PSI - Issue 34

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 34 (2021) 205–210

The second European Conference on the Structural Integrity of Additively Manufactured Materials Characterization of 3D printed ABS specimens under static and cyclic torsional loadings Carla M. Ferreira 1 , Carlos M.S.Vicente 2 , Manuel Sardinha 2 , Marco Leite 1,2 , Luis Reis 1,2* Abstract In this work, the high cycle fatigue response of fused filament fabrication acrylonitrile butadiene styrene solid cylinder specimens under static and cyclic torsional loadings is studied. A first experimental phase was conducted varying the number of external walls between one, two and three contours and with two different infill patterns – concentric and zigzag. Monotonic torsion tests were performed with this first set of specimens to find the best configuration. The best parameter configuration was chosen for a second experimental phase where specimens were subjected to fully reversed load-controlled loading conditions (R=-1) at room temperature. Seven different stress levels were defined to construct the S-N curve of this 3D printed configuration. The microscopic images of the fractured surfaces were also depicted after monotonic and fatigue tests, aiming to study crack initiation, propagation and to characterize the features of fracture surface. © 2020 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) e 2 2 1,2 1,2* s an cle under the CC B © 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 the scientific committee of the Esiam organisers 1 IST, Instituto Superiror Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal 2 IDMEC, Instituto Superiror Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal Peer-review under responsibility of the scientific committee of the Esiam organisers Keywords: ABS; Additive manufacturing; Fused Deposition Modeling; Torsion, Fatigue 1. Introduction Additive Manufacturing (AM) provides the opportunity to quickly go from design to product phases, allowing the manufacturing of parts with complex geometries that would not be so straightforwardly achieved, and sometimes not even possible with conventional methods. Fused filament fabrication (FFF) has grown widely in the last years and along with its improvements, the technology has enable the production of robust, durable, and dimensionally stable prototypes, conceptual models, and end-use functional parts (Letcher et al., 2014).

* Corresponding author. E-mail address: luis.g.reis@tecnico.ulisboa.pt

2452-3216 © 2020 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 the scientific committee of the Esiam organisers

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 the scientific committee of the Esiam organisers 10.1016/j.prostr.2021.12.030