Influence of infill settings on the flexural properties of 3D printed ABS plus polymer parts in bending loading

Document Type : Research Article

Authors

1 School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

2 Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.

Abstract

One of the most commonly used techniques in 3D printing is Fused Deposition Modeling (FDM). Despite its widespread adoption, creating functional parts with suitable mechanical properties remains a significant challenge. Previous studies have often focused on various aspects of FDM. Still, there remains a lack of comprehensive research addressing the flexural properties of 3D-printed ABS plus polymer parts under bending loads. This gap in the literature motivated the current study. The manufacturing parameters in the FDM process, such as infill density (ID) (20, 50, and 80 percent), layer thickness (LT) (0.1, 0.2, and 0.3 mm), and raster angle (RA) (0, 45, and 90 degrees) were investigated to understand their mutual influence on the bending mechanical properties at ambient temperature through experimental design and analysis of variance. Reinforced ABS polymer filament was utilized in this research. The parameters were studied using the response surface method (RSM) based on the central composite design (CCD), employing quadratic regression equations for all responses to determine the model coefficients. Analysis of variance revealed that the raster angle is the most critical factor influencing the bending response, as it directly affects load transfer to the specimen. The optimal parameters identified for maximum bending strength were ID = 78.277%, LT = 0.295 mm, and RA = 1.599 degrees. The bending strength is maximum in thick layers and low raster angles.

Keywords

Main Subjects

References

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AUT Journal of Mechanical Engineering
Volume 9, Issue 1
2025
Pages 83-96

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