TENSILE BEHAVIOUR OF PLA PARTS MANUFACTURED BY FDM: EFFECT OF INTERNAL DENSITY AND RASTER CONFIGURATION

Emilia SABĂU, Alexandru Ilie CHIŞ, Adrian POPESCU

Abstract


This paper investigates the influence of infill percentage and pattern on the tensile behavior of PLA specimens manufactured using Fused Deposition Modelling (FDM). The main objective was to examine how internal structure design affects strength, stiffness, and deformation under applied load. Tensile experiments were conducted in accordance with ISO 527-1, employing an Artillery Genius-Pro 3D printer and a Zwick/Roell Z150 testing machine. The results demonstrate that increasing infill density leads to a substantial enhancement in tensile strength and stiffness, whereas grid and honeycomb arrangements demonstrated the most efficient internal geometries. The findings of this research provide valuable insight into the way infill strategy influences the structural behavior of FDM-printed PLA components, supporting further advancements in the design of lightweight and high-performance parts for engineering applications.

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