Architectural models have long been a staple application of 3D printing processes, for producing accurate demonstration models of an architect’s vision. […]

More recently some visionary architects are looking to 3D printing as a direct construction method […]

3D printed concrete structures have been appearing all over World. In 2016 the Institute for Advanced Architecture of Catalonia (IAAC) 3D printed a prefabricated concrete bridge over a river, and since then, firms such as AMT-SPETSAVIA have successfully 3D printed concrete houses. […]

Unlike conventional concrete construction processes, concrete 3D printing does not allow lower layers to dry before another one is deposited over it. This can result in a wall buckling or collapsing, like poorly-thrown clay on a potter’s wheel.

[…]TU Eindhoven’s Prof. Akke Suiker has come up with a series of equations that address two types of failure in 3D printed concrete structures, namely elastic buckling and plastic collapse.

[…] As part of his working, Suiker derived a buckling model of a wall structure from an equilibrium equation and a mathematically defined boundary conditions of the 3D printed concrete. The speed of 3D printing the concrete and the process of the concrete drying were then factored in to determine the conditions under which a 3D printed concrete wall will fail.

[…]Additionally, the model shows how to make the structure with as little material as possible, the influence of structural irregularities the effect of making wall slightly thicker, and the impact of increasing the material curing rate.

The models can be applied to FFF 3D printing with completely different materials, with an insight into whether a buckling or plastic collapse failure is localized or will also affect the rest of the connecting structure.

Mechanical performance of wall structures in 3D printing processes: Theory, design tools and experiments

Article from 3dprintedindustry.com

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