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A Study on Tensile Strength of the 3D Printing Product According to the Nitrogen Concentration of Chamber Inside  

Lee, Song Yeon (Mechatronics Engineering, Graduate School of Korea University of Technology and Education)
Huh, Yong Jeong (School of Mechatronics Engineering, Korea University of Technology and Education)
Publication Information
Journal of the Semiconductor & Display Technology / v.21, no.1, 2022 , pp. 103-107 More about this Journal
Abstract
Scaffolds are the structures that safely protect sensors in various parts of the body. Because of scaffolds must protect sensors from load, the tensile strength of the scaffolds must be higher than 750 kgf/cm2. Currently, the tensile strength of scaffolds made with the 3d printer is 714 kgf/cm2. We confirm that the tensile strength of the scaffolds increase using air with high nitrogen concentration. In this study, we conducted experiments to find nitrogen concentrations in which the tensile strength of the specimen is higher than 750 kgf/cm2. The nitrogen control device and the nitrogen concentration sensor were installed in the chamber type 3d printer. The nitrogen concentration inside the 3d printer was changed by 5 % from 80 % to 100 %. Specimens of ASTM D 638 standard were produced under changed nitrogen concentration. We measured the tensile strength of specimens. We compared the tensile strength of specimens produced under each nitrogen concentration. We confirmed that when air with nitrogen concentration of 90 % was used, the tensile strength of scaffolds were 762 kgf/cm2.
Keywords
Nitrogen concentration control; Stress-strain curve; Scaffold tensile strength; Tensile specimen; Tensile strength improvement;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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