Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 4166 for “"fiber"”.
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In-fiber Optical Devices Based on D-fiber
… presents the fabrication and analysis of in-fiber devices based on elliptical core D-shaped optical fiber. Devices created inside optical fibers are attractive for a variety of reasons including low loss, high efficiency, self-alignment, light weight, multiplexibility, and resistance to …
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Implications of Fiber Nonlinearities on Coherent Optical Fiber Communications
… with the capacity ultimately limited by Kerr fiber nonlinearities. The research presented in this thesis focuses on exploring solutions to fulfill the demand for increased capacity and studying advanced techniques for modelling and characterizing systems, predicting performance, and estimating …
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Optical fiber temperature sensor based on fiber bragg grating
It is important to study optical fiber temperature sensor based on fiber Bragg Grating. The Fiber Bragg grating sensors can offer highly sensitive, cost effective solutions for optical sensing. While fiber Bragg gratings have been implemented in various sensing applications over the past few …
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Detection of fiber fracture in Unidirectional Fiber Reinforced Composites using an In-Plane Fiber Optic Sensor
Fiber reinforced polymers (FRP) are an efficient and inexpensive method of repairing deteriorating infrastructure. FRP sheets can be applied to spalling bridge sections and columns to prevent further deterioration and increase stiffness. However, the effect of the environment on the long-term …
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Prediction of Fiber Orientation During Processing of Short Fiber Composites
The fiber orientation pattern created by the flow of a suspension of short fibers controls the physical and mechanical properties of a short fiber composite material. The orientation of the fibers at any point in the composite plays the role of a structural state variable. Two sets of even-order …
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Chemical composition and fiber structure as factors affecting fiber fermentation
… of cellulose as a factor affecting fiber fermentation by ruminants was studied. Using in vitro methodology, a significant improvement in rate of fermentation of wheat straw following alkaline hydrogen peroxide (AHP) treatment (treatment times of 1 h, 2 h or 3 h) was noted. Alkaline …
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Flexural behavior of a glass fiber reinforced wood fiber composite
… static and dynamic flexural properties of a wood fiber matrix internally reinforced with continuous glass fibers were investigated. When modelled as a sandwich composite, the static flexural modulus of elasticity (MOE) of glass fiber reinforced hardboard could be successfully predicted from the …
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Analysis of fiber-reinforced composite plates utilizing curvilinear fiber trajectories
… located circular holes were manufactured using a fiber placement technique. With two plates the fibers were steered around the holes in curvilinear trajectories. With the two other plates the fibers were placed in the conventional straight line format. For the case of the curvilinear trajectories, …
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Multimaterial fiber electronics
… of materials that are thermally-drawable into fibers is rapidly expending, numerous new multimaterial fiber architectures can be envisioned and fabricated. High-melting temperature metals, compound materials, composite, conductive or ferroelectric polymers: the broad diversity of these …
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Heat Transfer and Consolidation Modeling of Fiber Tow in Fiber Placement
… tools and a composite towpreg in the automated fiber placement process. This dissertation suggests new heating techniques with liquid and rigid contact heat sources, and compares them with a widely used gas heat source for the fiber placement process. A thin towpreg composite model needs to be …
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Evaluation of fiber-matrix interfacial shear strength in fiber reinforced plastics
The role of the interphase in fiberglass reinforced composites was studied by a combination of theoretical analysis, mechanical tests, and several high-resolution analytical techniques. The interphase was varied in composition by using epoxy and polyester matrix polymers with and without added …
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Fiber fracture in continuous-fiber reinforced composite materials during cyclic loading
… due to the failure of its constituents, namely fibers and matrix in the present case. To date, no experimental data exists, to the author’s knowledge, to define the behavior of constitutive fibers of a composite structure throughout its life span. The prime candidate for a fiber-based …
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The effect of three levels of a soy polysaccharide fiber on plasma lipids, fecal fiber, and apparent fiber digestibility
… to four complete liquid diets at four different fiber levels; one without added soy polysaccharide fiber which served as a control. All subjects were rotated. through four, eleven day controlled feeding periods. Complete fecal samples were collected and composited from the last five days of each …
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The single fiber pull-out test: a study of fiber/matrix interactions
The single fiber pull-out test was employed to experimentally model the failure of an embedded optical fiber in neat resin. The objective was to evaluate load transfer between resin and fiber through the evaluation of the sensitivity of the single fiber pull-out test to the physical parameters of …
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Self Similar Optical Fiber
<p>This research proposes Self Similar optical fiber (SSF) as a new type of optical fiber. It has a special core that consists of self similar structure. Such a structure is obtained by following the formula for generating iterated function systems (IFS) in Fractal Theory. The resulted SSF can be …
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Optoelectronic fiber interface design
… to the development of an exciting, new class of fibers which integrate metals, semiconductors and insulators in the same codrawing process. Various electrical devices have been produced in these fibers including optical sensors, thermal sensors and even transistors. The use of these fiber devices …
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Polyethylene fiber drawing optimization
Polymer fiber drawing creates fibers with enhanced thermal conductivity and strength compared to bulk polymer because drawing aligns the molecular chains. I optimize the polymer fiber drawing method in order to achieve polymer fibers that are drawn to lengths exceeding 1cm and develop a method to …
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Multimaterial multifunctional fiber devices
Optical fibers and semiconductor devices differ significantly in their properties and their processing approaches. The latter require an assembly of metal, insulator and semiconductor materials into complex geometries with small feature sizes (sub 100 nm), while maintaining high quality interfaces. …
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Fiber inspired neural probes
… (TDP), widely used in fabrication of optical fibers, to create arrays of metal microelectrodes embedded in a polymer cladding. The pitch and size of the electrodes were determined on the macroscale and preserved during the TDP. I have applied these fiber-inspired probes to record spontaneous …
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