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A team of researchers at the Technical University of Denmark (DTU) and Delft University of Technology (TU Delft) has developed a new method for generating stress adapted orthotropic infill for 3D printing.
Topology optimization is recognized as an important design method for exploiting the manufacturing flexibility offered by 3D printing. It optimizes the distribution of a limited amount of material in a prescribed design space, in order to achieve the optimal structural performance.
Researchers - Method - Structure - Structure - Infill
Previously researchers developed a novel method to design bone-like structure, and even optimize the structure and infill simultaneously. The optimized structures with porous infill have demonstrated remarkable structural performance, regarding stiffness and buckling.
In their latest work, the researchers significantly improved the computational performance, bringing the method one step closer to widespread use in the 3D printing industry. Rather than performing finite element analysis and numerical optimization on the fine structural details, which is computationally intensive, the researchers propose to embed the fine geometric details in a coarse scale analysis via numerical homogenization, then optimize structure on the coarse scale, and finally project optimized results from the coarse scale onto the fine scale. This reduces the computational cost by at least one order of magnitude.
Method - Aligns - Infill - Patterns - Stress
The developed method aligns orthotropic infill patterns with the principal stress directions. A reduction in computational cost of at least one order of magnitude is achieved compared to density-based optimization of...
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