20.500.12556/DKUM-98163 Experimental and numerical thermo-mechanical characterization of polylactic acid fabricated by fused filament fabrication This study investigates the thermomechanical response of polylactic acid (PLA) specimens fabricated by fused filament fabrication (FFF) at two nozzle temperatures (190°C and 230°C), while mechanical testing was performed at three temperatures (20°C, 30°C, and 40°C) below the glass transition temperature (Tg). Quasi-static uniaxial tensile and compression tests were conducted to characterize the mechanical response under these thermal conditions. The experimental results showed that increasing nozzle temperature improved tensile stiffness and strength. The highest tensile and compressive properties were obtained for specimens printed at 230°C and tested at 20°C, with tensile modulus and tensile strength of 3573 MPa and 54 MPa, and compressive modulus and compressive strength of 1343 MPa and 71 MPa, respectively, indicating anisotropic mechanical behavior. In addition, dynamic mechanical thermal analysis (DMTA) was also performed to evaluate the viscoelastic response and determine Tg, including a comparison with injection-molded PLA. To establish a reliable predictive framework for thermomechanical behavior, experimental measurements were used to calibrate the ANSYS-Three Network Model (TNM). The resulting numerical simulations of the tensile and compression tests demonstrated good agreement with the experimental results, confirming the capability of the model to predict the thermomechanical response of polylactic acid fabricated by fused filament fabrication. Ansys-three network model dynamic mechanical thermal analysis fused filament fabrication polylactic acid thermomechanical characterization omrežni model Ansys-three dinamična mehanska termična analiza izdelava taljenih filamentov polimlečna kislina termomehanska karakterizacija true false true Wiley Angleški jezik Slovenski jezik https://4spepublications.onlinelibrary.wiley.com/doi/10.1002/pen.70610 Članek v reviji 2026-05-21 10:49:04 2026-05-21 10:49:04 2026-05-22 03:16:12 0000-00-00 00:00:00 2026 0 0 16 str. First published: 18 May 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-05-18 531:004.8 278555907 10.1002/pen.70610 1548-2634 https://4spepublications.onlinelibrary.wiley.com/doi/10.1002/pen.70610 1 ec6c2a2a-54f1-11f1-80bc-00155d580e34 https://dk.um.si/Dokument.php?lang=slv&id=206301 Polymer_Engineering__Sci_-_2026_-_Experimental_and_Numerical_Thermo‐Mechanical_Characterization_of_Polylactic.pdf Polymer_Engineering__Sci_-_2026_-_Experimental_and_Numerical_Thermo‐Mechanical_Characterization_of_Polylactic.pdf 1 C24C7FED385D3D2CF94F01B4B2C50A84 a6786819de59035d7073dfd2153e00cf3bd74b1298998b60db2efad9c166f34e 4c166d5d-54f2-11f1-80bc-00155d580e34 https://dk.um.si/Dokument.php?lang=slv&id=206302 Fakulteta za strojništvo 0 0 0