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Showing 1 to 20 of 214 for “"additive manufacturing (AM)"”.
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Inspection & modelling of cusp geometry in additive manufacturing to predict product’s surface roughness
… have been the major problems in employing Additive Manufacturing (AM) technologies. Most of commonly used Additive manufacturing (AM) technologies are developed based on a layer-based manufacturing process to fabricate 3D models. However, a critical drawback that reduces the surface quality …
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Residual stress measurement and structural integrity evaluation of SLM Ti-6Al-4V
… pressure on material capabilities and the manufacturing systems. The next generation of manufacturing methodologies are being developed in the Additive Manufacturing (AM) arena from which Selective Laser Melting (SLM) has emerged as a promising candidate for producing highly complex …
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Manufacture and Characterization of Additively Manufactured Ceramic Electromagnetic Structures
Additive Manufacturing (AM, also known as 3D printing) can produce novel three-dimensional structures using low-loss dielectric materials. This enables the construction of dielectrics with complex shapes that enable innovative microwave applications such as resonators, filters, and metamaterial …
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NAVY ADDITIVE MANUFACTURING AFLOAT, DATA SECURITY ANALYSIS
The integrity of additive manufacturing (AM) schematics is currently an open question for AM systems installed onboard U.S. Navy ships. Additionally, there are several possible entry points that exist in the AM toolchain that provide hackers with numerous opportunities to corrupt valuable data. …
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Naval additive manufacturing : bridging the gap between research and implementation
Additive manufacturing (AM), commonly known as three-dimensional printing, presents numerous advantages over traditional production methods, including design-to-end-use process reduction and on-demand generation of needed parts. While some companies have recently been founded with AM as their …
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Design of nylon-carbon fiber composite gears
Advances in manufacturing and material science have changed fundamental limitations of designs and have allowed designers to redesign components to improve performance characteristics. This work applies traditional gearing standards from the American Gear Manufacturers Association (AGMA) to a …
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A thermally-driven design methodology for large-scale polymer additive manufacturing systems
The extrusion additive manufacturing (AM) process involves selectively dispensing melted material out of a nozzle onto a build platform to form a layer, moving the build platform down, and extruding the next layer. The strength of polymer welds between layers of extrusion AM parts is lower than the …
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Customized topology optimization for additive manufacturing
One of the biggest limitations of additive manufacturing (AM) is the resulting production times. Due to the layer-based method of material deposition, the time to produce a single part is substantial compared to techniques like injection molding or casting. However, the level of part complexity …
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Finite element analysis of additive manufacturing of polymers using selective laser sintering, challenges and potentials
Additive manufacturing (AM) is experiencing widespread adoption in many sectors including aerospace and biomedical. Multiple Finite Analysis (FA) software packages have proved effective in predicting and minimizing distortion and warping, but their capability in predicting the resultant mechanical …
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Modelling material behavior for additively manufactured metals and polymers produced by fused filament fabrication
Additive Manufacturing (AM) has several applications across diverse industries, such as automotive, aerospace, and medical sectors. Fused Filament Fabrication (FFF) stands out as a prominent AM technique that builds the product layer by layer. Metal Fused Filament Fabrication (MFFF) employs a …
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Determining thermal properties via parameter estimation of a one-dimensional, analytical model
… thermal conductivity that deliver the same accuracy as the existing ASTM standards and are easier to implement. The methods account for losses in the heating to enable a better estimation of thermal conductivity. This research is directly applicable to estimating the thermal conductivity …
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The Design for Manufacturing and Assembly Analysis and Redesign of an Aircraft Refueling Door Hinge Utilizing Additive Manufacturing
… aircraft door hinge assembly provided by Gulfstream Aerospace was analyzed following an established process called DFMA. The hinge was then redesigned to be additively manufactured, which is uncommon currently in industry for load bearing components. It was shown that the Design for Manufacturing …
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Manufacturing Strain Sensor Via Printed Electronics Onto 3D Printed Substrates
… fabricate a strain gauge sensor. We use various additive manufacturing (AM) techniques including 3D fused filament fabrication (FFF) printing, extrusion printing, and inkjet printing. We used silver nanoparticle ink and studied different conditions to maximize electrical conductivity of the ink. …
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Development of a layerless additive manufacturing stereolithography machine to improve surface quality and dimensional accuracy
Stereolithography (SLA) is an Additive Manufacturing (AM) process that has recently gained significant popularity in manufacturing research. The material used in SLA is a photocurable resin. SLA fabrication has conventionally been executed in a layered build process, which results in the staircase …
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Formulation of uv curable resins utilized in vat photo polymerization for the additive manufacturing of gun propulsion charge in 3d printers
Formulating resins for Additive Manufacturing (AM), utilizing UV laser stereolithography, is a new technique that makes it possible for the fabrication of complex geometries with high dimensional resolution. This layer by layer photopolymerization approach spans various industrial sectors from …
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Development of in-situ radiometric inspection methods for quality assurance in laser powder bed fusion
<p>“Laser Powder Bed Fusion (LPBF) metal Additive Manufacturing (AM) fabricates 3D metal parts layer-by-layer. The process enables production of geometrically complex parts that are difficult to inspect with traditional methods. The LPBF parts experience significant geometry driven thermal …
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Comparison of Additively Manufactured and Wrought 17-4 PH Stainless Steels in Ultra Low Cycle Fatigue
<p>Additive manufacturing (AM) processes allow for creation of complex geometries that are otherwise impractical to fabricate with traditional subtractive methods. AM technology has potential to improve the optimization of seismic lateral force resisting components which dissipate seismic energy …
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Design and Commissioning of a Hybrid Additive Manufacturing System Combining Inkjet Deposition and Laser Powder Bed Fusion
Capabilities to combine multiple metal and/or ceramic materials in single components, and/or to achieve desired gradients in composition, will advance the performance of future propulsion and energy conversion systems. Multi-material and gradient capabilities have been demonstrated for metals in …
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Effect of 3D Architecture on Energy Dissipation during High-speed Particle Impact
Ultralight mechanical metamaterials enabled by additive manufacturing (AM) have previously achieved density-normalized strength and stiffness properties that are inaccessible to monolithic materials, but the majority of this work has focused on static loading while the mechanical properties of …
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Correlating Displacement Sensors and In-Situ Optical Imaging for the Layer Management in a Laser Powder Bed Fusion Process
Additive manufacturing (AM) allows for the creation of complex geometries that cannot be created with traditional manufacturing methods. The strategy of this project is to utilize various sensors in tandem with the camera available within the machine to manage the pertinent powder layer. This study …
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