Analisis Kekuatan Material 3D Printing dengan Variasi Infill Pattern Menggunakan Filamen PETG dan Polycarbonate

Abstract

The development of 3D printing technology has become an innovative solution in modern manufacturing due to its ability to produce components with faster production times, lower costs, and high design flexibility. In this study, the technology was utilized to analyze the mechanical strength of parts printed using two types of filaments: Polyethylene Terephthalate Glycol (PETG) and Polycarbonate (PC). The main objective of this research is to compare the mechanical properties of both materials and to determine which one is more suitable for structural drone components, thereby improving efficiency and performance in lightweight manufacturing systems. The research was carried out using a Creality Ender-2 Pro 3D printer and Creality Slicer 4.8.2 software to control the printing parameters. Several infill patterns were used, including Honeycomb, Concentric, Gyroid, Cubic, and Quarter Cubic. Mechanical testing was conducted using a Universal Testing Machine (UTM) according to ASTM D638 for tensile testing and ASTM D790 for bending tests. The results showed that Polycarbonate (PC) demonstrated higher tensile and flexural strength compared to PETG, with the highest flexural strength of 119.13 N/mm² achieved using the Honeycomb pattern, and the highest tensile strength observed in the Concentric pattern. These findings indicate that the choice of material and infill pattern significantly affects the mechanical performance of 3D-printed products. It can be concluded that Polycarbonate (PC) possesses superior tensile and flexural strength compared to PETG, making it more suitable for structural parts of drones that withstand major loads, while PETG remains appropriate for non-structural components. The proper selection of material and infill pattern has been proven to enhance the strength and efficiency of 3D-printed designs. Furthermore, this research opens opportunities for future studies involving impact, fatigue, and thermal tests, as well as direct application on drone prototypes to obtain more comprehensive and practical results.