Barry, A. (2022). Investigation on the effect of infill orientation on the flexural properties in FDM parts. The Young Researcher, 6(1), 94-105. http://www.theyoungresearcher.com/papers/barry.pdf

Abstract
Parts made with Fused Deposition Modeling (FDM) are anisotropic, meaning that their proper- ties are dependent on their orientation and the direction of forces. This study aimed to investigate how the infill orientation in FDM parts influences their flexural properties. Samples were created with either a 0° or 45° infill orientation and evaluated using a 3-Point Bending test. Samples with a 0° infill orientation had a brittle failure mode, lower coefficient of variation, higher yield strength, and higher flexural modulus, while samples with a 45° infill orientation had a ductile failure mode and a higher maximum force value. Samples with a 45° infill orientation had a higher flexural strain at failure, but samples of both infill orientations had similar flexural strength. This suggests that while both orientations result in similar flexural strengths, the 0° infill orientation is largely superior to the 45° infill orientation in terms of flexural properties.

Keywords: Fused deposition modeling (FDM), anisotropy, infill orientation, flexural properties

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