Generation of optimized voronoi based interior structures for improved mechanical properties

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2019

Author

Öncel, Anıl Can

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General design approaches are related with and inspired by natural examples. Since evolution itself pushes beings to their full potentials in the most efficient way, it is important for us to understand, observe and mimic the nature itself. In this study, naturally inspired internal structures are constructed by using hollow Voronoi cells and models are optimized to meet the design requirements. For this purpose, design volume firstly undergoes topology optimization with specific load and support conditions and the volume is divided into several density regions. Cell generation algorithm advances according to the average Von-Misses and principal stress values and deflections in these corresponding regions. The number of Voronoi sites in structurally critical regions is higher than other regions. Thus, the results of the optimization are reflected on the models. Since the Voronoi based interior has high porosity, the selected test models are manufactured via Fused Filament Fabrication process. The proposed approach is tested on several cases and the performance of the method is compared with respect to the cases having random Voronoi site distributions and regular infill patterns. According to the test results, strength-to-weight ratios of the tested artefacts are enhanced.

Subject Keywords

Additive manufacturing., Additive Manufacturing, Voronoi Cells, Topology Optimization.

URI

http://etd.lib.metu.edu.tr/upload/12624177/index.pdf
https://hdl.handle.net/11511/44203

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. C. Öncel, “Generation of optimized voronoi based interior structures for improved mechanical properties,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Mechanical Engineering., Middle East Technical University, 2019.