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Variable Density Filling Algorithm Based on Delaunay Triangulation.

Yujing Qiao1, Ning Lv1, Xuefeng Ouyang2

  • 1School of Mechanical Engineering, Yangzhou Polytechnic College, Yangzhou 225009, China.

Micromachines
|August 26, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a variable density filling algorithm for 3D printing, enhancing part strength by optimizing infill density. The new method improves structural integrity without significantly increasing printing time or material use.

Keywords:
3D printingDelaunay triangulationconcave polygon convex decompositionfill tracespoisson disk sampling

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Area of Science:

  • Additive Manufacturing
  • Materials Science
  • Computational Geometry

Background:

  • Current 3D printing infill algorithms, like the classic method, result in uniform density and internal cavities.
  • These structural limitations in the transverse direction lead to reduced part strength in 3D printed components.
  • Optimizing infill strategies is crucial for improving the mechanical properties of additive manufactured parts.

Purpose of the Study:

  • To develop and evaluate a novel variable density filling algorithm for additive manufacturing.
  • To address the limitations of classic infill algorithms in enhancing part strength.
  • To improve the transverse strength of 3D printed parts through intelligent infill pattern generation.

Main Methods:

  • Concave-polygon-convex decomposition was applied to divide the printing area into sub-regions.
  • Variable infill density was assigned based on regional strength requirements.
  • Poisson disk sampling and Delaunay triangulation were employed to generate optimized infill paths.

Main Results:

  • The proposed variable density filling algorithm demonstrated an improvement in part strength compared to classical methods.
  • The algorithm effectively managed infill density distribution within the printed part.
  • No significant increase in printing time or consumable material consumption was observed.

Conclusions:

  • The variable density filling algorithm offers a viable approach to enhance the mechanical performance of 3D printed parts.
  • This method provides a way to achieve targeted strength improvements without compromising efficiency.
  • The integration of Delaunay triangulation and variable density control represents a significant advancement in additive manufacturing infill strategies.