Investigation of Tensile and Impact Properties of 3D-Printed Parts with Varying Nozzle Diameters and Infill Densities

Md. Shahporan Rimon; Sajal Chandra Banik

doi:10.38032/scse.2026.4.100

Investigation of Tensile and Impact Properties of 3D-Printed Parts with Varying Nozzle Diameters and Infill Densities

Authors

Md. Shahporan Rimon Department of Mechanical Engineering, Chittagong University of Engineering & Technology, Chattogram-4349, Bangladesh
Sajal Chandra Banik Department of Mechanical Engineering, Chittagong University of Engineering & Technology, Chattogram-4349, Bangladesh

DOI:

https://doi.org/10.38032/scse.2026.4.100

Keywords:

3D Printing, PLA+, Nozzle Diameter, Infill Density, Mechanical Properties

Abstract

This study investigates the effects of nozzle diameter and infill density on the mechanical behavior of PLA+ parts, focusing on tensile and impact properties. I used a Bambu Lab A1 3D printer to manufacture the specimens at infill densities of 50% and 100%, with all other printing parameters fixed. The influence of nozzle diameter on structural integrity and load-bearing capacity was tested at four sizes: 0.2 mm, 0.4 mm, 0.6 mm, and 0.8 mm. The study’s results show that tensile properties and impact energy are highly correlated to both nozzle diameter and infill density. The larger the nozzle diameter, the higher the tensile stress and impact energy. Consistently enhancing the mechanical strength of a material is the increasing infill density of the polymer part. Based on the results, we can obtain some valuable insight into setting the FDM printing parameters that achieve a balance in accuracy, strength and toughness of the PLA+ parts for engineering and practical applications.

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References

[1] I. Gibson, D. Rosen, and B. Stucker, Additive Manufacturing Technologies. New York, NY: Springer New York, 2015. DOI: https://doi.org/10.1007/978-1-4939-2113-3

[2] B. Mallikarjuna, P. Bhargav, S. Hiremath, K. G. Jayachristiyan, and N. Jayanth, “A review on the melt extrusion-based fused deposition modeling (FDM): background, materials, process parameters and military applications,” International Journal on Interactive Design and Manufacturing (IJIDeM), vol. 19, no. 2, pp. 651–665, Feb. 2025. DOI: https://doi.org/10.1007/s12008-023-01354-0

[3] T. D. Ngo, A. Kashani, G. Imbalzano, K. T. Q. Nguyen, and D. Hui, “Additive manufacturing (3D printing): A review of materials, methods, applications and challenges,” Compos. B Eng., vol. 143, pp. 172–196, Jun. 2018. DOI: https://doi.org/10.1016/j.compositesb.2018.02.012

[4] N. Shahrubudin, T. C. Lee, and R. Ramlan, “An Overview on 3D Printing Technology: Technological, Materials, and Applications,” Procedia Manuf., vol. 35, pp. 1286–1296, 2019. DOI: https://doi.org/10.1016/j.promfg.2019.06.089

[5] A. Alafaghani, A. Qattawi, B. Alrawi, and A. Guzman, “Experimental Optimization of Fused Deposition Modelling Processing Parameters: A Design-for-Manufacturing Approach,” Procedia Manuf., vol. 10, pp. 791–803, 2017. DOI: https://doi.org/10.1016/j.promfg.2017.07.079

[6] G. D. Goh, Y. L. Yap, H. K. J. Tan, S. L. Sing, G. L. Goh, and W. Y. Yeong, “Process–Structure–Properties in Polymer Additive Manufacturing via Material Extrusion: A Review,” Critical Reviews in Solid State and Materials Sciences, vol. 45, no. 2, pp. 113–133, Mar. 2020. DOI: https://doi.org/10.1080/10408436.2018.1549977

[7] D. G. Zisopol, N. Ion, and A. I. Portoaca, “Comparison of the Charpy Resilience of Two 3D Printed Materials: A Study on the Impact Resistance of Plastic Parts,” Engineering, Technology & Applied Science Research, vol. 13, no. 3, pp. 10781–10784, Jun. 2023. DOI: https://doi.org/10.48084/etasr.5876

[8] P. Doungkom and K. Jiamjiroch, “Analysis of Printing Pattern and Infiltration Percent over the Tensile Properties of PLA Printed Parts by a Fuse Deposition Modelling Printer,” IOP Conf. Ser. Mater. Sci. Eng., vol. 501, p. 012028, Apr. 2019. DOI: https://doi.org/10.1088/1757-899X/501/1/012028

[9] M. N. Sudin, N. M. Daud, F. R. Ramli, and M. A. Yusuff, “The Effect of Nozzle Size on the Tensile and Flexural Properties of PLA Parts Fabricated Via FDM,” Science, Engineering and Technology, vol. 3, no. 1, Apr. 2023. DOI: https://doi.org/10.54327/set2023/v3.i1.71

[10] I. S. ELDeeb et al., “Optimization of Nozzle Diameter and Printing Speed for Enhanced Tensile Performance of FFF 3D-Printed ABS and PLA,” Journal of Manufacturing and Materials Processing, vol. 9, no. 7, p. 221, Jul. 2025. DOI: https://doi.org/10.3390/jmmp9070221

[11] D. Syrlybayev, B. Zharylkassyn, A. Seisekulova, M. Akhmetov, A. Perveen, and D. Talamona, “Optimisation of Strength Properties of FDM Printed Parts—A Critical Review,” Polymers (Basel)., vol. 13, no. 10, p. 1587, May 2021. DOI: https://doi.org/10.3390/polym13101587

[12] P. Czyżewski, D. Marciniak, B. Nowinka, M. Borowiak, and M. Bieliński, “Influence of Extruder’s Nozzle Diameter on the Improvement of Functional Properties of 3D-Printed PLA Products,” Polymers (Basel)., vol. 14, no. 2, p. 356, Jan. 2022. DOI: https://doi.org/10.3390/polym14020356

8th International Conference on Mechanical Engineering and Renewable Energy (ICMERE 2025)

Published

02.08.2026

Conference Proceedings Volume

Vol. 4 (2026): Proceedings of 8th International Conference on Mechanical Engineering and Renewable Energy (ICMERE2025)

Section

Articles

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

All the articles published by this journal are licensed under a Creative Commons Attribution 4.0 International License

How to Cite

[1]

M. S. Rimon and S. C. Banik, “Investigation of Tensile and Impact Properties of 3D-Printed Parts with Varying Nozzle Diameters and Infill Densities”, SCS:Engineering, vol. 4, pp. 184–189, Aug. 2026, doi: 10.38032/scse.2026.4.100.