Optimizing Printing Parameters for Enhanced Mechanical Properties of Carbon Fiber-Reinforced Engineering Filaments in FFF
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Keywords:
3D printing, Fused Filament Fabrication (FFF), Composite Filaments, Mechanical Properties, Experimental DesignAbstract
The demand for improved mechanical performance in 3D printed components has grown with
advancements in technology. This study focuses on carbon fiber-reinforced polyethylene terephthalate
(PET) and polyamide 12 (PA12) filaments used in the Fused Filament Fabrication (FFF) process. To
explore the effects of printing parameters on mechanical properties, the Taguchi experimental design was
employed. Four key parameters-layer thickness, infill density, printing temperature, and print speed-were
selected at three levels each. Standard tensile specimens were fabricated for each material based on
Taguchi’s design, and their mechanical properties recorded. Results showed that material properties were
sensitive to printing parameters. Statistical analysis revealed that for both materials, layer thickness and
infill density were the most influential parameters on mechanical properties, while print speed and
temperature had minimal effects. The p-value for the statistical model of tensile strength, tensile modulus,
and elongation at break were found below the critical 0.05 threshold for tensile strength and elongation,
indicating the model's suitability, except for tensile modulus. Additionally, optimization values for both
materials obtained via the statistical model were presented.
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