Teuku Edisah Putra, Muhammad Dirhamsyah, Amir Zaki Mubarak, Putra Nauli
This study aimed to identify the mechanical properties of Polylactic Acid. Tensile testing specimens were printed with nozzle diameters of 0.4, 0.6, and 0.8 mm, as well as densities of 10, 50, and 100%, respectively. The results showed that the relationship between stress and strain occurred only in the plastic zone. A nozzle diameter of 0.6 mm with 100% density produced the highest values for all mechanical properties, with an elastic modulus of 1226.2 MPa, ultimate tensile strength of 44.74 MPa, and elongation at the breakpoint of 2.6%. The mechanical properties obtained from the tensile tests were still significantly lower than the native characteristics of Polylactic Acid, which was influenced by moisture due to the porous structure of the fabricated parts. The changes in mechanical properties caused by three-dimensional printing suggested that many parameters should be considered to produce high-quality products. © 2025, Politechnika Lubelska. All rights reserved.
Department of Mechanical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia
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