Stress flow guided non-planar print trajectory optimization for additive manufacturing of anisotropic polymers
OPEN ACCESS
Loading...
Author / Producer
Date
2023-06-25
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
When manufacturing parts using material extrusion additive manufacturing and anisotropic polymers, the mechanical properties of a manufactured component are strongly dependent on the print trajectory orientation. We conduct non-planar slicing and optimize the print trajectories to maximize the alignment between the material deposition direction and the stress flow induced by a predefined load case. The trajectory optimization framework considers manufacturability constraints in the form of uniform layer height and line spacing. We demonstrate the method by manufacturing a load bearing mechanical bracket using a 5-axis 3D printer and a liquid crystal polymer material. The failure strength and stiffness of the optimized bracket are improved by a factor of 44 and 6 respectively when compared with conventional printing.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
72
Pages / Article No.
103628
Publisher
Elsevier
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Material extrusion; Fused filament fabrication; Trajectory optimization; Non-planar printing; Stress alignment
Organisational unit
03751 - Lygeros, John / Lygeros, John
Notes
Funding
180545 - NCCR Automation (phase I) (SNF)