Compact representation and generative design of Voronoi based 3D internal structures using 2D Slices in additive manufacturing

Date

2024-1-25

Author

Aşık, Onat

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This study introduces a novel method for the efficient modeling, compact representation and additive manufacturing of 3D Voronoi based internal structures, utilizing 2D Voronoi slices. This innovative approach is underpinned by a newly proposed data format and a generative design methodology. The developed data format significantly reduces manufacturing data size for various geometries, offering a notable improvement over traditional data formats. The proposed method is engineered to process boundary representation data, alongside input parameters such as offset amount, Voronoi seed count, and their spatial distribution. It efficiently generates 2D Voronoi slices and NC files suitable for the Material Extrusion type Additive Manufacturing processes, leading to the successful fabrication of the output geometry. To construct 3D Voronoi structures from these 2D slices, the study introduces an innovative offsetting technique. This technique is based on the unique characteristics of the Weighted Voronoi Diagrams (also referred to as Power Diagrams) applied layer by layer. As part of this approach, new Voronoi seeds were strategically integrated to ensure a consistent Voronoi-to-Area ratio across the designated layers and coordinates. A significant outcome of this developed method is the elimination of overhang and the need for support structures in the fabrication of 3D Voronoi structures, achieved through the controlled application of the offset parameter.

Subject Keywords

Generative Design, Additive Manufacturing, Voronoi Diagrams, Compact Representation, Data Size Reduction

URI

https://hdl.handle.net/11511/108427

Collections

Graduate School of Natural and Applied Sciences, Thesis