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3D printing, or additive manufacturing, is the construction of a three-dimensional object from a CAD model or a digital 3D model. [1] [2] [3] It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, [4] with the material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer.
A bicycle bridge has been constructed in TU Eindhoven by printing segments that are post-tensioned using high-strength cables running perpendicular to the printing direction. [ 20 ] [ 21 ] The post-tensioning technology has a lot of potential as a reinforcement strategy in additively manufactured concrete systems.
Computer-aided design (CAD) model used for 3D printing. The manual modeling process of preparing geometric data for 3D computer graphics is similar to plastic arts such as sculpting. 3D scanning is a process of collecting digital data on the shape and appearance of a real object, creating a digital model based on it.
3D printing speed refers to only the build stage, a subcomponent of the entire 3D printing process. However, the entire process spans from pre-processing to post-processing stages. [ 7 ] The time required for printing a completed part from a data file (. stl or .obj ) is calculated as the sum of time for the following stages:
Stereolithography (SLA or SL; also known as vat photopolymerisation, [1] optical fabrication, photo-solidification, or resin printing) is a form of 3D printing technology used for creating models, prototypes, patterns, and production parts in a layer by layer fashion using photochemical processes by which light causes chemical monomers and ...
An analysis of 3D printing construction in remote areas [120] as an alternative to conventional construction reveals significant potential. 3D printing in construction offers innovative solutions to the unique challenges of these locations. The ability to use local materials, reduce waste, and adapt to complex and customized designs are just a ...
The proportion of these structures, known as 'infill density', is a key parameter that can be adjusted in the slicer. Support structure (in blue) generated by Cura software. Supports: Since most 3D printing processes build objects layer by layer, from the bottom up, each new layer is deposited directly on top of the previous one. Consequently ...
Figure 1: View of Drucker–Prager yield surface in 3D space of principal stresses for =, = The Drucker–Prager yield criterion [1] is a pressure-dependent model for determining whether a material has failed or undergone plastic yielding. The criterion was introduced to deal with the plastic deformation of soils.