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 20 for “"3-D printed"”.
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Economical furnace processing for 3-D printed metal parts
Three-Dimensional Printing is a layer based manufacturing process which uses powdered material to build parts with complicated geometries directly from a 3-D computer model. Metal parts fabricated by this method are initially held together with a polymer binder and are somewhat fragile. To achieve …
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Accuracy of Implants Placed with Surgical Guides: Thermoplastic vs. 3-D Printed
… implant surgery materials: thermoplastic vs. 3-D printed surgical guides. <strong>Materials and Methods</strong>:Twenty duplicate mandibular models, ten thermoplastic and ten 3-D printed surgical guides were used. Twenty implants were placed following the guided surgery protocol. Cone beam …
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Monolithically 3-D Printed, Quadrupole Mass Filter for High-Precision, Compact, CubeSat Mass Spectrometry
… characterization of the first, monolithically 3Dprinted, hyperbolic, compact RF quadrupole mass filters. The devices were made using an advanced, multi-material extrusion printer. The devices are tested as RFonly collision cells for use in miniaturized triple quadrupole mass spectrometers and as …
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The Effect of the Incorporation of Heavy Metal Zeolites into 3-D Printed Surgical Guide Resin on the Surface Stability of SARS-CoV-2
… of heavy metal zeolites integrated into 3-D printed surgical grade resin (SGR). Data were collected using virus plaque assays and luminescent assays to determine the amount of infectious virus present at designated time points. The collected data were analyzed by GraphPad Prism 9 software. …
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Design and Analysis of the Impact Diffusion Helmet Through a Finite Element Analysis Approach
… an impact reduction perspective. Finally, a 3-D printed experimental helmet was impact tested and compared to a 3-D printed control helmet. The experimental helmet brought the channels back into the impact zone in order to judge if they had a physical effect on the acceleration. Both the …
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Development of an Quadcopter Unmanned Aerial Vehicle for Atmospheric Remote Sensing
… and PM2.5 particulate matter quantities. A 3-D printed drone body is designed and flight tuning is performed. An optimal length for an upward extending mast for the drone body is determined. Low cost, lightweight sensors are compared against higher precision sensors in both static and dynamic …
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Design of a morphing airfoil exhibiting bi-stability using topology optimization
… results obtained numerically are then 3-D printed to evaluate their performance characteristics.
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Single Degree of Freedom Solid Rotor Velocity Control Induction Drive
… houses the stator and is supported by a 3D-printed polylactic acid (PLA) enclosure. The wiring is initially connected in wye configuration without a neutral wire but later converted to three independent phases, each with its own input and output wire. The teeth have a nominal air gap of …
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Development of a low-cost high-impact resistant compliant myoelectric prosthetic hand
… compliant finger and palm that enables the 3-D printed low-cost prosthetic hand to be impact resistant. This fabrication process and hand design enables the development of the prosthetic hand to be low-cost, light-weight, and easy to assemble and reproducible. Results from free-end and fixed-end …
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Experimental and Computational Analysis of a 3D Printed Wing Structure
… validation tool of the software. Initially, a 3D printed prototype of the wing is validated against static deformation tests as well as dynamic Ground Vibration Tests (GVT). The developed model is compared against the commercial software Nastran/Patran. Further plans include experimental …
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Rapid 3-D laser microprinting of bioscaffolds and patterning of proteins
… on the biological activity and functions of printed scaffolds and printed proteins. First, we constructed branched collagen microchannels containing microprinted patterns of P-selectin, a protein involved in leukocyte recruitment from blood vessels. We showed that leukocyte rolling occurred …
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Micromechanical Behavior of Fiber-Reinforced Composites using Finite Element Simulation and Deep Learning
… experimental results of a recently developed 3-D printed aligned discontinuous carbon fiber-reinforced composite as the composite of interest. The framework was then utilized to investigate the impacts of a few parameters of the constitutive equations on the strength and failure pattern of the …
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Design and Analysis of Quasioptical Components for use in Terahertz Optics and Future CMB Missions
… the design, manufacturing and analysis of a 3-D printed PLA GRIN lens designed to focus W-band radiation (75-110 GHz) 250 mm from the lens. For this, a commercial package known as CST microwave was used to analyse the refracted radiation. The simulated radiation was also compared with GBM …
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Incisal Endodontics Access vs Traditional Palatal Access to Negotiate Simulated Obliterated Canals Using Guided Endodontic Techniques
… be successful in accurately negotiating these 3D printed teeth with simulated PCO, however, the difference in accuracy between the traditional palatal access compared to a conservative incisal access is not yet known. Objective: This in vitro study compares GEA stents designed with an incisal …
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Rethinking Plant-Based Materials Production: Selective Growth of Tunable Materials Using Cell Culture Techniques
… and microstructural characterization of 3-D printed, lab-grown plant materials and demonstrates material tunability with simple adjustments to culture conditions (e.g., hormone levels). Grown material properties vary significantly with hormone levels of the nutrient medium. The storage …
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Comparison of guided endodontic access with and without pin fixation in 3D printed teeth with simulated pulp canal obliteration
… tooth #8 with PCO. Materials and Methods: A 3-D printed maxillary model of an anonymous patient had a GEA stent designed using coDiagnonstiX software. The stent extended from tooth #3 to tooth #14 with the guide sleeve over tooth #8. Tooth #8 with no calcification, calcification to the cervical …
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Two-dimensional Mapping of Interface Thermal Resistance by Transient Thermal Impedance Measurement
… The sensor was also well protected with a 3-d printed fixture. Then the edge effect was investigated, indicating the application of the thermal sensor is suitable for samples thinner than the value in TABLE 2 3. The working principle of the movable thermal sensor – Zth measurement and its …
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Microscale biosensors for HIV detection and viral load determination
… integrate with the microchip setup using a 3-D printed platform. Results from our smartphone-imaged RT-LAMP technique show amplification in reactions containing as few as 3 virus particles per droplet, corresponding to 670 viruses per microliter of whole blood [5]. The true power of this …
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Flow distribution in brazed plate heat exchangers
… of the BPHEs is then accomplished through a 3-D printed transparent window. The observed flow regimes in the inlet header are periodic and three stages are identified in one cycle: top corner vapor flow, vapor jet flow, and liquid blockage. Among them, the top corner vapor flow affects the …