A. James Clark School of Engineering
Permanent URI for this communityhttp://hdl.handle.net/1903/1654
The collections in this community comprise faculty research works, as well as graduate theses and dissertations.
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Item Investigation into the Influence of Build Parameters on Failure of 3D Printed Parts(2016) Fornasini, Giacomo; Schmidt, Linda C; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)Additive manufacturing, including fused deposition modeling (FDM), is transforming the built world and engineering education. Deep understanding of parts created through FDM technology has lagged behind its adoption in home, work, and academic environments. Properties of parts created from bulk materials through traditional manufacturing are understood well enough to accurately predict their behavior through analytical models. Unfortunately, Additive Manufacturing (AM) process parameters create anisotropy on a scale that fundamentally affects the part properties. Understanding AM process parameters (implemented by program algorithms called slicers) is necessary to predict part behavior. Investigating algorithms controlling print parameters (slicers) revealed stark differences between the generation of part layers. In this work, tensile testing experiments, including a full factorial design, determined that three key factors, width, thickness, infill density, and their interactions, significantly affect the tensile properties of 3D printed test samples.Item PROPOSED BUILD GUIDELINES FOR USE IN FUSED DEPOSITION MODELING TO REDUCE BUILD TIME AND MATERIAL VOLUME(2009) Teitelbaum, Gregory Allen; Schmidt, Linda C; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)The emergence of Fused Deposition Modeling as a small volume manufacturing process and a lack of explicit rules for improving the efficiency of this process bring necessity to the development of build guidelines. This work develops a proposed set of build guidelines for use in Fused Deposition Modeling (FDM). The guidelines are verified by the literature and experience, and validated by statistical analysis of quantitative FDM build data and qualitative review of example cases from student projects. The experimental data are obtained using the fabrication protocol for a Dimension SST Fused Deposition Modeling machine. Using simulation software known as CatalystTM, build time and material volume characteristics of many components of varying size and complexity were calculated. Eventually, this area of research should result in a robust set of rules that can fundamentally reduce the costs associated with FDM and can assist its ascent as a feasible full-scale manufacturing process.