Open hole tensile testing of 3D printed parts using in-house fabricated PLA filament

Abstract

Purpose Fused deposition modeling (FDM) is being increasingly used in automotive and aerospace industries because of its ability to produce specimens having difficult geometrical shape. However, owing to lack of critical information regarding the reliability and mechanical properties of FDM-printed parts at various designs, the use of 3D printed parts in these industries is limited. Therefore, the purpose of this paper is to investigate the impact of process parameters of FDM on the tensile strength of open-hole specimen printed using in-house-fabricated polylactic acid (PLA). Design/methodology/approach In the present study, three process parameters, namely, raster angle, layer thickness and raster width, are selected for investigation of tensile strength. To produce the tensile specimens in the FDM machine, the PLA filament is used which is fabricated from PLA granules using a single-screw extruder. Further, the experimental values are measured and critically analysed. Failure modes under tests are studied using scanning electron microscopy (SEM). Findings Results indicate that the raster angle has a significant effect on the tensile strength of open-hole tensile specimen. Specimens built with 0° raster angle, 200-µm layer thickness and 500-µm raster width obtained maximum tensile strength. Originality/value In this work, a new concept of testing a plate that has a rectangular shape and a circular hole at the centre is tested. Open-hole tensile test standard ASTM D5766 has been implemented for the first time for the FDM process.

Effect of Printing Parameters on the Tensile Properties of 3D-Printed Polylactic Acid (PLA) Based on Fused Deposition Modeling

“…This technique has grown swiftly over the past decade and is widely applied in different fields, including engineering, construction, medicine, aerospace, etc. [ 1 , 2 , 3 ]. In the field of traditional manufacturing, producers require a longer circle time and incur higher costs to design and build a mold before starting to manufacture.…”

3D-Printing Nanocellulose-Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) Biodegradable Composites by Fused Deposition Modeling

“…Fused deposition modeling (FDM) is an extrusion-based 3D-printing technique that enables the construction of 3D structures, allowing different thermoplastic polymers to be printed at the microscale. , Some materials have been studied more extensively so far, such as poly­(acrylonitrile -co- butadiene -co- styrene) (ABS), , poly­(lactic acid) (PLA), , or polycaprolactone (PCL), , , and they are commonly used. Nowadays, the new challenging frontier of FDM is the use of unconventional polymers with original properties and different possible applications.…”

Impact energy absorption and fracture mechanism of FFF made fiberglass reinforced polymer composites

“…The mechanical properties of the components manufactured by the FFF process are relatively poor because of the polymer material. However, researchers have considered optimizing the FFF processing parameters, namely, part orientation, raster angle, layer height, raster width, air gap, infill pattern and infill density, to improve the mechanical properties of the components (Tymrak et al , 2014; Dawoud et al , 2016; Song et al , 2017; Garg et al , 2017; Dave et al , 2020). In addition to that, several enhanced polymer materials, namely, polyether ether ketone (PEEK) and polyetherimide plastic, PEI (ULTEM), are also used by researchers (Yang et al , 2017; Zaldivar et al , 2017).…”