Relevant bibliographies by topics / Fibre fabrication

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Fibre fabrication'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Fibre fabrication"

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Ahmed, Mansur, Md Saiful Islam, Qumrul Ahsan, and Md Mainul Islam. "Fabrication and Characterization of Unidirectional Silk Fibre Composites." Key Engineering Materials 471-472 (February 2011): 20–25. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.20.

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Natural fibres offer a number of benefits as reinforcement for synthetic polymers since they have high specific strength and stiffness, high impact strength, biodegradability etc. The aim of this study is to fabricate and determine the performance of unidirectional silk fibre reinforced polymer composites. In the present initial study, alkali treated silk fibres were incorporated as reinforcing agent, while a mixture of 20% maleic anhydride grafted polypropylene (MAPP) and commercial grade polypropylene (PP) was used as matrix element. The unidirectional composites were fabricated by using hot compression machine under specific pressure, temperature and varying fibre loading. Tensile, flexural, impact and hardness tests were carried out by varying silk fibre volume fraction. Composites containing 45% fibre volume fraction had higher tensile and flexural strength, Young’s modulus and flexural modulus compared to other fabricated composites including those with untreated silk fibres. SEM micrographs were taken to examine composite fracture surface and interfacial adhesion between silk fibre and the matrix. These micrographs suggested less fibre pull out and better interfacial bonding for 40% fibre reinforced composites.
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Lehrecke, August, Cody Tucker, Xiliu Yang, Piotr Baszynski, and Hanaa Dahy. "Tailored Lace: Moldless Fabrication of 3D Bio-Composite Structures through an Integrative Design and Fabrication Process." Applied Sciences 11, no. 22 (November 19, 2021): 10989. http://dx.doi.org/10.3390/app112210989.

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This research demonstrates an integrative computational design and fabrication workflow for the production of surface-active fibre composites, which uses natural fibres, revitalises a traditional craft, and avoids the use of costly molds. Fibre-reinforced polymers (FRPs) are highly tunable building materials, which gain efficiency from fabrication techniques enabling controlled fibre direction and placement in tune with load-bearing requirements. These techniques have evolved closely with industrial textile processes. However, increased focus on automation within FRP fabrication processes have overlooked potential key benefits presented by some lesser-known traditional techniques of fibre arrangement. This research explores the process of traditional bobbin lace-making and applies it in a computer-aided design and fabrication process of a small-scale structural demonstrator in the form of a chair. The research exposes qualities that can expand the design space of FRPs, as well as speculates about the potential automation of the process. In addition, Natural Fibre-Reinforced Polymers (NFRP) are investigated as a sustainable and human-friendly alternative to more popular carbon and glass FRPs.
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Kulhan, Taniya, Arun Kamboj, Nitin Kumar Gupta, and Nalin Somani. "Fabrication methods of glass fibre composites—a review." Functional Composites and Structures 4, no. 2 (April 21, 2022): 022001. http://dx.doi.org/10.1088/2631-6331/ac6411.

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Abstract The use of polymer composite has been implemented since 3400 B.C, the very first known composite’s application is attributed to the Mesopotamians. These ancient people fabricated plywood with glued wood strips placed at various distinct angles and in the late 1930s glass fiber thin strands have been developed. Glass fibre polymer composites have a wide scope in various engineering structures submarines, spacecraft, airplanes, automobiles, sports, and many more, over traditional materials because of their superior properties including lightweight, high fracture toughness, corrosion, fatigue, wear & fire resistance, high strength to weight ratio, high modulus and low coefficient of expansion. Various technologies have been developed so far to create different types of polymer composites in accordance with their properties and applications. Glass fiber possesses better properties as great strength, better flexibility, stiffness, and chemical corrosion resistance. Glass fibers are generally in the form of cut-up strand, fabrics and mats. Every kind of glass fibers has different properties and has various applications as in polymer composites. The aim of this review paper is to provide updated technological insights regarding the evolution of composite, classification of gass fibre polymer composites, development methodology in contrast with various applications, advantages and limitations and their behavioral properties.
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Rohit, Ram, Linford Pinto, K. Mallikharjuna Babu, Martin Jebraj, and Harsha R. Gudi. "Fabrication and Comparison of Mechanical Properties of Jute and Glass Fibre Reinforced Composites." Applied Mechanics and Materials 592-594 (July 2014): 344–48. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.344.

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The properties of fiber reinforced composites (FRP) like high strength to weight ratio, high stiffness to weight ratio, flexibility in design, ease of fabrication with economical savings as compared to metal alloys, make it an excellent choice for various range of products from building materials, sporting equipment, appliances, automotive parts, boats, canoe hulls to bodies for recreational vehicles. In this study the properties of natural fibre composite are compared with composite made of artificial fibres. The natural fibre chosen is jute fibre and the artificial fibre chosen is glass fiber. Polyester resin was the matrix used because of compatibility, cost effectiveness and easy availability. The composites were fabricated by Hand Layup technique and the number of layers of composite laminate was varied as three, four and five. The specimens were subjected to mechanical tests and Young’s Modulus, Ultimate Strength were evaluated. Modal analysis was carried out to determine the damping characteristics through damping ratio. A comparison of the two composites in terms of mechanical properties is made and the results are tabulated.
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Blok, Lourens, Marco Longana, and Benjamin Woods. "Fabrication and Characterisation of Aligned Discontinuous Carbon Fibre Reinforced Thermoplastics as Feedstock Material for Fused Filament Fabrication." Materials 13, no. 20 (October 20, 2020): 4671. http://dx.doi.org/10.3390/ma13204671.

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In this work, aligned discontinuous fibre composite (ADFRC) tapes were developed and investigated as precursors for a novel 3D printing filament. ADFRCs have the potential to achieve mechanical performance comparable to continuous fibre reinforced composites, given sufficient fibre length and high level of alignment, and avoid many of the manufacturing difficulties associated with continuous fibres, e.g., wrinkling, bridging and corner radii constraints. Their potential use for fused filament fabrication (FFF) techniques was investigated here. An extensive down-selection process of thermoplastic matrices was performed, as matrix properties significantly impact both the processing and performance of the filament. This resulted in four candidate polymers (ABS, PLA, Nylon, PETG) which were used to manufacture ADFRC tapes with a Vf of 12.5% using the high performance discontinuous fibre (HiPerDiF) technology and an in-house developed continuous consolidation module. Tensile stiffness and strength up to 30 GPa and 400 MPa respectively were recorded, showing that a discontinuous fibre filament has the potential to compete with continuous fibre filaments.
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Vigneshwaran, G. Veerakumar, Iyyadurai Jenish, and Rajeshwaran Sivasubramanian. "Design, Fabrication and Experimental Analysis of Pandanus Fibre Reinforced Polyester Composite." Advanced Materials Research 984-985 (July 2014): 253–56. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.253.

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Due to the light weight, high strength to weight ratio, corrosion resistance and other advantages, natural fibre based composites are becoming important composite materials in mechanical engineering fields. The current project emphasizes the newly identified Pandanus Fibre (Pandanus Fascicularis) which is extracted from the stem of screw pine tree by the manual water treatment process. The mechanical properties of chopped Pandanus fibre by Polyester composites are investigated and compared with the similar natural fibres in the fibre reinforced composite material field. The composite plates were fabricated with raw pandanus fibres by compression moulding method with varying weight percentage and lengths of fibre.
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Glöckler, Felix, Florian Hausladen, Igor Alekseenko, Alexander Gröger, Giancarlo Pedrini, and Daniel Claus. "Two-photon-polymerization enabled and enhanced multi-channel fibre switch." Engineering Research Express 3, no. 4 (November 11, 2021): 045016. http://dx.doi.org/10.1088/2631-8695/ac34c5.

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Abstract This article discusses the fabrication and performance of a multi-channel fibre switch, consisting of 19 single-mode fibres, with enhanced coupling efficiency due to micro-optics, directly printed via two-photon-polymerization on the end-face of each fibre. The use of high-resolution two-photon-polymerization not only allows the enhancement of the coupling efficiency with respect to the coupling device in use but likewise offers great freedom in the arrangement of the used fibres. This letter gives a thorough explanation of the fabrication method as well as the optical simulations for the lenses on the fibre assembly.
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Nayak, Rajkishore, Rajiv Padhye, Lyndon Arnold, Ilias Louis Kyratzis, Yen Bach Truong, Gary Peeters, Lance Nichols, and Mike O'Shea. "Mechanism of Nanofibre Fabrication by Meltblowing." Applied Mechanics and Materials 217-219 (November 2012): 207–12. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.207.

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Fabrication of nanofibres has become a growing area of research because of their unique properties (i.e. smaller fibre diameter and higher surface area) and potential applications in various fields such as filtration, composites and biomedical applications. The mechanism of nanofibre fabrication by meltblowing process with the injection of different fluids (such as air and water) has been investigated in this paper. In the meltblowing equipment the fluids were injected at a vent port along the extrusion barrel, for the fabrication of nanofibres. The injection of water resulted in better fibre morphology compared to the injection of air. Nanofibres were fabricated by the drafting action of the high-velocity flow of the heated air and the steam in the extruder. The fibres collected were straight prior to the fluid injection and coiled fibres were collected with the injection of fluids. Three types of fibres such as ribbon shaped, fused and branched fibres were obtained in addition to the circular fibres.
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Ram, Dhiwakar S., P. N. Bharath Kumar, R. Sandeep Kumar, and B. Vijaya Ramnath. "Evaluation of Mechanical Properties of Sugarcane Reinforced Hybrid Natural Fibre Composites by Conventional Fabrication and Finite Element Method." Key Engineering Materials 841 (May 2020): 327–34. http://dx.doi.org/10.4028/www.scientific.net/kem.841.327.

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Natural Fibre composites are being widely used as a replacement to non-bio-degradable polymer composites. The unavailability of proper processes to treat the natural fibres and the errors in fabrication result in less accurate mechanical properties. The accuracy that is obtained by machine-based processes is not possible in Hand layup method, which is employed in fabrication of natural fibre composites. Finite Element method packages which are specially intended in modelling composite structures give more accurate result of properties than experimental setup, by avoiding fabrication errors. This paper evaluates Impact energy and then the tensile strength, flexural strength of a sugarcane fibre GFRP reinforced polymer matrix both by conventional Hand Layup method and also by Finite Element method.
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Saefkow, Martin, Matthias List, Andreas Schubert, Andreas Lohmüller, and Robert F. Singer. "Continuous Powder Extrusion for Fabrication of Carbon Fibre Reinforced Aluminium." Key Engineering Materials 742 (July 2017): 158–64. http://dx.doi.org/10.4028/www.scientific.net/kem.742.158.

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Short fibre reinforced aluminium was produced using the Temconex® process which is a continuous extrusion using a mixture of metal powder and ceramic short fibre as feedstock. The Temconex® process was derived and further developed from the ConformTM process which uses metal rod rather than powder as feedstock. In the present paper the effect of the prechamber length on the mechanical properties was examined. As material Al99.7 powder with different volume fractions of milled carbon fibres was used. Distribution, orientation and geometry of the embedded fibres were examined using light microscopy. The mechanical properties were determined via tensile testing and resonance frequency analysis. An important increase of the Young’s modulus is observed because of the introduction of fibres. It can be rationalized based on Clyne’s Shear Lag model. Results show that an extension of the prechamber enhances the Young’s modulus and the elongation of fracture due to reduced fibre fracture and better fibre alignment.
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Dissertations / Theses on the topic "Fibre fabrication"

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Yeung, Anson Chi-Ming Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Polymer segmented cladding fibres: cross fibre modelling, design, fabrication and experiment." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2009. http://handle.unsw.edu.au/1959.4/43656.

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This thesis presents the first research on polymer-segmented-cladding-fibre (PSCF), an emerging class of microstructured- optical-fibres (MOFs), which allows single-mode operation with ultra-large-core area. This research covers the modelling, design, fabrication and experiment of the polymer optical cross-fibre (4-period-SCF) whose cross-sectional view resembles a cross. A new wedge waveguide model has been formulated and applied to demonstrate that for any given parameters, the cross fibre gives the same performance for single-mode operation as the N-period-SCFs (for N = 2, 6 and 8). These fibres behave identically if the high-index segment angle, θ1, is the same and the low-index segment angular width, θ2, is sufficiently large for negligible adjacent mode coupling effects. This remarkable finding has significant ramifications for SCF fabrication, design and performance. Theoretical predictions confirmed by experiments demonstrated that a cross-fibre is all that needed to fabricate a large-core single-mode-fibre with no geometry-induced birefringence. The high-index outer ring effects on the cross fibre single-mode performance have been systematically investigated for the first time. The study reveals that the ring index value higher than its core index has very strong effects on single-mode performance. Within a narrow range of θ1, the minimum fibre length required for single-mode operation is reduced but outside this angle range, longer single-mode length is required. Furthermore, the fibre can be anti-guiding if θ1 exceeds the cutoff angle. Incorporating the fabrication constraints, the optimal cross-fibre design with high-index ring is achieved by optimising the relative index difference, high-index segment angle and core-cladding diameter ratio. Two preform-making techniques developed for the cross-fibres fabrication include the cladding-segment-in-tube method and the core-cladding-segment-in-tube method. The innovative approach in these methods overcomes the problems of bubble formation and fractures, which are related to the fibre structure complexity and the polymer intrinsic properties and their processing. It enables the successful drawing of single-mode fibres. This thesis reports the first experimental demonstration of single-mode operation of large-core cross-fibre. Three experimental studies with different cross-fibre designs have demonstrated (i) large-core single-mode operation, (ii) high-index ring effects on fibre performance and (iii) cross-fibre optimal design trial. Apart from this, the 8-period-SCF fibre performance has been demonstrated experimentally.
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Chamberlin, Rod. "Dispersion decreasing fibre : fabrication and modelling." Thesis, University of Southampton, 1995. https://eprints.soton.ac.uk/399114/.

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In this thesis the design and fabrication of dispersion decreasing fibres has been investigated. Such novel fibres have a number of novel uses in pulse train generation and loss compensation. The use of fibre diameter control for the production of dispersion decreasing fibres has been investigated. This has proved to be a good technique, and has facilitated the production of a number of useful fibres. A fibre suitable for the generation of 40GHz trains of optical pulses has been produced. This fibre has successfully been used for the generation of optical pulse trains at this data rate. Modelling has been performed to predict the likely propagation characteristics of these pulses. This indicates that propagation with this source is limited to 750km with an amplifier spacing of 30km. The use of dispersion decreasing fibres for loss compensation has been investigated through numerical simulation. The results indicate that there are a number of key high order effects which all affect such fibres. In order for such a dispersion decreasing fibre the initial dispersion must be as low as possible. Further the use of a dispersion flattened preform may also be advisable. Dispersion decreasing fibres have also been used to produce dark soliton trains. The pulses produced have good propagation characteristics over a number of soliton periods. and appear bandwidth limited. The behaviour of the source is shown to be in good agreement with numerical modelling results.
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Sugden, Kate. "Fabrication and applications of fibre Bragg gratings." Thesis, Aston University, 1996. http://publications.aston.ac.uk/8094/.

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The consequences of fabricating Bragg gratings in various fibres, with or without hydrogen loading, and with varying laser power levels are explored. Three new techniques for fabricating chirped gratings are presented. Beams with dissimilar wavefront curvatures are interfered to give chirped gratings. With the same aim techniques of writing gratings on tapered fibres and on deformed fibres are also covered. With these techniques, a wide variety of gratings has been fabricated from the 'superbroad' (with bandwidths of up to 180 nm), small to medium bandwidth gratings with linear chirp profiles and quadratic chirped gratings. It is demonstrated that chirped grating can be concatenated to form all-fibre Fabry-Perot and Moiré resonators. These are further concatenated with chirped gratings to produce filters with narrow passbands and very broad stopbands. A number of other applications are also addressed. The use of chirped fibre gratings for dispersion compensation and femtosecond chirped pulse amplification is demonstrated. Chirped gratings are used as dispersive elements in modelocked fibre lasers producing ultrashort pulses. A chirped fibre grating Fabry-Perot transmission filter is used in a continuous wave laser that exhibits eleven simultaneously lasing wavelengths. Finally, the use of grating-coupler devices as variable reflectivity mirrors for laser optimisation and gain clamping is considered.
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Athanasiou, Giorgos S. "The fabrication of chalcogenide glass fibre photonic components." Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606721.

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Photonics is revolutionising the way we live in a similar way to what electronics historically did. The main aim of this PhD project was to investigate and develop fabrication techniques leading to the realisation of mid-infrared photonic components based entirely on chalcogenide glass compositions which were prepared in-house, here at the University of Nottingham, Nottingham, UK. Chalcogenide glasses are based on the chalcogen elements of Group XVI of the Periodic Table and were chosen over conventional silica glass in the work described in this thesis for their significant advantages such as: a wide transmission window, for wavelengths of light from O .5 ~tm up to 25~tm depending on the glass composition, low phonon energies, high non-linearities and high refractive indices. The chalcogenide glass systems of As-Se, Ge-As-Se and Te-As-Se were synthesised and a new quenching technique was developed to prevent ampoule failures. In addition, the distillation of Te-As-Se system was optimised via the use of temperature monitoring. Two simulations were developed using commercial software; the first led to a large mode area, endlessly single mode microstructured optical fibre design and the second verified the photonic band gaps of a photonic band gap fibre from the literature. In particular, a methodology leading to the automation of chalcogenide glass cane drawing, a hot-collapse rig for investigating hot-collapsing of a tube onto a rod and a stacking mechanism for stacking chalcogenide glass canes have all been established as part of fabrication route that has been d~veloped towards the realisation of a chalcogenide glass all-solid core microstructured optical fibre (MOF) comprising 37 core/clad canes based on the design parameters simulated. Furthermore, a robust method for obtaining for the first time multimode optical couplers based on core-clad chalcogenide glass fibre using the method of fibre sidepolishing has been demonstrated experimentally. A key feature is a novel and reproducible procedure developed for obtaining controlled side (D) polishing of chalcogenide glass fibre using an innovative polishing apparatus. These achievements are particularly noteworthy because chalcogenide glass fibre is "more toxic (requiring the use of fume extractors), requires inert atmosphere to prevent oxidation and complicated preparation methods, is difficult to handle and, due to the higher refractive indices, exhibits a higher degree of reflection at glass-air (~20%) interfaces than conventional silica glass fibre. Over the last few years, infrared rnicroscopy (IR) has gained interest and has been used to study cells and tissues for cancer diagnosis. The fabrication of IR-transmitting chalcogenide glass optical fibre tips has been investigated and tips exhibiting reproducible and controlled taper geometries have been demonstrated experimentally. f --- Additionally, methods for metal-coating the tips in a thermal evaporation chamber and cleaving the tips using a focused ion beam (FIB) have been successfully developed. Small diameter tips have been used as an IR probe in scanning near-field infrared microscopy (SNIM) and larger diameter tips for transflection spectroscopy in an attempt to obtain optical and topographical cell tissue data for cell IR fingerprint recognition of Chinese Hamster Ovary cells using synchrotron radiation by employing B22 Beamline of the Diamond Light Source, Oxford, UK. IR spectra was successfully collected and showed good indication of the amide I and amide II bands related with cell DNA.
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Gillooly, Andrew M. "Advanced Fibre Bragg Grating fabrication systems and devices." Thesis, Aston University, 2005. http://publications.aston.ac.uk/8016/.

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This thesis address the creation of fibre Bragg grating based sensors and the fabrication systems which are used to manufacture them. The information is presented primarily with experimental evidence, backed up with the current theoretical concepts. The issues involved in fabricating high quality fibre Bragg gratings are systematically investigated. Sources of errors in the manufacturing processes are detected, analysed and reduced to allow higher quality gratings to be fabricated. The use of chirped Moiré gratings as distributed sensors is explored, the spatial resolution is increased beyond that of any previous work and the use of the gratings as distributed load sensors is also presented. Chirped fibre Bragg gratings are shown to be capable of operating as in-situ wear sensors, capable of accurately measuring the wear or erosion of the surface of a material. Two methods of measuring the wear are compared, giving a comparison between an expensive high resolution method and a cheap lower resolution method. The wear sensor is also shown to be capable of measuring the physical size and location of damage induced on the surface of a material. An array method is demonstrated to provide a high survivability such that the array may be damaged yet operate with minimal degradation in performance.
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Yeow, May Ling. "Fabrication of poly(vinylidene fluoride) hollow fibre membranes." Thesis, University of Bath, 2004. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426179.

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Webb, Andrew. "Novel optical fibre fabrication techniques for Yb-doped high-power fibre lasers and sensing applications." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/349228/.

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The work presented in this thesis reports on four novel techniques for fabricating speciality silica preforms and optical fibres. The project aims were to conceive new fabrication methods by adapting conventional Modified Chemical Vapour Deposition (MCVD) and optical fibre drawing equipment, and to demonstrate fibre devices for ytterbium (Yb)-doped high-power fibre lasers (HPFL) and optical sensing applications. Firstly, a new in-situ solution doping technique is presented for fabricating actively-doped fibre-preforms of complex design. The fabrication and characterisation of several multilayered rare-earth (RE)-doped fibres suitable for HPFL applications are reported, including an Yb-doped (>18,000ppm, by weight) fibre with a low effective-NA, which incorporates a pedestal refractive index profile and a unique aluminosilcate (Al:Si) inner-cladding. The vapour-phase deposition of RE ions in fibre-preforms has also been demonstrated using a novel chemical-in-crucible process that is intended for use with precursors of low volatility. Modifications to the standard MCVD setup were made which allows the dopant source to be placed within the substrate glassware and in close proximity to the reaction zone. Preforms with dopant concentrations of up to 25,000 ppm (by weight) of Yb3+ ions have been attained using an organometallic precursor, whilst passive Al:Si preforms containing >16mol% of Al have been achieved using gaseous aluminium chloride. A straightforward fabrication technique for producing silica suspended-core holey fibre (SC-HF) is also presented. The drawn fibre exhibits a relatively low optical loss (of 0.3 dB.m-1 at λ = 1550nm), and the high air-filling fraction, which was predicted as ~30% (for a core size of 0.8μm), is believed to the highest reported value at the time the work was undertaken. The sensing capability of SC-HF has been demonstrated by constructing an all-fibre acetylene-filled gas cell. The final experimental chapter describes the first example of a novel flat fibre concept. Extended lengths of low-loss planar glass substrates were produced using MCVD and conventional fibre drawing equipment. In combination with direct UV-writing, multifunctional planar waveguiding devices can be fabricated that are mechanically flexible. The potential of the flat fibre platform for sensing applications is discussed. The reported fabrication techniques have been implemented through the successful demonstration of several fibre devices suitable for Yb-doped HPFLs and optical sensing applications. The developed techniques have future potential in industry and manufacturing, and it is anticipated that the work presented will enable fibres with novel properties and glass compositions to be researched.
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Grigoleto, Hayashi Juliano. "Wire Array Infrared Metamaterial Fibres: Fabrication and Applications." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17790.

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Metamaterials are artificial composite materials that exhibit exotic properties due to their components and sub-wavelength structure. During the past decades, several new materials have emerged from this research field with exciting new optical properties and applications. However, the fabrication of certain meta-structures remains a challenge, particularly with low cost and in large volumes. Fibre drawing is an attractive alternative to overcome such problems, but currently fabrication constraints restrict the size of the metal/dielectric drawn structures, limiting their operation to THz frequencies. In this context, this thesis concerns the fabrication, characterization, and use of new soft-glass based wire array metamaterials fibres for applications in the infrared. Numerical modelling of wire array structures is presented to understand which material combinations and structural parameters are more appropriate for infrared metamaterial fibres. The co-drawing process used is described, focusing on the adaptations used to minimize fluctuation of the structure due to fluid dynamics. Metamaterial fibres with uniform structures containing wire diameter and spacing on the order of few hundreds of nm are produced, which are compatible with operation at mid-infrared frequencies. The fabrication of metamaterial fibre tapers with steep transitions, generating hyperlenses, is also demonstrated. Far field imaging is attempted and the challenges regarding subdiffraction imaging are discussed. Feasible alternatives for future far field super-resolution imaging are proposed based on our numerical modelling and the typical structural transitions fabricated. Since the operational range of our hyperlenses is not limited to the infrared, subdiffraction focusing of 1/176 of the operational wavelength is reported at THz frequencies, achieved by combining a polymer hyperlens with our new infrared hyperlens.
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Cooper, Laurence James. "Fabrication of novel geometry fibre lasers for high power applications." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/38958/.

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This thesis details my work on the development of fabrication techniques for high power doped fibre lasers, using novel fibre geometries, and their demonstration. The main methods for increasing output power were using helical cores, multiple cores and large cores. A method for fabricating helical core fibres was proposed and implemented. Core and cladding pumped devices were successfully constructed, and were then tested in collaboration. A cladding pumped helical core fibre laser improved the beam from a 30μm core from an M2 of 3.3 to < 1.4, with a maximum output power of 64W and slope efficiency of 84%. A ribbon fibre with multiple laser emitting cores was fabricated. The difficulties in the fabri- cation of such a fibre required extensive research, and arise from the large aspect ratio of the preform and fibre, and the low size reduction during fibre drawing. Through many steps a ten core ribbon fibre was fabricated, which was used, in collaboration, to achieve an output laser power of 250W, with a slope efficiency of 65%. Using a spectral beam combination technique, 5 cores were locked together. The output from a number of cores within a circular fibre with no combination is a method for attaining stable high powers with moderate beam quality. A three core fibre was fabricated, and showed an M2 of 5 and slope efficiency of 75%. This fibre was then tapered down from 150μm in order to improve the beam quality further, and for 125μm and 100μm tapers, the M2 values measured were improved to 4.3 and 3.5, respectively. An Yb-doped rod was fabricated, with a large core of 140μm diameter, and machined flats to break the cladding symmetry. The power attained was only 13.4W with a slope efficiency of 20%, due to surface imperfections. A fibre created with altered fabrication techniques showed no surface defects and showed over 90% transmission for 800nm light. Experiments performed by a colleague showed a slope efficiency of 69% and an M2 of 11, indicating that the fabrication method could create an effective cladding pumped rod laser.
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Krishnamurthy, S. "Pre-stressed advanced fibre reinforced composites fabrication and mechanical performance." Thesis, Cranfield University, 2006. http://hdl.handle.net/1826/1039.

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Advanced composite materials have high strength-to-weight ratios, corrosion resistance and durability and are extensively used in aerospace, energy and defence industries. This research concentrates on minimising the process-induced residual stresses, and improving the fibre alignment of composites by employing a fibre prestress methodology. A novel flat-bed fibre prestress methodology for autoclave processing of composites was developed. This research investigates the effect of fibre prestress on 1) residual stresses, 2) fibre alignment, 3) static tensile and compression properties and 4) fatigue behaviour of composites. Experimental results show that this prestress methodology, on a 16-ply unidirectional E-glass/ 913 epoxy composite, reduces the residual strain of the composite from –600 µε to approximately zero for a prestress of 108 MPa. The strains measured from optical fibre sensors were in close agreement with those obtained using strain gauge. The results from fibre alignment studies showed that fibre prestressing improved the fibre alignment from 20% of fibres aligned to 0 ° degree in non-prestressed composites to 75% of fibres aligned to 0 ° degree in 108 MPa prestressed composites. Findings have shown that prestressing is beneficial to the static compressive and tensile performance of composites. The results show that fibre prestressing improves the fatigue life and resistance to stiffness degradation in the low stress level fatigue region. Also a change in static and fatigue damage mechanism was observed. The improvement in the static and fatigue properties is due to the reduction in residual stresses and fibre waviness. Overall the fibre prestressing methodology enhances the performance of composites by increasing the resistance to static and fatigue loading. The thesis also suggests that there is an existence of prestress limits to retain optimal material performance.
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Books on the topic "Fibre fabrication"

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Sugden, Kate. Fabrication and applications of fibre Bragg gratings. Birmingham: Aston University. Department of Electrical andElectronic Engineering and Applied Physics, 1996.

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Lee, Xavier. Development of a Bragg grating fabrication facility and demonstration of its capabilities in fibre based telecommunication, laser, and sensor applications. [Toronto, Ont.]: University of Toronto, Graduate Dept. of Aerospace Engineering, 1995.

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Lee, Xavier. Development of a bragg grating fabrication facility and demonstration of its capabilities in fibre based telecommunication, laser, and sensor applications. Ottawa: National Library of Canada, 1994.

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Steve, Parker. Les textiles. Bonneuil-les-Eaux [France]: Gamma, 2002.

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Canada, Canada Environnement. Fibres minérales (fibres vitreuses de fabrication humaine). Ottawa, Ont: Ministre des approvisionnements et services Canada, 1993.

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Izawa, T. Optical fibers: Materials and fabrication. Tokyo: KTK Scientific Publishers, 1987.

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k, Kokula Krishna Hari, ed. Fabrication of Glass Fiber Helmet: ICIEMS 2014. India: Association of Scientists, Developers and Faculties, 2014.

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Nicholas, Anne. Fabrications: Works by forty New Zealand fibre artists. Auckland, N.Z: Random Century, 1990.

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Alvi, Bilal Ahmad. Fabrication and light guiding of special optical fibres. Salford: University of Salford, 1993.

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Center, Amer Research, ed. Fabrication and testing of fire resistant graphite composite panels. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1988.

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Book chapters on the topic "Fibre fabrication"

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Mohamed, H., D. W. Bao, and R. Snooks. "Super Composite: Carbon Fibre Infused 3D Printed Tectonics." In Proceedings of the 2020 DigitalFUTURES, 297–308. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4400-6_28.

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AbstractThis research posits an innovative process of embedding carbon fibre as the primary structure within large-scale polymer 3D printed intricate architectural forms. The design and technical implications of this research are explored and demonstrated through two proto-architectural projects, Cloud Affects and Unclear Cloud, developed by the RMIT Architecture Snooks Research Lab. These projects are designed through a tectonic approach that we describe as a super composite – an approach that creates a compression of tectonics through algorithmic self-organisation and advanced manufacturing. Framed within a critical view of the lineage of polymer 3D printing and high tech fibres in the field of architectural design, the research outlines the limitations of existing robotic processes employed in contemporary carbon fibre fabrication. In response, the paper proposes an approach we describe as Infused Fibre Reinforced Plastic (IFRP) as a novel fabrication method for intricate geometries. This method involves 3D printing of sacrificial formwork conduits within the skin of complex architectural forms that are infused with continuous carbon fibre structural elements. Through detailed observation and critical review of Cloud Affects and Unclear Cloud (Fig. 2), the paper assesses innovations and challenges of this research in areas including printing, detailing, structural analysis and FEA modelling. The paper notes how these techniques have been refined through the iterative design of the two projects, including the development of fibre distribution mapping to optimise the structural performance.
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Zantout, B., A. A. Das, and A. J. Clegg. "Fabrication of Fibre-Reinforced Aluminium Alloy-Matrix Composites." In Advances in Manufacturing Technology, 345–52. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4757-1355-8_48.

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Gupta, Upendra Sharan, Mohit Dhamarikar, Amit Dharkar, Siddhartha Chaturvedi, Sudhir Tiwari, and Rajeev Namdeo. "Advanced Fabrication of Banana Fibre-Based Hybrid Composites." In Manufacturing and Industrial Engineering, 191–210. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003088073-12-12.

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Mai, Y. W. "Advanced Fibre Composites with Engineered Interfaces." In Advanced Technology for Design and Fabrication of Composite Materials and Structures, 241–60. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8563-7_17.

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Kröplin, B., D. Dinkler, and A. Fink. "Constitutive Laws for Fibre Reinforced Ceramics." In Advanced Technology for Design and Fabrication of Composite Materials and Structures, 101–11. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8563-7_8.

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Fitzer, E., G. Hannes, and H. Jäger. "Fabrication of Carbon Fibre Reinforced Thermoplastics Polycarbonate and Polysulfone." In Nonmetallic Materials and Composites at Low Temperatures, 161–66. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-2010-2_18.

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Gebhard, Lukas, Jaime Mata-Falcón, Tomislav Markić, and Walter Kaufmann. "Aligned Interlayer Fibre Reinforcement for Digital Fabrication with Concrete." In RILEM Bookseries, 87–98. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58482-5_8.

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Ramesh Kumar, T., T. Guruprakash, P. Nandha Kumar, R. Gokul, and A. Ramakrishnan. "Study on Fibre Behaviour for Chemical Treatment and Fabrication of ABS-Based Fibre Composite." In Lecture Notes in Mechanical Engineering, 103–20. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9809-8_8.

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Carpinteri, A., and R. Massabò. "Nonlinear Fracture Mechanics Models for Fibre Reinforced Materials." In Advanced Technology for Design and Fabrication of Composite Materials and Structures, 31–48. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8563-7_3.

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Beddoes, J., A. K. Koul, and P. Saxena. "Fabrication of Continuous SiC Fibre Titanium Matrix Axi-Symmetric Composites." In Design and Manufacturing of Composites, 273–84. New York: CRC Press, 2021. http://dx.doi.org/10.1201/9781003076131-50.

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Conference papers on the topic "Fibre fabrication"

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Potton, R. J., A. D. Boardman, G. S. Cooper, and P. Papadopoulos. "Fabrication And Simulation Of Optical Fibre Gratings." In Fibre Opitcs '86, edited by Lionel R. Baker. SPIE, 1986. http://dx.doi.org/10.1117/12.963614.

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Wang, Changle, Zhijun Yan, Qizhen Sun, Zhongyuan Sun, Chengbo Mou, Junxi Zhang, Abdulyezir Badmos, and Lin Zhang. "Fibre Bragg gratings fabrication in four core fibres." In SPIE Photonics Europe, edited by Kyriacos Kalli and Alexis Mendez. SPIE, 2016. http://dx.doi.org/10.1117/12.2227040.

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Popov, Mikhail, Fredrik Carlsson, and Pierre-Yves Fonjallaz. "Design and fabrication of superimposed fibre Bragg gratings: towards the optimality." In Photonics Fabrication Europe, edited by Valerio Pruneri, Robert P. Dahlgren, and Gregory M. Sanger. SPIE, 2003. http://dx.doi.org/10.1117/12.468561.

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Sargood, S. K., J. Haigh, M. J. Robertson, and A. S. M. Ali. "Fabrication Of InAsSbP PIN Detectors For 2.56µm Wavelength Operation." In Fibre Optics '88, edited by Lionel R. Baker. SPIE, 1988. http://dx.doi.org/10.1117/12.947517.

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Reben, Manuela, Jan Wasylak, and Dominik Dorosz. "Tellurite glasses for optical fibre fabrication." In SPIE Proceedings, edited by Jan Dorosz, Ryszard S. Romaniuk, and Tomasz R. Wolinski. SPIE, 2008. http://dx.doi.org/10.1117/12.804520.

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Vukovic, Natasha, Neil G. R. Broderick, Marco Petrovich, and Gilberto Brambilla. "Fabrication of metre-long fibre tapers." In 2008 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2008. http://dx.doi.org/10.1109/cleo.2008.4551541.

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Eisner, M., and J. Schwider. "Fabrication of Silicon Microlenses." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cthi15.

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Melting photoresist cylinders is an often described /l/ and effective method to produce microlenses. One of the possible application areas is optical communications where they serve as coupling elements between the light source and the fibre or between the fibre and the detector. In optical communications single mode fibres are preferred because of the absence of mode dispersion and mode noise. For this case the working wavelength lies in the infrared frequency band (e.g. 1300nm) and so resist lenses are not suited because of their high absorption coefficient. One possible solution is the use of silicon microlenses which can be obtained by reactive ion etching (RIE) of the resist lenses. In order to get well defined lenses an extensive study of the each parameters is necessary. The melting process of resist cylinders produces nearly ideal spherical lenses because of the surface tension. A “one to one" copy by RIE of such resist lens into silicon is not possible. Apart from die fact that it is difficult to obtain a selectivity of 1:1 between resist and silicon which would guarantee equal heights of resist and etched lens the main reason for this behaviour is the specific etch mechanism of the RIE. The etching process is of a chemical nature supported by ion bombardment.
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Parmar, Vinod, Pawan K. Kanaujia, Ravi Kumar Bommali, and G. Vijaya Prakash. "Femtosecond Laser Based Fabrication of Nanostructured Silicon." In International Conference on Fibre Optics and Photonics. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/photonics.2016.w3a.91.

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Pfeifer, Tilo, Ubaldo Aleriano, and Frank Depiereux. "Gripping tool for MEMS Assembly with an absolute distance measurement sensor using a fibre optic WL interferometer with high measuring frequency." In Photonics Fabrication Europe, edited by Uwe F. W. Behringer, Bernard Courtois, Ali M. Khounsary, and Deepak G. Uttamchandani. SPIE, 2003. http://dx.doi.org/10.1117/12.468417.

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Joshi, Sunil C., and Y. C. Lam. "FIELD ANALYSIS AND MODELLING OF FIBRE REINFORCED POLYMER COMPOSITES MANUFACTURING." In Processing and Fabrication of Advanced Materials VIII. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812811431_0116.

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Reports on the topic "Fibre fabrication"

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Besmann, T. M., W. M. Matlin, D. P. Stinton, and P. K. Liaw. Fabrication of fiber-reinforced composites by chemical vapor infiltration. Office of Scientific and Technical Information (OSTI), June 1996. http://dx.doi.org/10.2172/450751.

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Holmes, Jr, Wolbert Larry R., Gardner James P., and Jared M. A Method for Out-of-autoclave Fabrication of High Fiber Volume Fraction Fiber Reinforced Polymer Composites. Fort Belvoir, VA: Defense Technical Information Center, July 2012. http://dx.doi.org/10.21236/ada564674.

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Frame, B. J., and W. G. Dodge. Wet-filament winding fabrication of thick carbon fiber/polycyanate resin composite. Office of Scientific and Technical Information (OSTI), June 1997. http://dx.doi.org/10.2172/565219.

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White, L. R. Fabrication of commercial-scale fiber-reinforced hot-gas filters by chemical vapor deposition. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/10139196.

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White, L. R. Fabrication of commercial-scale fiber-reinforced hot-gas filters by chemical vapor deposition. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/6717543.

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Myott, C. F. Fire loading calculations for 300 Area N Reactor Fuel Fabrication and Storage Facility. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10169313.

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Holmes, Jr, and Larry R. A Fully Contained Resin Infusion Process for Fiber-Reinforced Polymer Composite Fabrication and Repair. Fort Belvoir, VA: Defense Technical Information Center, January 2013. http://dx.doi.org/10.21236/ada570994.

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Caputo, A. J., R. A. Lowden, and D. P. Stinton. Improvements in the fabrication of ceramic-fiber-ceramic-matrix composites by chemical vapor infiltration. Office of Scientific and Technical Information (OSTI), June 1985. http://dx.doi.org/10.2172/5425226.

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Holmes, Jr, and Larry R. Research Update for: A Method for Out-of-autoclave Fabrication of High Fiber Volume Fraction Fiber Reinforced Polymer Composites (ARL-TR-6057). Fort Belvoir, VA: Defense Technical Information Center, October 2012. http://dx.doi.org/10.21236/ada571902.

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Spurgeon, William A. Thickness and Reinforcement Fiber Content Control in Composites by Vacuum-Assisted Resin Transfer Molding Fabrication Processes. Fort Belvoir, VA: Defense Technical Information Center, June 2005. http://dx.doi.org/10.21236/ada436340.

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