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.
Results
Showing 1 to 20 of 44 for “"Multiple Materials"”.
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Design and fabrication of a modular multi-material 3D printer
… to develop. In addition, the simultaneous use of multiple materials in 3D printing has not been extensively explored. The printer presented in this thesis was developed to address these shortcomings. The printer features a low-cost high-performance design largely using commercial off-the-shelf …
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Integrated multi-media platform for hybrid 3D printing
… exist that are able to print parts composed of multiple materials within a single platform, but the library of usable materials is restricted to certain subsets that are dependent on the technology being used. In this thesis, the concept of Hybrid 3D Printing is introduced as a solution to the …
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Multi-Material Discrimination Using Photon Counting Spectral Computed Tomography
Quantitative volumetric mapping of multiple materials with spectral computed tomography (CT) has applications in many areas including biomedical imaging, defense and security, geophysical imaging of rock composition and in materials and chemical imaging. Dual or multi-kVp x-ray exposure when using …
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A Hermite Cubic Immersed Finite Element Space for Beam Design Problems
… simulations arising from beam design with multiple materials. This IFE space is based upon meshes that can be independent of interface of the materials used to form a beam. Both the forward and inverse problems associated with the beam equation are considered. The order of accuracy of this …
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Design and fabrication of multimaterial electrohydrodynamic-jet deposition system
… The uniqueness lies in the ability to utilize multiple materials in the same overall print-head thereby enabling increased degrees of heterogeneous integration of different functionalities on a single substrate. By utilizing multiple individual print-heads, with a carrousel indexing among them, …
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High precision electrohydrodynamic printing of polymer onto microcantilever sensors
… method is a precise way to deposit multiple materials onto micromechanical sensors with greater resolution and repeatability than current methods.
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The creation of fiberglass tanks and parts for autonomous underwater vehicle constant buoyancy power supply
… an Autonomous Underwater Vehicle, or AUV. While multiple materials and techniques were considered for construction, the final tanks were made using lost foam molds and epoxy resin. This secondary purpose of this thesis was to provide a detailed description of how to create fiberglass parts, …
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Ultrasonic inspection methods for defect detection and process control in roll-to-roll flexible electronics manufacturing
… of custom wedges were designed and machined from multiple materials to test their suitability at launching ultrasonic Lamb waves along Polyethylene Terephthalate (PET) film. Using hydrogel wedges, the fundamental antisymmetric (Ao) Lamb wave mode was successfully propagated a distance of 2 cm. ABS …
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Defextiles: 3D Printing Quasi Woven Textiles via Underextrusion
… mechanical properties of DefeXtiles printed with multiple materials and parameters. Additionally, I demonstrate the interactive features and new use cases of our approach through a variety of applications, such as fashion design prototyping, interactive object, aesthetic lace patterning, and …
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A programmable pipeline for multi-material fabrication
… scaling up to output continuous mixtures of multiple materials at increasing resolution over ever larger print volumes. This poses an enormous computational challenge: large high-resolution prints comprise trillions of voxels and petabytes of data and simply modeling and describing the input …
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Ferroelectricity Coupled To Octahedral Rotations In Perovskite Oxides From First Principles
… in perovskite oxides, a large class of ceramic materials that exhibit an unprecedented diversity of physical properties. Some perovskites exhibit ferroelectricity, the existence of a field-switchable electric polarization. Other perovskites exhibit rotations of the oxygen octahedra, which …
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Biofabrication of a Heart Wall Section using the FRESH Bioprinting Method
… on three different aspects. The first is around materials that mimic the different cardiac wall tissue layers by testing the different materials pre- and post-crosslinked for their characteristics and behaviour. Secondly, it explores the adaptation of a 3D printer for bioprinting using the FRESH …
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Macroscale Design and Modeling of Multifluidic Cantilever Devices for Advanced Nanoscale 3D Printing Applications
… nanoscale 3D printer to accommodate the use of multiple materials in a desired print. The project will develop designs of different potential fluid switching mechanisms, model their performance and fabricate them for future experimentation, and attempt to determine a suitable scaling factor for …
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Sputtering fabrication of silicon nitride and silicon oxide based dichroic mirrors
Thin films in optical materials utilize the properties of multiple materials to obtain specific and fine-tuned transmission, absorption and reflectance at wavelengths. Dichroic mirrors exhibit very different reflectance and transmission rates at certain cut-off wavelengths, which can be adjusted …
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Parametric analysis of part suitability in Additive Manufacturing
… of highly complex geometries, the combination of multiple materials to achieve specific physical properties, and the consolidation of assemblies into single parts. Although many of the prominent processes were invented 20-30 years ago, we are now seeing rapid performance improvement and the …
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A modular device for vaginal administration of multiple therapeutic agents
… of fabrication of complex devices containing multiple drugs and multiple materials and can offer different kinetics and mechanisms of drug release within the same device. Various model drugs will be used to demonstrate the concept: MIV-150 is an experimental antiretroviral drug owned by …
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Byzantine Enamel and the Aesthetics of Technological Power, Ninth to Twelfth Centuries
… demanded fluency in the physical properties of multiple materials and proficiency in what we know today as graphic design. This dissertation emphasizes how the ability to manufacture enamel was significant in and of itself, and explores how cloisonné enamel became infused with cultural meaning …
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Finite element analysis of 3D electric machine problems
… of handling the inherent complexity, such as multiple materials, complicated geometry, eddy currents, and saturation. In this thesis, we adopt the finite element method, one of the most powerful numerical schemes, to analyze electric machine problems. Starting from Maxwell’s equations, we …
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Engineering Biomedical and Bioinspired Fiber Devices via Thermal Drawing
… fibers. Based on various properties of multiple materials in a single fiber, multifunctional fibers have been studied for diverse applications such as sensing, battery, computing, and biomedical devices. In this thesis, I develop approaches to expand use of thermally drawn fibers in …
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