Investigation of Tensile Strength in 3D Printed PLA+ Samples: Influence of Raster Angle and Infill Density

Abstract

In this study, the mechanical properties of PLA+ samples produced through Fused Deposition Modeling (FDM) 3D printing are investigated. The research focuses on the effects of two critical parameters on tensile strength in 3D printers. These are raster angle and infill density. Raster angles of 0°, 90° and ±45° were chosen. The infill density, which determines the internal material distribution, was set to 20%, 50% and 100%. As a result of the tensile test, the highest ultimate strength value of 44.52 MPa was obtained in the ±45°-100% combination. The highest modulus of elasticity value was obtained from 90°-100% combination with 1.55 GPa. These findings highlight the critical role of printing parameters in determining the mechanical performance of FDM printed PLA+ parts. The study provides information for optimizing print settings to achieve desired strength and stiffness properties in 3D printed components for engineering applications.