A5009419921- Additive Manufacturing and 3D Printing Technologies
- Manufacturing Process and Optimization
- 3D Shape Modeling and Analysis
- Advanced Materials and Mechanics
- Innovations in Concrete and Construction Materials
- Cellular and Composite Structures
- Computer Graphics and Visualization Techniques
- Interactive and Immersive Displays
- Additive Manufacturing Materials and Processes
- Engineering Applied Research
- Material Properties and Processing
- Injection Molding Process and Properties
Delft University of Technology
2018-2021
3D printing techniques such as Fused Deposition Modeling (FDM) have enabled the fabrication of complex geometry quickly and cheaply. Objects are produced by filling (a portion of) 2D polygons consecutive layers with contour-parallel extrusion toolpaths. Uniform width toolpaths consisting inward offsets from outline produce over- underfill regions in center shape, which especially detrimental to mechanical performance thin parts. In order fill shapes arbitrary diameter densely require...
In most layered additive manufacturing processes, a tool solidifies or deposits material while following pre-planned trajectories to form solid beads. Many interesting problems arise in this context, among which one concerns the planning of for filling planar shape as densely possible. This is problem we tackle present paper. Recent works have shown that allowing bead width vary along helps increase density. We novel technique that, given deposition range, constructs set closed beads whose...
Material Extrusion (MEX) systems with dual-material capability can unlock interesting applications where flexible and rigid materials are combined. When chemically incompatible concerned the adhesion between two might be insufficient. Therefore researchers typically rely on dovetail type interlocking geometries in order to affix bodies mechanically. However, introduces extrusion discontinuities relies material's resistance deformation, which is difficult model. We propose a simple effective...
This work presents halftoning techniques to manufacture 3D objects with the appearance of full grayscale imagery for Fused Deposition Modeling (FDM) printers. While droplet-based dithering is a common technique, this not applicable FDM printing, since builds up by extruding material in semicontinuous paths. A set three methods presented which apply linear principle called 'hatching' horizontal, vertical and diagonal surfaces. These are better suited compared other methods: their...
The fabrication flexibility of 3D printing has sparked a lot interest in designing structures with spatially graded material properties. In this paper, we propose new type density structure that is particularly designed for systems based on filament extrusion. order to ensure high-quality results, extrusion-based requires not only the are self-supporting, but also extrusion toolpaths continuous and free self-overlap. proposed called CrossFill, complies these requirements. particular,...
3D printing techniques such as Fused Deposition Modeling (FDM) have enabled the fabrication of complex geometry quickly and cheaply. High stiffness parts are produced by filling 2D polygons consecutive layers with contour-parallel extrusion toolpaths. Uniform width toolpaths consisting inward offsets from outline produce over- underfill regions in center shape, which especially detrimental to mechanical performance thin parts. In order fill shapes arbitrary diameter densely require adaptive...