Mechanical Properties of 3D-Printing Polylactic Acid Parts Subjected to Bending Stress and Fatigue Testing

Travieso-Rodríguez, J. Antonio; Jerez-Mesa, Ramón; Llumà, Jordi; Traver-Ramos, Oriol; Gómez-Gras, Giovanni; Rovira, Josep María Puig

doi:10.20944/preprints201910.0293.v1

Cited by 36 publications

(11 citation statements)

References 15 publications

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“…It is clear that the solidity (infill) percentage of the samples can increase the mechanical properties' values, so this parameters could vary based on the desired applicability. Also it can be seen from the results of [23], the nozzle diameter and fill density are the most influence parameters on the ultimate tensile strength, yield strength, and elastic modulus of produced ABS parts. The final result for the optimized set of parameters are shown in table 7.…”

Section: Results Discussionmentioning

confidence: 92%

“…To carry out the study an experimental design (DOE) has been applied based on Taguchi method which is a robust optimization technique to make experimental to predict responses and optimize the FFF process conditions in accuracy level [22]. The factors and levels shown in Table 1, have been chosen taking into account their high effectiveness on mechanical properties rely on previous researches [23], printer configurations, and material manufacturer recommendations. Due to Timberfill is a composition of PLA polymer with wood fibers, the manufacturer recommended to extrude it with minimum 5 mm nozzle diameter.…”

Section: Taguchi Experimental Designmentioning

confidence: 99%

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Study of the manufacturing process effects of fused filament fabrication and injection molding on tensile properties of composite PLA-wood parts

Zandi

Jerez-Mesa

Llumà

et al. 2020

Int J Adv Manuf Technol

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The present study evaluates the manufacturing parameters effects on the tensile properties of material composed by polylactic acid (PLA) with wood fibers known as Timberfill.The specimens were built through fused filament fabrication (FFF). The influence of four printing parameters (Layer height, Fill density, Printing velocity, and Orientation) are considered through a 27 Taguchi orthogonal array in order to reduce experimental runs. Tensile test is applied to obtain the response variable used as output results to perform the ANOVA calculations. Fill density is the most influential parameter on the tensile strength, followed by building orientation and layer height, whereas the printing velocity shows no significant influence. The optimal set of parameters and levels is found, being 75% fill density, 0 ○ Z-axis orientation, 0.4 mm layer height, and 40 mm/s velocity as the best combination. Applying this combination showed 9.37 MPa in maximum tension.Lastly, five solid Timberfill specimens manufactured via injection molding technology were also tested and the results compared to the printed samples. The values of the elastic modulus, elastic limit, and maximum tension of the injected samples were almost twofold of those were obtained for the FFF samples, but the maximum elongation of injected specimens was fell sharply.

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Section: Results Discussionmentioning

confidence: 92%

Section: Taguchi Experimental Designmentioning

confidence: 99%

Study of the manufacturing process effects of fused filament fabrication and injection molding on tensile properties of composite PLA-wood parts

Zandi

Jerez-Mesa

Llumà

et al. 2020

Int J Adv Manuf Technol

Self Cite

View full text Add to dashboard Cite

show abstract

“…X orientation provided the highest fatigue strength for FDM ABS in a tension fatigue test [ 38 ]. For other printing parameters, some studies carried out the flexural fatigue tests for FDM PLA bar and the results showed that larger layer thickness and nozzle size both increased the fatigue life [ 39 , 40 , 41 ]. However, similar research has not been carried out on FDM ABS.…”

Section: Introductionmentioning

confidence: 99%

Effects of Printing Parameters on the Fatigue Behaviour of 3D-Printed ABS under Dynamic Thermo-Mechanical Loads

Khan

2021

Polymers

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Fused deposition modelling (FDM) is the most widely used additive manufacturing process in customised and low-volume production industries due to its safe, fast, effective operation, freedom of customisation, and cost-effectiveness. Many different thermoplastic polymer materials are used in FDM. Acrylonitrile butadiene styrene (ABS) is one of the most commonly used plastics owing to its low cost, high strength and temperature resistance. The fabricated FDM ABS parts commonly work under thermo-mechanical loads in actual practice. For producing FDM ABS components that show high fatigue performance, the 3D printing parameters must be effectively optimized. Hence, this study evaluated the bending fatigue performance for FDM ABS beams under different thermo-mechanical loading conditions with varying printing parameters, including building orientations, nozzle size, and layer thickness. The combination of three building orientations (0°, ±45°, and 90°), three nozzle sizes (0.4, 0.6, and 0.8 mm) and three-layer thicknesses (0.05, 0.1, and 0.15 mm) were tested at different environmental temperatures ranging from 50 to 70 °C. The study attempted to find the optimal combination of the printing parameters to achieve the best fatigue behaviour of the FDM ABS specimen. The experiential results showed that the specimen with 0° building orientation, 0.8 mm filament width, and 0.15 mm layer thickness vibrated for the longest time before the fracture at each temperature. Both a larger nozzle size and thicker layer height can increase the fatigue life. It was concluded that printing defects significantly decreased the fatigue life of the 3D-printed ABS beam.

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“…Usually, tuning these parameters is based on personal experience and know-how, but there is not enough comprehensive information to determine suitable manufacturing parameters [ 70 , 71 ]. Thus, printing parameters were selected from previous experiences of the research group [ 47 , 73 ], corresponding with the best mechanical properties. The printed parameters used are shown in Table 9 .…”

Section: Resultsmentioning

confidence: 99%

Manufacturing and Application of 3D Printed Photo Fenton Reactors for Wastewater Treatment

Esfahani

Zandi

Travieso-Rodríguez

et al. 2021

IJERPH

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Additive manufacturing (AM) or 3D printing offers a new paradigm for designing and developing chemical reactors, in particular, prototypes. The use of 3D printers has been increasing, their performance has been improving, and their price has been reducing. While the general trend is clear, particular applications need to be assessed for their practicality. This study develops and follows a systematic approach to the prototyping of Advanced Oxidation Processes (AOP) reactors. Specifically, this work evaluates and discusses different printable materials in terms of mechanical and chemical resistance to photo-Fenton reactants. Metallic and ceramic materials are shown to be impracticable due to their high printing cost. Polymeric and composite materials are sieved according to criteria such as biodegradability, chemical, thermal, and mechanical resistance. Finally, 3D-printed prototypes are produced and tested in terms of leakage and resistance to the photo-Fenton reacting environment. Polylactic acid (PLA) and wood–PLA composite (Timberfill®) were selected, and lab-scale raceway pond reactors (RPR) were printed accordingly. They were next exposed to H2O2/Fe(II) solutions at pH = 3 ± 0.2 and UV radiation. After 48 h reaction tests, results revealed that the Timberfill® reactor produced higher Total Organic Carbon (TOC) concentrations (9.6 mg·L−1) than that obtained for the PLA reactor (5.5 mg·L−1) and Pyrex® reactor (5.2 mg·L−1), which suggests the interference of Timberfill® with the reaction. The work also considers and discusses further chemical and mechanical criteria that also favor PLA for 3D-printing Fenton and photo-Fenton reactors. Finally, the work also provides a detailed explanation of the printing parameters used and guidelines for preparing prototypes.

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Mechanical Properties of 3D-Printing Polylactic Acid Parts Subjected to Bending Stress and Fatigue Testing

Cited by 36 publications

References 15 publications

Study of the manufacturing process effects of fused filament fabrication and injection molding on tensile properties of composite PLA-wood parts

Study of the manufacturing process effects of fused filament fabrication and injection molding on tensile properties of composite PLA-wood parts

Effects of Printing Parameters on the Fatigue Behaviour of 3D-Printed ABS under Dynamic Thermo-Mechanical Loads

Manufacturing and Application of 3D Printed Photo Fenton Reactors for Wastewater Treatment

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