فهرست نشریات علمی دسترسی آزاد ایران

Additive Manufacturing (AM) has emerged as an innovative manufacturing method to fabricate components directly from Computer-Aided Design (CAD) models by depositing material layer over another layer. Fused Deposition Modeling (FDM) is among the most widely adopted processes in AM techniques due to its easy use, economical nature, and compatibility with thermoplastic polymers such as polylactic acid (PLA). However, the mechanical behaviors of the FDM 3D printed parts are significantly influenced by manufacturing process parameters, particularly infill density, build orientation, and infill pattern. The present study primarily focused on how these process parameters influence the compressive performance of PLA printed parts to optimize the structural performance. Samples were fabricated with infill densities of 40%, 60%, and 80%, combined with three infill geometries—rectilinear, concentric, and honeycomb—and tested under axial and transverse build orientations. The results reveal that compressive strength generally increases with higher infill density in the axial orientation, reaching a maximum of approximately 39 MPa at 80% infill across all patterns. In contrast, transverse orientation exhibited a peak compressive strength of about 35 MPa at 60% infill with concentric geometry, after which performance declined. Overall, axial builds consistently outperformed transverse builds, highlighting the importance of orientation and density towards optimizing the mechanical properties of PLA printed FDM components.