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 31 for “"resistive heating"”.
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Resistive heating for self-healing materials based on ionomeric polymers
… detect damage and heal itself using resistance heating. The composite material is composed of a conductive network embedded in a polymer matrix. The conductive network is used for damage detection and resistive heating. A matrix material is used that melts when heated and flows to fill damage. …
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Active Rigidization of Carbon Fiber Reinforced Composites via Internal Resistive Heating
… to uneven curing. This work presents internal resistive heating as an alternative approach for inducing matrix consolidation and curing of thermoset-coated carbon fiber tows. The ability to dictate this physical transformation through temperature-controlled resistive heating highlights the …
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Performance measurement of a ten kilowatt horizontal axis wind turbine
… were performed with the windmill powering a resistive heating load as well as charging a battery.
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Degradation of NiTi springs through electronic actuation
… resistance, actuation is most convenient through resistive heating. Therefore, this thesis evaluates the degradation of the consequent actuation force through electronic heating over the expected lifetime of 10.000 cycles. Results showed exponential decay with a maximum 6\% force degradation over …
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Propulsion via buoyancy driven boundary layer
Heating a sloped surface generates a well-studied boundary layer flow, but the resulting surface forces have never been studied in propulsion applications. We built a triangular wedge to test this effect by mounting a resistive heating pad to one of its conducting sloped surfaces. We submerge the …
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Development of a Self-Heating Consolidation Procedure for 3D-Printed Continuous Wire Polymer Composite Laminates
… CWPC laminates. The consolidation procedure used resistive heating combined with hot-pressing to reduce the internal voids. Image processing of sample cross sections proved the void content in consolidated samples were 91.6% lower compared to unprocessed, while flexural tests found 5% and 12% …
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Thermoplastic bonding of microfluidic substrates
… channel deformation. Energy imparted by resistively heating thin implants can be easily measured and observed. Resistive heating of implants was demonstrated as a low energy, parallel, and feasible microfluidic welding assembly process. Lessons from implant heating can be applied to more …
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High-throughput extrusion additive manufacturing using electrically resistive preheating
… limiting: speed of gantry positioning, polymer heating, and extrusion pressure. Advancements in any one module will allow for higher volumetric output, which will in turn allow for higher rates of production using FDM. This work focuses on polymer heating, and demonstrates a new concept for …
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Structural evolution of α-Fe2O3 nanowires during lithiation/delithiation and electrochemical property improvement
… α-Fe2O3 nanowires were prepared by an electrical resistive heating method under ambient conditions. Transmission electron microscopy characterized the anode material at various stages of lithiation and delithiation. The phase and morphological evolution demonstrate the conversion reaction process …
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Increased Functionality Porous Optical Fiber Structures
… conductivity to be used as metallic contacts or resistive heating elements.
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Microstructural formations and phase transformation pathways in tantalum carbides
… constructed where an electrical current provides resistive heating and, in the presence of a magnetic field, provides a Lorentz force for the application of a load on a test bar specimen. The electromagnetic Helmholtz coil can be used to independently control the magnetic flux, or load, while …
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An Investigation of the Surface Properties of Sic For the Growth of Gan Thin Films and Epilayers
… it is capable of cleaning the substrate through resistive heating. Due to uncontrollable events, further experiments for its successful operation were recommended.
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Design and Lab Implementation of an Air Source Transcritical CO2 Heat Pump
… from the system’s original evaporator coil with resistive heating controlled via feedback loops. Custom controllers for the TCHP were developed using ESP32 microcontrollers and open-source libraries. Controller gains were empirically tuned based on system response data, enabling precise operation …
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In situ curing of polymeric composites via resistive heaters comprised of aligned carbon nanotube networks
… this thesis the in situ curing of a PMC using a resistive heating film comprised of an aligned CNT network is developed, and the underlying physics that govern the electron transport properties of the aligned CNT network as a function of temperature and orientation are explored. Aligned CNT film …
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Annealing Cryogenically Irradiated High TemperatureSuperconductors with Current Pulses
… the critical current of the coated conductor, resistive heating briefly raises the REBCO’s temperature well above that of the surrounding cryogenic environment. This process, called annealing, heals defects and recovers some of the performance losses. Magnets are the limiting factor for tokamak …
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Life Cycle Optimization of a Zero Carbon Building for CO2e, Energy, and Cost Using Stochastic Controls for an Energy System Integrating a Heat Pump, Solar Air Wall, PV, and a Smart Grid-integrated Thermal Storage (SGTS) Hydronic Battery
… compared to a HP only, and by 61.8% compared to resistive heating. Using hourly grid pricing as a proxy of renewable friendliness, modelled optimization under a simulated dynamic pricing system by using hourly historic Alberta electrical pool pricing averaged over each month as a stochastic …
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Dissipative heating and nonthermal distributions in black hole accretion flaring events
… distribution) for electrons accelerated by resistive heating in reconnecting current sheets. This approach is well supported by the literature on the acceleration of electrons in magnetized plasma, which shows that current sheets do accelerate electrons and those electrons can have a …
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Detection of antiferromagnetic domain reversal in epitaxial insulating oxides
… magnetic switching arise from localized thermo-resistive heating and electromigration in the heavy metal. Secondly, we exploit the weak ferromagnetic nature of epitaxial hematite thin-films to directly control the antiferromagnetic sublattices with current pulses. To achieve this, we …
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DEVELOPMENT OF A MICROSCALE ELECTROCHEMICAL PLATFORM FOR THE ANALYSIS OF THERMAL PROFILES OF IMMOBILIZED DNA SECONDARY STRUCTURES
… a platinum resistance thermometer (PRT) and as a resistive microheater. The device assembly as well as automation of the temperature control and electrochemical methods have been instituted to increase measurement repeatability with the microscale device. The operational program was developed with …
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Entrained Air-Void System For Durable Highway Concrete
… of a refrigerant-based cooling system and resistive heating elements. These units are easily repaired by conventionally trained heating and air conditioning technicians and economically modified using readily available controls. Consequently, proposed factors and modifications to the test …
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