China3D printingNet, July 11, the leading university Zurich Federal Institute of Technology continues to emerge with many fascinating projects, which are the source of prolific research in scientific research and technological exploration (such as 3D and 4D printing). Scientists there have provided continuous and insightful attention to the gradual use of construction, construction, and materials such as cement, and even sand and metal.ETH Zurich’s efforts to advance in complex design and digital construction technology are well known. In addition, a recent project outlines the use of3D printingDevelopment of eggshell method for ultra-thin frame.
Now, the latest news highlights the “planting” of the “tree of the future” pavilion, which is a further result of the paper “Eggshells: Ultra-thin 3D Printing Templates for Concrete Structures” published by the research.This elegant building is about 7 feet tall and combines all the advantages of previous work at ETH Zurich, through robotics and3D printingDemonstrated their knowledge in design and materials.
Side view of the pavilion (photo courtesy of ©gramazio kohler research, ETH Zurich)
The Basler and Hofmann design teams collaborated on the pilot project, describing it as a pilot project for parametric planning:
The design team said: “The stem of the future tree is a reinforced concrete column,3D printing, And filled with custom-developed quick-hardening concrete. This novel manufacturing process is called “egg shell”, which can manufacture non-standard, structurally optimized concrete structures, while being able to integrate standard steel bars and minimize formwork waste. Eggshell process using Fused Deposition Modeling (FDM)3D printingIn order to achieve a broad design and manufacturing space. “
The powerful template is integrated by a large printer equipped with a six-axis robotic arm3D printingAs one piece, the construction volume of the six-arm manipulator is 1.2×1.2×3.6 m. Use a 1.5 mm nozzle and standard filament to extrude through the end of the arm. Issues such as shrinkage pose challenges for designers. They solve the problem by using diamond-shaped micropatterns on the template to reduce stress and provide better material stiffness. One of the biggest advantages of eggshell printing is the ability to use stencils with a thickness of less than 1.5 mm using the Smart Dynamic Casting (SDC) method created by ETH Zurich.
The design team said: “In this way, the pressure on the template can be reduced to a minimum, and an 8 kg template can be used to make an 800 kg cylinder.”
In fine weather, the mutual frames cast shadow patterns on the ground (Image courtesy of gramazio kohler research, ETH Zurich)
The canopy covers an area of 1,152 square feet (or more than 107 square meters) and is composed of 380 acetylated wood elements with screws. It is fixed on both sides of the building and is located on concrete pillars.
The designer said: “Here, affected by the behavior of the frame structure, the honeycomb pattern gradually shifts between hexagons and triangles to achieve different levels of flexural rigidity in different areas of the frame.
“The increasingly triangular configuration at the corners of the cantilever makes the area harder and locally reduces structural deformation.”
Close-up of the top of the column at the interface of the wooden structure (Image courtesy of ©Basler&Hofmann AG)
China3D printingNet Comments: This complex design is the result of a complex calculation model that leads the designer to the final geometry and evaluation of the tree. The structure is described with an algorithm that allows programming to ensure the stability and feasibility of the architecture.
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