Projektdaten

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Ein neuartiges Design für die additive Herstellung von aperiodischen zellulären Mikroarchitekturen, inspiriert von polykristallines Korngrenzennetzwerk basierend auf der Mehrphasenfeldmethode

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Additive manufactured aperiodic cellular microarchitectures can deliver prescribed variations in local stiffness/compliance in accordance with the local relative density/porosity. They are mostly designed by Voronoi-type algorithms as a purely mathematical tool with no rigorous consideration of physics. For enhanced stiffness and strength in cellular structures, the force is to be transmitted efficiently throughout the struts. For uniform strut thickness, the struts are to ideally transmit identical axial forces; a requirement that translates into equal angles at strut junctions. To this end, we are inspired by the polycrystalline grain boundary network of an ideal microstructure with isotropic grain boundary energy produced by the multi-phase filed method. Considering grain boundary segments as struts and grain interiors as voids, a cellular structure is designed for 3D printing. Finite element simulations and 3D printing prototyping are employed to analyze and demonstrate the enhanced stiffness and strength of the proposed novel design over the traditional Voronoi-type designs.