PSI - Issue 53

ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 53 (2024) 97–111

© 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 the scientific committee of the ESIAM23 chairpersons Abstract Additive manufacturing (AM) technology, particularly for polymers, as versatile technology, becomes increasingly important in various fields, especially in medical and healthcare. The wide usage of 3D printed parts and layer-by-layer nature of them introduces unique considerations for potential fatigue-related issues, therefore, fatigue crack propagation and material failure are significant concerns when it comes to the long-term performance and reliability of such components. In this context, thermography can help identify areas of localized heating that could indicate the initiation and propagation of fatigue cracks. Energy Methods are time efficient and requires fewer specimens compared to conventional fatigue testing methods which can provide valuable insights to the design and printing parameters to enhance the fatigue performance. In this research, after modelling different types notched dog-bone specimens, they were printed with FDM printer using PLA material and similar setting parameters. After that, 3D printed specimens were subjected to static tensile loading and stepwise fatigue tests monitoring the energy release to assess their fatigue behaviour. Additionally, we employed ACP module in Ansys to model notched specimens, calculating stresses within different layers. © 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 the scientific committee of the ESIAM23 chairpersons Keywords: fatigue assessment;notch;energy release;infrared thermography;static thermographic method Abstract Additive manufacturing (AM) technology, particularly for polymers, as versatile technology, becomes increasingly important in various fields, especially in medical and healthcare. The wide usage of 3D printed parts and layer-by-layer nature of them introduces unique considerations for potential fatigue-related issues, therefore, fatigue crack propagation and material failure are significant concerns when it comes to the long-term performance and reliability of such components. In this context, thermography can help identify areas of localized heating that could indicate the initiation and propagation of fatigue cracks. Energy Methods are time efficient and requires fewer specimens compared to conventional fatigue testing methods which can provide valuable insights to the design and printing parameters to enhance the fatigue performance. In this research, after modelling different types notched dog-bone specimens, they were printed with FDM printer using PLA material and similar setting parameters. After that, 3D printed specimens were subjected to static tensile loading and stepwise fatigue tests monitoring the energy release to assess their fatigue behaviour. Additionally, we employed ACP module in Ansys to model notched specimens, calculating stresses within different layers. © 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 the scientific committee of the ESIAM23 chairpersons Keywords: fatigue assessment;notch;energy release;infrared thermography;static thermographic method Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Fatigue investigation of 3D-printed notched PLA specimens by Thermographic methods with FEM Simulation Integration Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Fatigue investigation of 3D-printed notched PLA specimens by Thermographic methods with FEM Simulation Integration Reza Ahmadi a *, Danilo D’Andrea a , Dario Santonocito a , Giacomo Risitano a Reza Ahmadi a *, Danilo D’Andrea a , Dario Santonocito a , Giacomo Risitano a a University of Messina, Department of Engineering, Contrada di Dio, 98166 Messina, Italy a University of Messina, Department of Engineering, Contrada di Dio, 98166 Messina, Italy

* Corresponding author: E-mail address: reza.ahmadi@studenti.unime.it * Corresponding author: E-mail address: reza.ahmadi@studenti.unime.it

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 the scientific committee of the ESIAM23 chairpersons 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 the scientific committee of the ESIAM23 chairpersons

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 the scientific committee of the ESIAM23 chairpersons 10.1016/j.prostr.2024.01.013