Morphology and Compressive Property of 3D-printed 3-pointed Star Shape Prepared Using Lightweight Thermoplastic Polyurethane

Physical Property of 3D-Printed N-Pointed Star-Shaped Outsole Prepared by FDM 3D Printer Using the Lightweight TPU

“…The amount of voids was large in the order 3-PS-10 > 4-PS-10 > 6-PS-10 samples. In our former study [ 28 ], the 3-pointed star-shaped structures with various extruding temperatures and thicknesses were confirmed to have the smallest and most regular voids uniform in distribution on the surface of the sample at 240 °C extruding temperature printing conditions; the 10 mm 3PS structure prototypes showed the higher foaming condition. However, it is a different case in this study; the void quantity tends to reduce when adding thickness, indicating increasing density and hardness of 3PS prototypes.…”

“…During previous studies [ 27 , 28 , 29 ], several TPU materials with enhanced performance evaluations were investigated, especially for LW 3-, 4-, and 6-SP mechanical metamaterial structures [ 27 ]. We, our research team, have observed the morphology stretching and compressive properties of the LW 3-, 4-, and 6-SP structure prototypes for 5 mm, 7.5 mm, and 10 mm thicknesses, which were fabricated with an FDM printer based on 200 °C, 220 °C, and 240 °C nozzle temperatures and 50% infill density to confirm and compare the compressive resistance of structures [ 28 , 29 ].…”

“…During previous studies [ 27 , 28 , 29 ], several TPU materials with enhanced performance evaluations were investigated, especially for LW 3-, 4-, and 6-SP mechanical metamaterial structures [ 27 ]. We, our research team, have observed the morphology stretching and compressive properties of the LW 3-, 4-, and 6-SP structure prototypes for 5 mm, 7.5 mm, and 10 mm thicknesses, which were fabricated with an FDM printer based on 200 °C, 220 °C, and 240 °C nozzle temperatures and 50% infill density to confirm and compare the compressive resistance of structures [ 28 , 29 ]. The resulting experiment revealed that extruding temperature, thickness, and structural design have a clear impact on mechanical qualities, as the temperature increased, and various physical properties were obtained, such as decreased specific gravity, lower compressive deformation rate, and higher compressive strength.…”