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Creators/Authors contains: "Quezada, Bryan"

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  1. ; ; ; (, The University of Texas at Austin - Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference)
    In the composite manufacturing industry, production tooling commonly requires preheating for molding. The most commonly used method for preheating is indirect heating, in which heat is transferred from heat sources to the materials by convection and radiation. However, in the case of direct heating, in which heat is generated directly within a material by passing an electric current through it, the tools are preheated through joule heating. In this project, we manufactured a self- heating mold for direct heating. The manufacturing process involves 3D printing self-heating tooling, in which resistive wires are embedded into the tool at every so number of layers using a programmed 3D printer. Thermal characterizations were performed on the self-heating tool and a thermoset composite layup process was performed to study the suitability of the mold. 
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  2. ; ; ; (, The University of Texas at Austin - Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference)
    This research evaluates and characterizes the thermal and physical characteristics of thermoplastic specimens embedded with resistive wire using a Fused Filament Fabrication 3D printer. The specimens were manufactured through a novel approach “Pause and Go” in additive manufacturing for embedding resistive wires into a 3D printed thermoplastic substrate using a custom-built wire embedding tool integrated into a commercially available desktop scale Independent Dual Extruder (IDEX) printer. Wire- embedded test specimens were produced via 3D printing using Polylactic Acid. The 26-gauge nichrome wire was embedded in the top substrate and continued the printing to fully embed the wires. Thermal testing was carried out and observed steady-state temperatures after 30 minutes. The wire pulls tests characterized the bonding strength of the wire and substrate. 
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