Comprehending the effect of printing orientation on the mechanical performance of polyamide-reinforced carbon fibre composites

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Numerous studies have investigated polymeric composites fabricated using fused deposition modelling. However, the mechanical performance of these composites, which is influenced by various factors, including materials and printing parameters, remains unknown. Further understanding these factors helps improve the accuracy of mechanical performance predictions. Therefore, this study fabricates in-house polyamide reinforced with carbon fibre at a composition of 20 wt.% and controls its printing parameters, including layer height and printing orientations. Results indicated that controlling the orientation at a 0° angle are the most crucial factor compared to layer height, which leads to a maximum flexural strength of ∼21 MPa due to improvements in load-bearing capacity and adhesion bonding between the fibre and matrix.