Ss; and (c) dimensional specifics of unit cells.Appl. Sci. 2021, 11,Within a equivalent style, two 3D Benidipine Technical Information samples with identical geometrical capabilities have been fabricated by indicates of powder bed fusion of polymers with two unique materials. The PA12 sample was fabricated on an EOS P 396 SLS machine, though the Duraform FLEX sample was fabricated on a DTM Sinterstation 2500 Plus. The geometrical attributes from the 3D sam7 of 15 ples are shown in Figure five, while the method parameters for the SLS processes are supplied in Tables 5 and six.Figure CAD of your 3D auxetic samples in different views and dimensional specifics of unit cells. Figure 5.5. CAD of your 3D auxetic samples in unique views and dimensional particulars of unit cells. Table Method parameters for SLS FDM process with Raised (nylon). Table 5.four. Approach parameters for theprocess with PA12 powder3D Pro2 Plus Dual Extruder. Method Parameter Filament diameter Nozzle diameter Extrusion width Nozzle temperature Bed temperature Printing speed Layer height Infill density Materials PLA 1.75 0.4 0.44 205 60 50 0.2 100 PETG 1.75 0.4 0.44 240 80 45 0.two one hundred TPU 1.75 0.4 0.44 225 60 25 0.two one hundred Units mm mm mm C C mm/s mm Extrusion width is 11020 of your Nozzle diameter.In a comparable fashion, two 3D samples with identical geometrical attributes had been fabricated by suggests of powder bed fusion of polymers with two unique supplies. The PA12 sample was fabricated on an EOS P 396 SLS machine, while the Duraform FLEX sample was fabricated on a DTM Sinterstation 2500 Plus. The geometrical attributes on the 3D samples are shown in Figure 5, whilst the method parameters for the SLS processes are supplied in Tables 5 and 6.Appl. Sci. 2021, 11, 10362 PEER Critique Appl. Sci. 2021, 11, x FOR8 15 eight ofofValue Table 5.Method parameters for SLS approach with PA12 powder (nylon). Procedure Parameter Machine typeProcess Parameter Material (powder) Machine BMS-8 References variety Laser Material (powder) Laser power Laser variety Laser spot diameter Laser power Laser speed Laser spot diameter Layer thickness Laser speed Layer thickness Hatch distance Hatch distanceEOS P 396 Worth EOS PA2200 (PA12) EOS P 396 2 CO EOS PA2200 (PA12) 40 CO2 F-theta lens, Regular focus 40 4000 F-theta lens, Normal focus 4000 one hundred 100 0.0.Units Units – – W m W mm/s m mm/s mmmmTable six. Approach parameters for SLS method with Duraform Flex powder (rubber).Table six.Process parameters for SLS method with Duraform Flex powder (rubber). Units Method Parameter ValueMachine variety Approach Parameter Material (powder) Machine kind Laser type Material (powder) Laser variety Laser energy Laser power Laser spot diameter Laser spot diameter Laser speed Laser speed Layer thickness Layer thickness Hatch distance Hatch distanceDTM Value Sinterstation 2500 Plus Duraform FLEX, infiltrated DTM Sinterstation 2500 Plus CO2 Duraform FLEX, infiltrated CO2 30 30 300 300 5000 5000 150 150 0.three 0.Units – W W m mm/s mm/sm mm mm-4. Experimental Mechanical Testing of 3D Printed Auxetic Structures 4. Experimental Mechanical Testing of 3D Printed Auxetic Structures four.1. Experimental Setup 4.1. Experimental Setup The sample prototypes produced with 3D printing had been experimentally tested under The sample prototypes developed with 3D printing were experimentally tested under compression loading to investigate their auxetic response. All samples had been characterized compression loading to investigate their auxetic response. All samples have been characterized utilizing a universal uniaxial compression tester with a strain price.