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 40 for “"Printing parameters"”.
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Effect of Printing Parameters on the Structure and Properties of 316l Stainless Steel
The emergence of 3D-printing provides the flexibility of 316L stainless steel alloy parts for various structural applications. Although several studies have been done on the effect of parameters on structure and properties, little attention has been paid to the high-strain rate deformation …
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An Investigation into composite additive manufacturing of dynamic response paediatric prosthetic ankle-foot devices
… A parametric study examined how different printing parameters, such as fibre layers, layer distribution, wall layers, and fill patterns, affect mechanical performance. Results showed that increasing fibre reinforcement significantly improved stiffness and energy return, key characteristics …
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Part removal of 3D printed parts
… performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D printing using a patent pending, New Valence Robotics Corporation technology for automated part removal of 3D printed parts. …
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A 2nd generation electrohydrodynamic jet (e-jet) printing system, parametric studies of e-jet nozzles and integrated electrode e-jet deposition
As electrohydrodynamic jet (e-jet) printing technology developments have increased in magnitude over the past few years, a low-cost and user friendly, high-resolution desktop system was developed at the University of Illinois at Urbana-Champaign. The original desktop system provided great …
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Formulation of oral dosage forms by three dimensional printing
… freeform fabrication known as three dimensional printingTM (3DPTM). A microcrystalline cellulose powder was used in combination with pH-dependent and permeable polymeric binder solutions. Release studies in acidic media were performed using both dye and drug (antihistamine) as actives. Deposition …
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The effects of layer deposition angle and layer temperature on the orthotropic mechanical properties of 3D printed PLA parts
… parts are strongly affected by the specific printing parameters. Previous work in 3D printed PLA characterization under quasi-static tensile loading has focused on the effect of build-orientation and infill geometry. The present work focuses on the effect of layer temperature as controlled by …
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4D Printing Shape Memory Polymers for Biomedical Applications
<p>The development of 3D printing techniques using shape-memory polymers (SMPs) hascreated potentials for creating dynamic, three-dimensional structures that can be produced rapidly and be customized for specific and complex architectures. These qualities have made 3D printing a popular fabrication …
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Fabrication of complex oral drug delivery forms by Three Dimensional Printing (tm)
Three Dimensional Printing 3DPTM is a novel solid freeform fabrication technology that has been applied to the fabrication of complex pharmaceutical drug devices. Limitations of the technology as relating to pharmaceuticals have been addressed and prototype dosage forms have been fabricated. The …
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A Critical Review of Multi-Phase Materials and Optimization Strategies for Additive Printing Technologies
… this thesis is the critical review of Additive Printing (AP) or 3D-printing, and optimization strategies for the introduction of new materials. During the course of tenure, four classes of solids were investigated to determine the hurdles presented from each system. Specifically, the …
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Assessing the opportunity to produce Nitinol medical device components using additive manufacturing
… labor-intensive. Additive manufacturing, or 3D printing, offers a tantalizing alternative to the status quo of Nitinol manufacturing as the desired part can be printed to shape, greatly simplifying the operations and cost of producing medical device components. Working with Boston Scientific in …
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On Demand Liquid Metal Programming for Composite Property Tuning
… In this thesis, we present a method of printing highly tunable flexible and stretchable composites consisting of elastomers with liquid metal (LM) inclusions. We analyze the mechanical and functional behaviors and highlight the anisotropic properties that can be created via our printing …
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Quality Monitoring of 3D Printed Scaffold
As the utilization of the technology of 3D printing continues to grow in various industries, the need for quality monitoring has become increasingly important as early detection of errors in the printing process can help save time and prevent wastage of resources and labor. The process of printing …
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STRATEGIES TO IMPROVE SHRINKAGE RESISTANCE OF CEMENT-BASED MATERIALS FOR EXTRUSION-BASED 3D PRINTING
… out to: i) identify key material and processing parameters that affect printability; ii) investigate the influence of water-to-cement ratio, superplasticizer dosage, and welan gum content on mortar printability; iii) propose a “printability window” where rheological properties and desorptivity …
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Deep learning enabled error detection and correction for 3D printing
3D printing has become a substantial part of the engineering toolbox. The technology offers vast opportunities across fields because it can make almost any geometry out of almost any material. However, many applications remain at the research-stage because printers are vulnerable to errors. …
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Inkjet printing: technique and applications for organic electronic devices
… transistors and sensors. Among them, Inkjet Printing is a promising technique which exploits all the advantages of organic materials, such as low-cost and solution processability, and allows the large-scale automated fabrication of large area devices. This thesis describes the work carried …
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Investigation of a heirarchical collagen scaffold/3D printed lattice structure designed for use in total knee replacements
… osseointegration. To understand the effects of printing parameters on the structure and properties of prepared samples, the bonds formed between FDM printed rasters were explored. Samples printed from poly lactic acid (PLA) and PEKK polymers were investigated. X-ray microtomography provided …
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In-Situ Monitoring and Simulations of the Non-Isothermal Crystallization of FFF Printed Materials
… and significant fluctuations in pressure, during printing and while idle, of ± 2 °C and +/-14 kPa. These deviations were eliminated at lower flow rates with a properly calibrated proportional–integral–derivative (PID) system. At high flow rates, drops in temperature as high as 6.5 °C were observed …
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Towards Advancement of Continuous Fiber Composite Additive Manufacturing
… frequently. However, contributions from the printing process to the “printed” material properties are often overlooked, which are of critical importance to material reliability and aerospace applications. In this effort the printability, material property variability and potential …
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Printing protein-engineered paper for biosensors
… This thesis explores whether introducing digital printing into papermaking in combination with the recombinant protein production of paper-binding bioreagents could provide an accessible, scalable tool for the fabrication of affordable paper-based microfluidic biosensors with customised and …
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Additive Manufacturing of Copper via Binder Jetting of Copper Nanoparticle Inks
… for determining material compatibility and printing parameters in binder jetting.
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