Manufacturing Technology 2026, 26(3):280-295 | DOI: 10.21062/mft.2026.034

Impact of Infill Patterns and Densities on the Mechanical Strength of FDM 3D-Printed Components

Marija Dimovska ORCID..., Nenad Radenkovikj ORCID..., Ognen Tuteski ORCID..., Ema Vasileska ORCID..., Boban Kusigerski ORCID..., Mite Tomov ORCID..., Valentina Gechevska ORCID...
Faculty of Mechanical Engineering - Skopje, Ss. Cyril and Methodius University in Skopje, Ruger Boskovic 18, 1000 Skopje, R. Macedonia

Additive manufacturing (AM), more commonly known as 3D printing, is a highly convenient manufacturing process that enables the creation of complex 3D objects. The large body of literature proved that the choice of material, the printing technology used, and the values of certain process parameters all influence the mechanical behavior of the final part. In this study, the Fused Deposition Modeling (FDM) technology was used to manufacture standardized test specimens, which were all subjected to mechanical testing. The main aim of the research was to investigate the effects of various infill pat-terns, combined with various infill densities, on tensile strength, and thus determine the patterns that enhance better structural performance. Three infill density levels were analyzed along with five infill patterns. A systematic sequence of tensile tests traced the correlation between internal material distribution and measured mechanical properties. By systematically varying the infill parameters, this study provides valuable insights into selecting appropriate configurations for specific applications. The findings contribute to advancements in AM design and material utilization, leading to stronger and more efficient components.

Keywords: FDM technology, 3D printing, Tensile strength, Infill patterns, Infill density

Received: August 1, 2025; Revised: May 21, 2026; Accepted: May 28, 2026; Prepublished online: June 15, 2026; Published: June 29, 2026  Show citation

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Dimovska M, Radenkovikj N, Tuteski O, Vasileska E, Kusigerski B, Tomov M, Gechevska V. Impact of Infill Patterns and Densities on the Mechanical Strength of FDM 3D-Printed Components. Manufacturing Technology. 2026;26(3):280-295. doi: 10.21062/mft.2026.034.
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