20.500.12556/RUL-138754 Numerical investigation of the cycling loading behavior of 3D-Printed poly-lactic acid (PLA) cylindrical lightweight samples during compression testing The additive technologies widely used in recent years provide enormous flexibility in the production of cellular structures. Material extrusion (MEX) technology has become very popular due to the increasing availability of relatively inexpensive desktop 3D printers and the capability of fabricating parts with complex geometries. Poly-lactic acid (PLA) is a biodegradable and commonly applied thermoplastic material in additive manufacturing (AM). In this study, using a simulation method based on the user subroutine titled “user subroutine to redefine field variables at a material point” (USDFLD) in the finite element method (FEM) ABAQUS software, the elastic stiffness (ES) of a cylindrical lightweight cellular PLA sample with a 2.4 mm infill line distance (ILD), which was designed as a layered structure similar to the laboratory mode with a MEX method and was subjected to cyclic compressive loading, was investigated by considering the variation of the Young’s modulus depending on the variation of the equivalent plastic strain (PEEQ). It was observed that the PLA sample’s elastic stiffness increases during cyclic loading. This increase is high in the initial cycles and less in the subsequent cycles. It was also observed that the simulation results are in good agreement with the experimental results. three-dimensional printing numerical simulation PLA elastic stiffness compression test loading–unloading 3D tiskanje numerična simulacija PLA elastična togost tlačni test true false true Angleški jezik Slovenski jezik Članek v reviji 2022-08-12 13:33:34 2022-08-12 13:33:40 2025-11-13 11:57:37 0000-00-00 00:00:00 2022 0 0 18 str. iss. 16 Vol. 12, art. 8018 Aug. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.62:621.7 2076-3417 10.3390/app12168018 118174211 Karimi,_Mole_and_Pepelnjak-Numerical_investigation_of_the_cycling_loading_behavior_of_3D-Printed_poly-lactic_acid_(PLA)_cylindrical_lightweight_samples_during_compression_testing.pdf Karimi,_Mole_and_Pepelnjak-Numerical_investigation_of_the_cycling_loading_behavior_of_3D-Printed_poly-lactic_acid_(PLA)_cylindrical_lightweight_samples_during_compression_testing.pdf 1 C59007FE7D5CB90BE3B9CD3D1717ADDF 19fe38d2fcf56744eb83bd70a1f0ef1f25e0a769d8f02edc7383e3f546ccab88 332bca63-1a33-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159190 https://www.mdpi.com/2076-3417/12/16/8018 1 9e48bcbc-1a32-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=159189 Fakulteta za strojništvo 0 0 0