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 “"Fused Deposition Modeling (FDM)"”.
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A comparative study of rapid prototyping systems
… Selective Laser Sintering (SLS), PolyJet, Fused Deposition Modeling (FDM), and 3D Printing (3DP) at the University of Missouri, Columbia. The results can be used as a preliminary guide to help users determine optimal strategies for rapid prototyping system selection.
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Investigation of Traditional and Alternate Living Hinge Designs for Fused Deposition Modeling Additive Manufacturing Process
… designs in the additive manufacturing process of fused deposition modeling. Initial research included comparing numerical and analytical linear analyses on a traditional living hinge design. The second research consisted of tensile testing for the material properties of the Acrylonitrile Butadiene …
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Mechanické vlastnosti velkorozměrových 3D tištěných dílů
… vůči podložce. Vzorky byly tištěny technologií Fused Deposition Modeling (FDM) na robotickém rameni KUKA KR8 R1620. Jejich tvar byl navržen tak, aby se eliminovaly koncentrace napětí vzniklé výrobou, dále byly vzorky testovány tahovou zkouškou. Nakonec proběhlo vzájemné porovnání maximální …
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Osteogenic and chondrogenic differentiation of rat bone marrow stromal cells in 3D culture with novel PCL-TCP scaffolds
… scaffolds. PCL-TCP scaffolds fabricated by fused deposition modeling (FDM), are honeycombed, highly reproducible bioresorbable 3D structures with a completely interconnected pore network and custom-tailored porosity and pore size. After expansion in vitro, BMSCs were enzymatically lifted and …
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Defextiles: 3D Printing Quasi Woven Textiles via Underextrusion
… to produce tulle-like fabrics on unmodified fused deposition modeling (FDM) printers. The under-extrusion of filament is a common cause of print failure, resulting in objects with periodic gap defects. In this paper, we demonstrate that these defects can be finely controlled to quickly print …
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High-throughput extrusion additive manufacturing using electrically resistive preheating
… additive manufacturing, commonly known as fused deposition modeling (FDM) or fused filament fabrication (FFF) is incredibly useful in industry for a variety of reasons, including rapid prototyping and the ability to create complex geometries easily. However, its further adoption is limited …
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Effect of print orientation on mechanical material behavior in fused deposition modeling 3-D printing
… of the methods used for 3-D printing, such as Fused Deposition Modeling (FDM), are layer-based processes, resulting in anisotropic material behavior of the printed object. Thus, the print orientation of the object is a crucial factor in its mechanical properties, such as strength and elastic …
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Fused Deposition Modeling of Composite Reinforced by Continuous Ultra-High Molecular Weight Polyethylene Fiber
Fused Deposition Modeling (FDM) of composites with compliant high-strength fibers couldexpand opportunities for the design and fabrication of complex compliant structures. However, this area of additive manufacturing (AM) is currently not reported in the open literature. This study pursued …
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Development of a biofidelic cranial bone surrogate using additive manufacturing
… were explored, including material jetting, fused deposition modeling (FDM), and stereolithography (SLA). Several materials were selected for investigation, with varying sample types for each material. Mechanical evaluation included both tensile and flexural testing. Porosity was introduced …
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Advancing sustainability in additive manufacturing: material formulation and process development for recycled PET and PET/HDPE blend
… to develop sustainable feedstock materials for Fused Deposition Modeling (FDM) and pellet-based 3D printing (or additive manufacturing-AM). Firstly, reactive chain extension was employed to enhance the rheological properties of r-PET, improving its melt strength, viscosity, and printability for …
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A parametric study of the repeatability of 3D printed LEGO®-like mechanical couplings
… design was printed out of ABS on an Afinia H480 Fused Deposition Modeling (FDM) printer and measured with a ZEISS MICURA Coordinate Measuring Machine. The accuracy of each coupling was determined by measuring the radial misalignment between the base and the top of the coupling, and the …
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DESIGNING MECHANICAL METAMATERIALS FOR INDUSTRIAL APPLICATIONS
… particularly Stereolithography (SLA) and Fused Deposition Modeling (FDM), in realizing complex metamaterial structures. Three significant industrial applications are presented: (1) a force-dispersing mechanical metamaterial for protective equipment developed in collaboration with Oberalp …
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Modelling, inspection, and post-processing of layer-based additive manufacturing surfaces to maintain product quality
… industrial services highly relies on appropriate modeling, inspection, and post-processing of the fabricated surfaces. A thorough investigation of surface roughness to improve surface quality of AM products is the focus of this thesis by developing methodologies to complete the three tasks of …
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Inspection & modelling of cusp geometry in additive manufacturing to predict product’s surface roughness
… case effect as a direct result of the layered deposition of the material. In this thesis, a new approach to model surface roughness in Fused Deposition Modeling (FDM) is proposed. Based on actual observations and modeling of the cusp geometry under various setups and fabrication conditions, an …
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Characterization of mechanical properties of fused deposition modeling manufactured polycarbonate composites
… polycarbonate composites manufactured by the Fused Deposition Modeling (FDM) method. The approach comprises of tensile testing of FDM manufactured samples following the ASTM D 638-03 and ASTM D 3039-00 standards. This gives the mechanical properties of either individual polycarbonate fibers or …
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High-throughput extrusion-based additive manufacturing
… to extrusion-based AM, commonly referred to as fused deposition modeling (FDM), and to demonstrate this understanding via the design and fabrication of a high-throughput extrusion AM platform. Three subsystems - the pinch wheel extruder, the conduction liquefier, and the open loop series gantry …
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The Effects of Processing Conditions on Thermoplastic Prototypes Reinforced with Thermotropic Liquid Crystalline Polymers
… composite materials suitable for use in fused deposition modeling (FDM). Polypropylene (PP) strands reinforced with continuous thermotropic liquid crystalline polymer (TLCP) fibrils were generated in a novel dual extruder process. Strands were then re-extruded to form short fiber …
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Indirect Tissue Scaffold Fabrication via Additive Manufacturing and Biomimetic Mineralization
… A four step fabrication process is explored: Fused Deposition Modeling (FDM) is used to fabricate scaffold patterns of varied pore size and geometry. Next, scaffold patterns are surface treated, and then mineralized via simulated body fluid (SBF); forming a bone-like ceramic throughout the …
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Quasi-Static Tensile and Fatigue Behavior of Extrusion Additive Manufactured ULTEM 9085
… performed on ULTEM 9085 samples fabricated by fused deposition modeling (FDM). First, tensile tests were conducted following ASTM D638 on three different build orientations with default build parameters to determine the mechanical strength of FDM ULTEM 9085 with those supplied by the vendor. …
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A study on extrusion of multiple material bonding for fused depostion modeling
Fused Deposition Modeling (FDM) is an additive manufacturing process by which a 3D object is created from plastic filament.Single extruder is commonly used nowadays,but there are several researcher in company had make a inovation to this technology which are the two extruder can print with two …
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