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Article

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

by
J. Antonio Travieso-Rodriguez
1,*,
Ramon Jerez-Mesa
2,
Jordi Llumà
3,
Oriol Traver-Ramos
1,
Giovanni Gomez-Gras
4 and
Joan Josep Roa Rovira
3
1
Mechanical Engineering Department, Escola d’Enginyeria de Barcelona Est, Universitat Politècnica de Catalunya, Avinguda d’Eduard Maristany, 10–14, 08019 Barcelona, Spain
2
Engineering Department, Faculty of Sciences and Technology, Universitat de Vic—Universitat Central de Catalunya, C. Laura, 13 Vic, 08500 Barcelona, Spain
3
Materials Science and Metallurgical Engineering Department, Universitat Politècnica de Catalunya, Escola d’Enginyeria de Barcelona Est, Avinguda d’Eduard Maristany, 10–14, 08019 Barcelona, Spain
4
Industrial Engineering Department, IQS School of Engineering, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Materials 2019, 12(23), 3859; https://doi.org/10.3390/ma12233859
Submission received: 25 October 2019 / Revised: 18 November 2019 / Accepted: 19 November 2019 / Published: 22 November 2019
(This article belongs to the Special Issue Special Issue of the Manufacturing Engineering Society 2019 (SIMES-2019))
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Abstract

This paper aims to analyse the mechanical properties response of polylactic acid (PLA) parts manufactured through fused filament fabrication. The influence of six manufacturing factors (layer height, filament width, fill density, layer orientation, printing velocity, and infill pattern) on the flexural resistance of PLA specimens is studied through an L27 Taguchi experimental array. Different geometries were tested on a four-point bending machine and on a rotating bending machine. From the first experimental phase, an optimal set of parameters deriving in the highest flexural resistance was determined. The results show that layer orientation is the most influential parameter, followed by layer height, filament width, and printing velocity, whereas the fill density and infill pattern show no significant influence. Finally, the fatigue fracture behaviour is evaluated and compared with that of previous studies’ results, in order to present a comprehensive study of the mechanical properties of the material under different kind of solicitations.
Keywords: additive manufacturing; 3D printing; fused filament fabrication; flexural properties; fatigue; PLA additive manufacturing; 3D printing; fused filament fabrication; flexural properties; fatigue; PLA
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MDPI and ACS Style

Travieso-Rodriguez, J.A.; Jerez-Mesa, R.; Llumà, J.; Traver-Ramos, O.; Gomez-Gras, G.; Roa Rovira, J.J. Mechanical Properties of 3D-Printing Polylactic Acid Parts subjected to Bending Stress and Fatigue Testing. Materials 2019, 12, 3859. https://doi.org/10.3390/ma12233859

AMA Style

Travieso-Rodriguez JA, Jerez-Mesa R, Llumà J, Traver-Ramos O, Gomez-Gras G, Roa Rovira JJ. Mechanical Properties of 3D-Printing Polylactic Acid Parts subjected to Bending Stress and Fatigue Testing. Materials. 2019; 12(23):3859. https://doi.org/10.3390/ma12233859

Chicago/Turabian Style

Travieso-Rodriguez, J. Antonio, Ramon Jerez-Mesa, Jordi Llumà, Oriol Traver-Ramos, Giovanni Gomez-Gras, and Joan Josep Roa Rovira. 2019. "Mechanical Properties of 3D-Printing Polylactic Acid Parts subjected to Bending Stress and Fatigue Testing" Materials 12, no. 23: 3859. https://doi.org/10.3390/ma12233859

APA Style

Travieso-Rodriguez, J. A., Jerez-Mesa, R., Llumà, J., Traver-Ramos, O., Gomez-Gras, G., & Roa Rovira, J. J. (2019). Mechanical Properties of 3D-Printing Polylactic Acid Parts subjected to Bending Stress and Fatigue Testing. Materials, 12(23), 3859. https://doi.org/10.3390/ma12233859

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