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 17 of 17 for “"Aligned fibers"”.
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Performance and Design of Extruded Fiber-Reinforced Mortar with Preferentially Aligned Fibers
… suggests that the extrusion process, by aligning fibers parallel to tensile stresses, significantly enhances the concrete's ductility, post-peak behavior, and overall fracture and flexural properties. This hypothesis was corroborated across various experiments, which demonstrated that fiber …
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A Method for Winding Advanced Composites of Unconventional Shapes using Continuous and Aligned Fibers
… achieved this by winding continuous, uncut, and aligned fibers. This process is called Lotus Filament Winding.</p>
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Simulation of tongue muscle deformation
… consists of a large array of variably aligned and extensively interwoven intrinsic and extrinsic muscles. To elucidate the explicit relationship between 3D aligned lingual fiber organization and mechanics during physiological deformations, we performed finite element modeling (FEM) …
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Fiber orientation in injection-molded composites: A comparison of theory and experiment
… 6/6 reinforced with 43 weight percent of glass fibers. The parts are a center-gated disk and a film-gated strip. Orientation is measured from polished cross-sections and reported as a function of position, both across the thickness and in the flow direction. Both parts have a layered structure, …
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Electromagnetic Control of Biological Assembly
… nanocellulose, resulting in networks with aligned fibers. Since the electrolysis of water due to the application of electric fields produces the oxygen in the culture media far from the liquid-air boundary, aerobic cellulose production in 3D structures is readily achievable. Five separate …
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Characterization of composites with aligned carbon nanotubes (CNTs) as reinforcement
… for rapidly growing dense, long, high-quality aligned CNT forests is employed. The first architecture is comprised of aligned fibers with CNTs grown radially on their surface. For the second architecture, dense forests of vertically aligned CNTs are placed between the plies of a laminate, in …
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Low-cost air particulate monitor based on particle capture and imaging
… captured either on flat substrate or aligned fibers are illuminated by LED light source with a glancing angle, or with the help of waveguides. Light scattered from the particles is detected by a CMOS camera module, yielding the particle size distribution and also revealing the …
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Interfacial Thermomechanical Behavior of Hybrid Carbon Fibers
… metal organic frameworks were grown on carbon fibers to improve the interfaces. The interfacial mechanics of the enhanced fibers are evaluated using nanoindentation studies. Composite samples with Aeropoxy matrix and vertically aligned fibers are fabricated for this purpose. A Bruker TI-980 …
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Extension of the Method of Ellipses to Determining the Orientation of Long, Semi-flexible Fibers in Model 2- and 3-dimensional Geometries
… 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 …
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A Suspended Fiber Network Platform for the Investigation of Single and Collective Cell Behavior
… from tumor-matrix interface and wounds along aligned fibers describe invasion to occur as singular leader (tip) cells, or as collective mass of a few chain or multiple tip cells. Recapitulation of these behaviors in vitro promises to provide new insights in how, when and where cells get the …
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Single Cell Force Platforms to Link Force-ECM Coupling in Pathophysiology
… Nanonet Force Microscopy (NFM) comprised of aligned nanonets is designed to study anisotropic cell shapes, while Crosshatch Force Microscopy (CM) comprised of orthogonal arrangement of fibers is designed to study cell bodies of broad shapes. The combination of shapes achieved on these …
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ELECTROSPINNING ROBOT FOR REGENERATIVE COATING OF IMPLANTS
… robotic control system, electric field focusing fibers, and additional aerodynamic forces terms ‘electroblowing’, the device can be produced across targets with strong topographic anisotropy. The second aim continues to enhance these attributes with biocompatible soy based scaffolds. Craniofacial …
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Complementary strategies to promote the regeneration of bone-ligament transitions using graded electrospun scaffolds
… collector resulted in the deposition of aligned fibers from one polymer solution in the gap region between the drums, randomly oriented fibers from the other polymer solution on one of the drums and a mixture of fibers from both polymer solutions in the overlap region in between. The …
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Microenvironmental Modulation of Breast Cancer Stem Cells Through Biological Matrix
… of electrospun fibrous scaffolds with random and aligned fiber orientations. Breast cancer cells were cultured on these fibrous scaffolds for 3-5 days. The cells showed elongated spindle-like morphology in the aligned fibers whereas kept mostly flat stellar shape in the random fibers. Gene …
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Polarimetric Characterization Of Random Electromagnetic Beams And Applications
… consisting of individual layers of partially aligned fibers with different degrees of alignment and packing fractions is also analyzed in this dissertation. It is demonstrated that a certain degree of alignment has the effect of a partial polarizer and that the efficiency of this polarizer …
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Near-Field Electrospinning and Characterization of Biodegradable Small Diameter Vascular Grafts
… around a commercial 3D printer to write PDO microfibers. The processing parameters of air gap, polymer concentration, translational velocity, needle gauge, and applied voltage were characterized for their effects on PDO fiber diameter. The processing parameters of polymer concentration and …