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 22 for “"3-D printing"”.
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Fluid damping with elastic medium in 3-D printing process
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Additive manufacturing (3 D printing) : challenges and opportunities for large scale adoption
3D printing (additive manufacturing) has been around for more than 30 years. A lot of technological progress has been made in that time, most recently with new innovations such as metal 3D printing. Although the technology seems to hold a lot of promise, the rate of adoption has not lived up to the …
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Effect of print orientation on mechanical material behavior in fused deposition modeling 3-D printing
Additive manufacturing, also known as 3-D printing, has in recent years experienced a meteoric rise in relevance and application that has seen the technology be used in wide range of industries, from aerospace to construction to healthcare. However, many of the methods used for 3-D printing, such …
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Exploration of metal 3-D printing technologies for the microfabrication of freeform, finely featured, mesoscaled structures
This thesis investigates a mainstream metal 3-D printing technique (i.e., direct metal laser sintering of stainless steel {SS} 316L) and two relatively new metal additive manufacturing methods (i.e., lost-wax casting of sterling silver using stereolithography-printed wax masters, and binder inkjet …
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3-D Printing, Characterizing and Evaluating the Mechanical Properties of 316L Stainless Steel Materials with Gradient Microstructure
… a gradient in their microstructure. During 3D printing, the gradient in the microstructure is created by tailoring the processing parameters (hatch spacing, scanning speed, and laser power and scanning speed) of the Selective Laser Melting (SLM). The Materials with Graded Microstructure (MGMs) …
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Ultra-rapid 2-D and 3-D laser microprinting of proteins
… engineers have developed several methods for printing two- and three-dimensional patterns of proteins for studying and directing cell development. Of these methods, laser microprinting of proteins has shown the most promise for printing sub-cellular resolution gradients of cues, but the …
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Direct-write assembly of colloidal materials
… with the versatility of direct-write 3-D printing. Direct-write assembly is performed by precision dispense of a colloidal suspension from a fine needle into a temperature-controlled environment.
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Design of a bead holder for thermal atherosclerosis sensor
… also consider fabrication alternatives to 3-D printing such as injection molding.
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The design of an educational tool for visualizing freedom and constraint topologies
… were solid modeled with the intention of 3-D printing them.
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Additive manufacturing of novel metal microwave components for space application
… Manufacturing (AM). The design freedom of 3-D printing allows passive components to have various advantages, such as enhanced performance, reduced weight and size, integrated different functions, part consolida tion, and elimination of assembly over traditionally manufactured devices. The ben …
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Reinforcement of Hydrogels via Polyacrylic Acid Nanoparticles Induced Calcium Carbonate Crystallization
… not limited to, pharmaceuticals, cosmetics, 3-D printing, and biomedical applications. However, hydrogels can inherently be soft and brittle. Many hydrogel materials suffer from poor compressive resilience and an inability to stretch without breaking. The ability to produce stronger more …
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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
… rapid and low-cost manufacturing ability of 3-D printing, inexpensive materials can be quickly produced that lower the risk of viral transmission.
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Analysis, Design and Testing of a Wind Tunnel Model to Validate Fiber-Optic Shape Sensing Systems
… model was constructed at Virginia Tech using 3-D printing techniques for the fuselage and foam and fiberglass for the wings. On the bottom surface of the wings the Luna Technologies Inc. fiber optic shape sensing fiber was bonded along the leading and tailing edges. The swept-wing test article was …
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Towards simultaneous single emission microscopy and magnetic resonance imaging
… on a non-metal gantry constructed with 3-D printing using nylon powder material. This compact system can work as a “low-cost” desktop ultrahigh resolution SPECT system. It can also be directly operated inside an MR scanner. Accurate system geometrical calibration and corresponding image …
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Modeling fresh behavior of cement-based materials for 3-D concrete printing
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Viscoplastic Study of 3D Printed Carbon Fiber Composites
… made composites as the fused deposition in printing alters the material properties. In order to understand the effects of the printed fiber orientation on the viscoplastic response, four different configurations were to be tested: 0ᴼ, 45ᴼ, 90ᴼ, and a mixed 0ᴼ/45ᴼ/90ᴼ laminate. The model that …
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Less-Than-Lethal Self Defense Device with an Acoustic Element
<p>This creative capstone project involves the conception, design, and creation of a less-than-lethal self defense device with an integrated sound board to control the acoustic element. Theoretically, this device is capable of deterring potential threats without causing any serious harm or any …
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Analysis and design of rapid prototyped mechanisms using hybrid flexural pivots
… and molding (for high volume production) or 3-D printing (for custom, one-off systems) for manufacturing the mechanism structures/skeletons and ii) inserts of simple geometry with specialized materials (e.g. spring steel, etc.) to get the right material properties where need it. The objective of …
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