Pengaruh Sudut Polygon Struktur Honeycomb Ribs PLA Terhadap Kekuatan Bending Hasil 3D Printing

The development of 3D printing technology has increased the use of Rib Honeycomb structures to produce lightweight components with improved mechanical performance. This study aims to analyze the effect of Polygon angle variation in Polylactic Acid (PLA) Rib Honeycomb structures on the flexural strength of specimens manufactured using the Fused Deposition Modeling (FDM) process and to determine the optimal Polygon angle. The research involved Finite Element Method (FEM) simulation using SolidWorks, followed by specimen fabrication with an FDM 3D printer and three-point Bending testing according to ASTM D790. The evaluated parameters included stress distribution, deflection, maximum flexural stress, strain, and flexural modulus. The results show that Polygon angle variation affects the mechanical behavior of Rib Honeycomb structures. The 130° Polygon angle produced the highest flexural strength with lower deflection than the other variations, resulting in a more uniform stress distribution. These findings provide a reference for developing lightweight structures for automotive applications based on additive manufacturing.