength fiber-optic polarimeter for path-integrated strain sensing: application to the measurement of local slope on a flexible beam. [Downsview, Ontario]: University of Toronto, Institute for Aerospace Studies, 1991.

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Turner, Roderick David. Dual wavelength fiber-optic polarimeter for path-integrated strain sensing: application to the measurement of local slope on a flexible beam. [Downsview, Ont.]: University of Toronto, Institute for Aerospace Studies, 1990.

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Keller, Thomas. Use of fibre reinforced polymers in bridge construction. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2003. http://dx.doi.org/10.2749/sed007.

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The aim of the present Structural Engineering Document, a state-of-the-art report, is to review the progress made worldwide in the use of fibre reinforced polymers as structural components in bridges until the end of the year 2000. Due to their advantageous material properties such as high specific strength, a large tolerance for frost and de-icing salts and, furthermore, short installation times with minimum traffic interference, fibre reinforced polymers have matured to become valuable alternative building materials for bridge structures. Today, fibre reinforced polymers are manufactured industrially to semi-finished products and ccimplete structural components, which can be easily and quickly installed or erected on site. Examples of semi-finished products and structural components available are flexible tension elements, profiles stiff in bending and sandwich panels. As tension elements, especially for the purpose of strengthening, strips and sheets are available, as weil as reinforcing bars for concrete reinforcement and prestressing members for internal prestressing or external use. Profiles are available for beams and columns, and sandwich constructions especially for bridge decks. During the manufacture of the structural components fibre-optic sensors for continuous monitoring can be integrated in the materials. Adhesives are being used more and more for joining components. Fibre reinforced polymers have been used in bridge construction since the mid-1980s, mostly for the strengthening of existing structures, and increasingly since the mid-1990s as pilot projects for new structures. In the case of new structures, three basic types of applications can be distinguished: concrete reinforcement, new hybrid structures in combination with traditional construction materials, and all-composite applications, in which the new materials are used exclusively. This Structural Engineering Document also includes application and research recommendations with particular reference to Switzerland. This book is aimed at both students and practising engineers, working in the field of fibre reinforced polymers, bridge design, construction, repair and strengthening.

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Частини книг з теми "Flexible fibers"

Huang, YongAn, YeWang Su, and Shan Jiang. "Self-Assembly of Self-Similar Fibers for Stretchable Electronics." In Flexible Electronics, 257–87. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6623-1_10.

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Salem, David R. "Draw-Induced Structure Development in Flexible-Chain Polymers." In Structure Formation in Polymeric Fibers, 118–84. München: Carl Hanser Verlag GmbH & Co. KG, 2001. http://dx.doi.org/10.3139/9783446456808.004.

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Knudsen, Bodo E. "Flexible Ureteroscopy: Holmium:YAG Laser and Optical Fibers." In Ureteroscopy, 161–67. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-62703-206-3_14.

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Fukushima, Yasunori, Hiroki Murase, and Yasuo Ohta. "Dyneema®: Super Fiber Produced by the Gel Spinning of a Flexible Polymer." In High-Performance and Specialty Fibers, 109–32. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-55203-1_7.

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Rath, Jan-Erik, Robert Graupner, and Thorsten Schüppstuhl. "Die-Less Forming of Fiber-Reinforced Plastic Composites." In Lecture Notes in Mechanical Engineering, 3–14. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18326-3_1.

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AbstractFiber-reinforced plastics (FRP) are increasingly popular in light weight applications such as aircraft manufacturing. However, most production processes of thin-walled FRP parts to date involve the use of expensive forming tools. This especially hinders cost-effective production of small series as well as individual parts and prototypes. In this paper, we develop new possible alternatives of highly automated and die-less production processes based on a short review of current approaches on flexible thin-walled FRP production. All proposed processes involve robot guided standard tools, similar to incremental sheet metal forming, for local forming of the base materials. These include woven glass fiber fabrics which are locally impregnated with thermoset resin and cured using UV-light, woven commingled yarns made out of glass fibers and thermoplastic fibers which are locally heated and pressed, as well as pre-consolidated thermoplastic organo sheets which require selective heating for forming. General applicability of the processes is investigated and validated in practical experiments.

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Xiang, Dong. "Flexible Strain Sensors Based on Elastic Fibers of Conductive Polymer Composites." In Carbon-Based Conductive Polymer Composites, 113–25. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003218661-6.

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Takahashi, Yasuo, Junichi Kawashima, Yasuji Yamada, Kaname Matsumoto, and Izumi Hirabayashi. "YBa2Cu3O7-δSuperconductors Coated by LPE Process on Flexible YSZ Fibers and Polycrystalline Tapes." In Advances in Superconductivity X, 627–30. Tokyo: Springer Japan, 1998. http://dx.doi.org/10.1007/978-4-431-66879-4_147.

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Zhang, Ye, Lie Wang, Yang Zhao, and Huisheng Peng. "Flexible Fiber Lithium-Ion Batteries." In Flexible Batteries, 39–59. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003273677-3.

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Huang, YongAn, YeWang Su, and Shan Jiang. "Buckling of Fiber-on-Substrate System in Flexible Electronics." In Flexible Electronics, 57–84. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6623-1_3.

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De Joliniere, J. Bouquet, J. B. Dubuisson, B. Tessier, and M. Levardon. "Flexible Fiber in Gynecology." In Lasers in Gynecology, 271–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-45683-1_41.

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Тези доповідей конференцій з теми "Flexible fibers"

Uber, Gordon T. "Flexible object-centered illuminator." In Fibers '91, Boston, MA, edited by Donald J. Svetkoff, Kevin G. Harding, Gordon T. Uber, and Norman Wittels. SPIE, 1991. http://dx.doi.org/10.1117/12.25341.

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Levy, Michael. "Hollow flexible IR fibers." In OE/LASE '92, edited by Abraham Katzir. SPIE, 1992. http://dx.doi.org/10.1117/12.60245.

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MELROSE, JOHN R., ZEMIN NING, and JANETTE JONES. "SIMULATION OF FLEXIBLE FIBERS." In Proceedings of the Fifth Royal Society–Unilever Indo-UK Forum in Materials Science and Engineering. A CO-PUBLICATION OF IMPERIAL COLLEGE PRESS AND THE ROYAL SOCIETY, 2000. http://dx.doi.org/10.1142/9781848160163_0021.

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Miller, M. S., K. A. Murphy, A. M. Vengsarkar, and R. O. Claus. "Fiber Optic Shape Sensing For Flexible Structures." In OE/FIBERS '89, edited by Eric Udd. SPIE, 1990. http://dx.doi.org/10.1117/12.963115.

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Jaworski, Justin. "Hydroelastic motions of flexible fibers." In 2018 AIAA/CEAS Aeroacoustics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-3786.

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Chen, Hongyu, Peter Wapperom, and Donald G. Baird. "Simulation of Long Semi-Flexible Fiber Orientation During Injection Molding." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8577.

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Fiber orientation simulation is conducted for the Center-Gated-Disk (CGD) geometry and compared with experimental data. Long-fiber thermoplastic composites (LFTs) possess competitive advantages over short glass fiber composites in terms of their mechanical properties while retain the ability to be injection molded. Mechanical properties of LFTs are highly dependent on the microstructural variables imparted by the injection molding process including fiber orientation and fiber length distribution. As the fiber length increased, the mechanical properties of the composites containing discontinuous fibers can approach those of continuous fiber materials. Several researchers have reported that flexural, creep and charpy impact properties increase as fiber length increases, while tensile modulus will plateau for glass fibers above 1 mm in length. Fibers less than the 1 mm threshold have been considered to be short while fibers with lengths greater than 1 mm are considered long. For long fibers, they will have the ability to deform, bend and even break during any stage of polymer processing. There is a lack of knowledge about the effects of fiber length and fiber length variation on fiber orientation kinetics. This lack of information provides an opportunity to understand the length effect inherent to long fibers systems. The Bead-Rod fiber orientation model takes into account the flexibility of semi-flexible fibers that show small bending angles. In this model, a flexibility parameter representing the resistive bending potential is fiber length dependent (detailed explanation can be found in the reference)1. This work is concerned with the effect of fiber length on the performance of the Bead-Rod fiber orientation model which takes into account the flexibility of semi-flexible fibers. Different averaging techniques are used to represent the average fiber length for the population of fibers, which give different fiber length parameters for the Bead-Rod model. The sensitivity of the Bead-Rod model is evaluated with regard to the fiber flexibility parameter, k, and length parameter, lb. The other phenomenal parameters within the orientation model are obtained via basic rheological measurements using simple shear flow. As the value of average fiber length Lav increases and the corresponding flexibility parameter value decreases, the core regions become wider and the flow direction orientation gradually decreases especially near the walls for the Bead-Rod model predictions. In addition, as the parameters favor longer fiber lengths, the predicted extent of fiber bending increases. The simulation results are also compared with the experimental obtained fiber orientation at different flow length along the thickness direction. The Bead-Rod model shows improvement over the rigid rod model.

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Nguyen, Luong A., Ian D. Walker, and Rui J. P. de Figueiredo. "Control of flexible, kinematically redundant robot manipulators." In Fibers '91, Boston, MA, edited by Rui J. P. de Figueiredo and William E. Stoney. SPIE, 1991. http://dx.doi.org/10.1117/12.25434.

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Wang, Ranran, Yin Cheng, and Jing Sun. "Smart Fibers Based on Low Dimensional Conductive Materials." In 2018 International Flexible Electronics Technology Conference (IFETC). IEEE, 2018. http://dx.doi.org/10.1109/ifetc.2018.8583915.

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Qu, Yunpeng, Tung Nguyen-Dang, Alexis Gerald Page, Wei Yan, Tapajyoti Das Gupta, Gelu Marius Rotaru, Rene M. Rossi, Valentine Dominique Favrod, Nicola Bartolomei, and Fabien Sorin. "Stretchable Optical and Electronic Fibers via Thermal Drawing." In 2018 International Flexible Electronics Technology Conference (IFETC). IEEE, 2018. http://dx.doi.org/10.1109/ifetc.2018.8583875.

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Chow, Desmond M., D. C. Tee, S. R. Sandoghchi, and F. R. Mahamd Adikan. "Direct UV Written Waveguide’s Dispersion in Flexible Silica Flat Fibre Chip." In Specialty Optical Fibers. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/sof.2012.sm2e.4.

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Звіти організацій з теми "Flexible fibers"

McKeehan, K. Composite molding of SPECTRA{reg_sign} extended chain polyethylene fibers in a flexible rubber matrix. Office of Scientific and Technical Information (OSTI), August 1997. http://dx.doi.org/10.2172/653949.

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Siebenaler, Shane. PR-015-163766-R01 Field Testing of Distributed Acoustic Sensing Systems. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2018. http://dx.doi.org/10.55274/r0011503.

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Distributed acoustic sensing (DAS) technology utilizes a fiber-optic cable as a distributed vibration sensor that can be installed in a right-of-way to monitor for pipeline leaks and to identify third-party interference (TPI), such as mechanized excavation, hand digging, etc. Various laboratory tests have been performed to demonstrate that DAS has the potential to be a flexible solution for pipeline operators. A key gap that needs to be assessed is the ability of the technology to serve its intended leak detection and TPI functions while not generating alarms at any other times. The most comprehensive means of performing such an evaluation is through an actual field demonstration of DAS technology on an operational pipeline. This report documents a ten-week-long test of four commercially available DAS technologies on an operational pipeline. The pipeline segment is 25-kilometers in length, and the systems were configured to autonomously alarm to leaks and mechanical digging. This research demonstrates the real-world performance of such systems and provides qualitative information in regards to the operational requirements for sustained deployment of DAS technology. This document has a related webinar. (member login required)

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AN ANALYTICAL METHOD FOR EVALUATING THE DEFLECTION AND LOAD-BEARING AND ENERGY ABSORPTION CAPACITY OF ROCKFALL RING NETS CONSIDERING MULTIFACTOR INFLUENCE. The Hong Kong Institute of Steel Construction, September 2022. http://dx.doi.org/10.18057/ijasc.2022.18.3.1.

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In this study, an analytical method for evaluating the structural performance, including maximum deflection, load-bearing, and energy absorption capacity of a steel wire-ring net, was proposed to effectively design the ring net of the flexible barrier systems. Puncture tests of the ring nets and two-point traction tests of the three-ring chains with various wire-ring specifications were conducted. Correlation analysis was used to test the results between ring nets and chains, revealing that three structural performance indicators of the test specimens were strongly related. The ring net’s structural performance was affected specifically by ring chains on the shortest load transfer path. Accordingly, a three-ring chain with a flexible boundary corresponded to a fibre–spring element. A three-dimensional analytical model of the ring net was established. Explicit formulas for computing the three indicators of the ring net were derived. Comprehensive quasi-static and impact tests, using different shapes and sizes of punching devices, were conducted, providing valuable data to calibrate and validate this analytical method. The ability of the model in yielding consistent results when implemented at the structure scale was then assessed, based on the data of full-scale impact tests on a 1500kJ-energy rockfall barrier. Lastly, the effects of various factors, such as single ring geometry, the length–width ratio of the net, loading area size, boundary stiffness, and load rate, influencing the structural performance indicators of the ring net were investigated, respectively.

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