Study of Strength Characteristics of Products Produced by 3D-Printing from PLA

In modern mechanical engineering, along with reducing the metal consumption of structures, the main task is  to increase the reliability and durability of parts, assemblies of mechanisms. This problem never loses its relevance due 

to the ever-increasing requirements for manufacture of products, with the need to save scarce expensive metals and alloys and,  as a result, replace them with economically more profitable options. One of the most promising, from the point of view of ecology, ways to replace metals, is to use in the construction of plastic assemblies, in particular polylactic acid (PLA). PLA is a biodegradable thermoplastic used in 3D-printing. The paper presents results of an experimental study on the rupture of samples obtained by 3D-printing from PLA under various technological operating modes of 3D-printer. The following parameters have  been chosen as variable parameters: the form of filling samples (triangle, hexagon (honeycomb), line, edge), nozzle temperature (190–205 °С), sample filling factor (from 10 up to 40 %). Tensile testing of the samples have been carried out on a hydraulic tensile machine with a measuring software package in the Kason WDW-5 set. When performing tests, the conditional yield strength was considered the main out put indicator. The analysis of experimental data has shown a significant effect of the investigated technological parameters on the conventional yield point, which varied from 16.5 to  22.42 MPa. The most rational forms and sample filling factor, as well as the temperature of nozzle when printing with PLA, have been determined.

1. Zlenko M. A., Popovich A. A., Mutylina I. N. (2013) Additive Technologies in Mechanical Engineering. Saint-Petersburg, Publishing House of Polytechnical University. 222 (in Russian).

2. Savchenya A. A., Ermakov A. I. (2020) Study of the Influence of Technological Parameters of 3D-Printing with PLA Plastic on the Mechanical Characteristics of Products. Mirovaya Ekonomika i Biznesadministrirovanie Malykh i Srednikh Predpriyatii: Materialy 16-go Mezhdunar. Nauch. Seminara, Provodimogo v Ramkakh 18-i Mezhdunar. Nauch.-Tekhn. Konf. “Nauka – Obrazovaniyu, Proiz-vodstvu, Ekonomike”, 26 Marta 2020 [World Economy and Business Administration of Small and Medium Enterprises: Proceedings of 16th International Scientifuc Workshop Held Within the Framework 18th International Scientific and Technical Conference “Science for Education, Production, Economy”, Minsk, March 26, 2020]. Minsk, Pravo i Ekonomika Publ., 231–232 (in Russian).

3. Valetov V. A. (2015) Additive Technologies (State and Prospects). Saint-Petersburg, Publishing House of ITMO University. 63 (in Russian).

4. Malevich D. M. (2018) Prospects for Development of Additive Technologies in the Republic of Belarus. Strategicheskie Napravleniya Sotsial'no-Ekonomicheskogo i Finansovogo Obespecheniya Razvitiya Natsional'noi Ekonomiki: Materialy II Mezhdunar. Nauch.-Prakt. Konf., g. Minsk, 27–28 Sent. 2018 g. [Strategic Directions of Socio-Economic and Financial Support for Development of National Economy: Proceedings of 2nd International Scientific and Practical Conference, Minsk, Sept. 27–28, 2018]. Minsk, 275–276 (in Russian).

5. Ermakov A. I. (2017) Disposal of Containers and Packaging. Minsk, Belarusian National Technical University. 194 (in Russian).

6. Zalohin M. Yu., Skliarov V. V., Dovzhenko J. S., Brega D. A. (2019) Experimental Determination and Comparative Analysis of the PPH030GP, ABS and PLA Polymer Strength Characteristics at Different Strain Rates. Nauka i Tekhnika = Science & Technique, 18 (3), 233–239. https://doi.org/10.21122/2227-1031-2019-18-3-233-239.

7. Cantrell J. (2016) Experimental Characterization of the Mechanical Properties of 3D-Printed ABS and Polycarbonate Parts. Advancement of Optical Methods in Experimental Mechanics, Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics, (3), 89–105. https://doi.org/10.1007/978-3-319-41600-7_11.

8. Galeta T., Raos P., Stojšić J., Pakši I. (2016) Influence of Structure on Mechanical Properties of 3D-Printed Objects. Procedia Engineering, 149, 100–104. https://doi.org/10.1016/j.proeng.2016.06.644.

9. Rankouhi B., Javadpour S., Delfanian F., Letcher T. (2016) Failure Analysis and Mechanical Characterization of 3D-Printed ABS with Respect to Layer Thickness and Orientation. Journal of Failure Analysis and Prevention, 3 (16), 467–481. https://doi.org/10.1007/s11668-016-0113-2.

10. Mohamed O. A., Masood S. H., Bhowmik J. L., Nikzad M., Azadmanjiri J. (2016) Effect of Process Parameters on Dynamic Mechanical Performance of FDM PC/ABS Printed Parts Through Design of Experiment. Journal of Materials Engineering and Performance, 25 (7), 2922–2935. https://doi.org/10.1007/s11665-016-2157-6.

11. Chabanenko A. V., Nazarevich S. A., Shchenikov Ya. A., Gulevitskii A. Yu. (2018) Additive Manufacturing Technology, Modeling and Quality Control of the Layerby-Layer Synthesis Process. Saint-Petersburg, Publishing House of State University of Aerospace Instrumentation. 137 (in Russian).

12. State Standard 11262–80. Plastics. Tensile Test Method (as Amended by Change No 1). Moscow, Gosstandart Publ., 1980. 8 (in Russian).

13. Tretyakova A. A., Ermakova V. A., Ermakov A. I. (2021) Corn as the Main Rawmaterial for the Production of PLA Plastic. Pererabotka i Upravlenie Kachestvom Sel'skokhozyaistvennoi Produktsii: Materialy 5-i Mezhdunar. Nauch.-Prakt. Konf., g. Minsk, 25–26 Marta 2021 [Processing and Management of Quality of Agricultural Products: Proceedings of 5th International Scientific and Practical Conference, Minsk, March 25–26, 2021]. Minsk, Belarusian State Agrarian Technical University, 74–76 (in Russian).

14. Tretyakova A. A., Ermakov A. I. (2021) Influence of Temperature Conditions of 3D-Printing on Product Characteristics. Mirovaya Ekonomika i Biznes-Administrirovanie Malykh i Srednikh Predpriyatii: Materialy 17-go Mezhdu-nar. Nauch. Seminara, Provodimogo v Ramkakh 19-i Mezh-dunar. Nauch.-Tekhn. Konf. “Nauka – Obrazovaniyu, Proizvodstvu, Ekonomike”, 25–26 Marta 2021g. [World Economy and Business Administration of Small and Medium Enterprises: Proceedings 17th International Scientifuc Workshop Held Within the Framework 19th International Scientific and Technical Conference “Science for Education, Production, Economy”, Minsk, March 25–26, 2021]. Minsk, Pravo i Ekonomika Publ. 213 (in Russian).

15. Ermakov A. I., Chaiko S. V. (2017) Use of 3D-Printing in the Confectionery Industry. Nauka – Obrazovaniyu, Proizvodstvu, Ekonomike: Materialy 15-i Mezhdunar. Nauch.-Tekhn. Konf. 70-i Nauch.-Tekhn. Konf. Prof.-Prepod. Sostava, Nauch. Rabotnikov, Doktorantov i Aspir. BNTU. T. 4 [Science for Education, Production, Economy: Proceedings of 15th International Scientific and Technical Conference, 70th Scientific and Technical Conference of Teaching Staff, Researchers, Doctoral Students and Postgraduates of BNTU. Vol. 4]. Minsk, Belarusian National Technical University, 503 (in Russian).

16. Ermakov A. I., Kniga V. V., Meleshchenya E. P., Tret'yakova A. A. (2017) Development of 3D-Printer for Educational Institutions. Pererabotka i Upravlenie Kachestvom Sel'skokhozyaistvennoi Produktsii: Sb. St. III Mezhdunar. Nauch.-Prakt. Konf., g. Minsk, 23–24 Marta 2017 g. [Processing and Management of Quality of Agricultural Products: Collecte Dpapers of III International Scientific and Practical Conference, Minsk, March 23–24, 2017]. Minsk, Belarusian State Agrarian Technical University, 426–428 (in Russian).