Investigations of the mechanical properties on different print orientations in SLA 3D printed resin

Abstract

3D printing has been recognized as the future manufacturing technique by different industries. The properties of products manufactured using this technique depend upon large number of factors, with print orientation being one among the most important factors. Currently, there is no standard for the build orientation of the printed component. To date, the analysis of material properties is conducted by testing specimens printed in different orientations. The present work explores the effect of layer orientations on the different mechanical properties of an SLA manufactured polymer material. Five different orientations, i.e. 0°, 22.5°, 45°, 67.5° and 90° were used to print the specimens for the analysis of mechanical properties of the material. Tensile, compression, flexural, impact, fatigue and vibration analysis are the different mechanical tests that were conducted as per their respective standards. It was found that the print orientation plays a significant role in the behaviour of the respective mechanical property. The maximum tensile and compressive load are being taken by the specimens printed at an angle of 22.5° and 67.5°, respectively. The specimen printed at 67.5° orientation again have highest flexural strength, whereas the specimen printed at 0° have higher impact and fatigue strength.

Masked stereolithography of hydroxyapatite bioceramic scaffolds through an integrative approach: From powder tailoring to evaluation of 3D printed parts properties

“…Then, a decrease in the compressive load is observed for (90º) as the printing orientation is parallel to the direction of loading (4.8±0.2 MPa). These results are in line with Lee et al [56] and Saini et al [57] which said that the diagonally printed specimens (45º) have higher compressive strength as compared to axial and transverse 3D printed parts. Indeed, they are in accordance with the results obtained by Feng et al [21] whose HA printed scaffolds (at orientation 0º and using a 50 vol.…”

Compact Beam Homogenizer Module with Laser-Fabricated Lens-Arrays

“…Basically, a 405 nm diode laser (250 mW, laserspot 140 µm) cures a photosensitive resin (Clear, Formlabs) successively layer by layer (50 µm height) forming a 3D shaped object, shown in Figure 6b. The printed element is fixed with an orientation of 45 • (orientation has direct impact on the emerging support structures and the final quality of the sample [34,35]) by an adhesion layer on the basic build platform of the printer. The final precise housing is shown in Figure 7a with the lens arrays are glued into the housing with a transparent instant adhesive (Loctite 495) while a 7 mm aperture is cutted out of molybdenum by the afore used femtosecond pulsed laser.…”

Ultrawide 3D Phononic Bandgap Metastructures as Broadband Low Frequency Filter

“…One can observe identical attenuation bandwidths however due to accelerometers limited precision compare to both FEA codes, there is a discrepancy between numerical and experiment attenuation depth. Other possible reasons for minor discrepancy between numerical and experimental results are (1) manufacturing issues 32,33 and anisotropic feature of the samples (2) back-reflection of the incident waves from the sample boundaries that may have obscure the results. Further, it is observed the presence of η on numerical transmission curve merges the first widest BG with other higher frequency BGs that results in a broadband vibration attenuation zone.…”