Turning-angle optimized printing path of continuous carbon fiber for cellular structures

Yuming Huang, Guoxin Fang, Tianyu Zhang, Charlie C.L. Wang

Research output: Contribution to journalArticlepeer-review


This paper presents an algorithm to compute optimized toolpaths to print thin-walled cellular structures with continuous carbon fiber. The input cellular structure is usually represented by a graph G, and the requirements to ensure high quality manufacturing include the coverage, continuity and sharp-turning prevention of fiber deposition. To satisfy these requirements, we develop a new algorithm to search a continuous path on G's dual graph, the corresponding path on which G minimizes the total energy of tuning angles and can visit all edges of G at least once and at most twice. With the help of a post-processing algorithm, a path determined on the dual graph can be converted into an overlap-reduced toolpath for printing continuous carbon fiber. Physical tests were conducted to demonstrate the advantage of printing paths generated by our algorithm. Up to 46% enhancement on the breaking force is observed during the tensile tests when using a similar amount of fibers.

Original languageEnglish
Article number103501
JournalAdditive Manufacturing
Early online date21 Mar 2023
Publication statusPublished - 25 Apr 2023


  • Cellular structure
  • Continuous carbon fiber
  • Path planning
  • Turning-angle


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