PSI - Issue 46

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 46 (2023) 125–130

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers Abstract In this paper, the influence of the infill volume percentage on fatigue life and failure types of 3D-printed gears made of polylactic acid (PLA) is studied. The experiments were conducted using a custom-made gear testing device, where the specimens were tested at the same torque and rotational speed. It has been shown that the fatigue life of gears made of PLA increases significantly with the increase in infill volume percentage. Different types of gear failures have been observed depending on the volume percentage. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers. Keywords: Failure analysis, gears, infill percentage, additive manufacturing 1. Introduction Additive manufacturing (AM) allows the mass reduction of machine elements while retaining needed stiffness and load capacity. New manufacturing technologies, such as additive manufacturing, also called 3D printing (Gibson et al. 2021, Khosravani et al. 2021, Dundović et al. 2021, Gljušćić et al. 2021, Milovanović et al. 2021, Kastratović et al. 2021), make it possible to produce machine elements as an outer shell with different infill structures. Current research on additive manufacturing of gears is mostly focused on the manufacturing of polymer gears. Zhang et al. 5th International Conference on Structural Integrity and Durability, ICSID 2021 Experimental failure analysis of polylactic acid gears made by additive manufacturing Adis J. Muminović a , Sanjin Braut b *, Željko Božić c , Nedim Pervan a , Ante Skoblar b a University of Sarajevo, Faculty of Mechanical Engineering, Vilsonovo šetalište no. 9., 71 000 Sarajevo, Bosnia and Herzegovina b University of Rijeka, Faculty of Engineering, Vukovarska 58, 51000 Rijeka, Croatia c University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture., I. Lu č i ć a 5, 10000 Zagreb, Croatia

* Corresponding author. Tel.: +385 51 651 502 E-mail address: sanjin.braut@riteh.hr

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers 10.1016/j.prostr.2023.06.021