20.500.12556/RUL-136774 Effect of printing process parameters on the shape transformation capability of 3D printed structures The aim of our research was to investigate and optimise the main 3D printing process parameters that directly or indirectly affect the shape transformation capability and to determine the optimal transformation conditions to achieve predicted extent, and accurate and reproducible transformations of 3D printed, shape-changing two-material structures based on PLA and TPU. The shape-changing structures were printed using the FDM technology. The influence of each printing parameter that affects the final printability of shape-changing structures is presented and studied. After optimising the 3D printing process parameters, the extent, accuracy and reproducibility of the shape transformation performance for four-layer structures were analysed. The shape transformation was performed in hot water at different activation temperatures. Through a careful selection of 3D printing process parameters and transformation conditions, the predicted extent, accuracy and good reproducibility of shape transformation for 3D printed structures were achieved. The accurate deposition of filaments in the layers was achieved by adjusting the printing speed, flow rate and cooling conditions of extruded filaments. The shape transformation capability of 3D printed structures with a defined shape and defined active segment dimensions was influenced by the relaxation of compressive and tensile residual stresses in deposited filaments in the printed layers of the active material and different activation temperatures of the transformation. additive manufacturing 4D printing PLA TPU printability shape transformation dodajalno izdelovanje 4D tiskanje PLA TPU tiskovna prehodnost preoblikovanje true false true Angleški jezik Slovenski jezik Članek v reviji 2022-05-20 10:35:01 2022-05-20 10:35:02 2022-09-15 04:14:19 0000-00-00 00:00:00 2022 0 0 22 str. iss. 1, art. 117 Vol. 14 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 655.1 2073-4360 10.3390/polym14010117 92056835 polymers-14-00117.pdf polymers-14-00117.pdf 1 731014B96B2A20CFCBFC1430AA7154CA 6c3bde496f18dd0f06a2f01557b025caaa3d8cbe56ed1b3ce7374a9d10c886df e09ed2d9-d817-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156554 https://www.mdpi.com/2073-4360/14/1/117 1 9ed8a017-d817-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156553 Naravoslovnotehniška fakulteta 0 0 0