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Consequence of the industrialized considerations on the flexible and splintering stuffs of FDM 3D-printed PLA samplings

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European Journal of Applied Engineering and Basic Sciences, 2022

Autour(s)

  • Lixuan Zhang, Chang Li, Don Chen, Zheng Xiang, Bing Pan, Lee Chen

Abstract

Fused Deposition Modeling (FDM), also known as material extrusion, is currently one of the most popular Additive Manufacturing (AM) technology on the market. In this study, two commercial FDM printers were used for layer-by-layer manufacturing of polylactic acid (PLA) Dog Bone (DB) and Single Edge Notched Bend (SENB) specimens, aimed at investigating the in influence of the manufacturing parameters on the tensile and fracture properties of PLA elements obtained by FDM technology. The effects of growing direction (horizontal and vertical), building orientation (0◦, 45◦ and 90◦), printer type, layer thickness (0.15 and 0.40 mm), specimen thickness (4 and 10 mm) and lament color (purple, white, black, gray, red, orange) are discussed in detail. Tensile tests were performed on DB specimens, while fracture mechanics tests on SENB specimens. Both the tensile and fracture properties of FDM 3D-printed PLA specimens have been found to be dependent on the investigated manufacturing parameters. From the microstructural analyses of the SENB fracture surfaces, it has been observed that the fracture mechanisms and crack propagation is a step-wise process. Finally, the material properties charts (Young’s modulus and mode I fracture toughness versus tensile strength) are plotted.

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