PSI - Issue 51

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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 51 (2023) 173–178

© 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 ICSID 2022 Organizers The aim of the article was to assess the influence of the notch on the mechanical properties of composite materials produced on the basis of 3D printing. The results show the dependence of the laminate layering on the direction of loading. The impact toughness decreased by 35 % on notched specimens in the case of perpendicular direction of loading to laminas layering. In the case of direct loading to laminas layering, notched specimens achieved higher impact toughness than specimens without notch. © 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 ICSID 2022 Organizers Keywords: Additive manufacturing; Charpy impact test; notch; loading orientation Abstract Additive production of composites is a relatively new technology, the development of which currently allows the printing of long-fibre reinforced components. The rapid development technology necessarily requires finding a suitable application. Mechanical tests are performed to determine the material characteristics and behaviour of the material under different types of loading for these reasons. Several studies have been published dealing with tensile and bending tests of additive produced composites. The authors have performed a Charpy impact test on the same materials in the past. The influence of printing parameters (infill type, reinforcement type, lamina thickness, infill orientation) and the orientation of the load against the position of the laminas in the composite on the mechanical properties (achieved values of impact toughness) were identified by experimental measurements. The first phase was performed on un-notched specimens. In the second phase, further research and experimental measurements were performed on notched specimens. The aim of the article was to assess the influence of the notch on the mechanical properties of composite materials produced on the basis of 3D printing. The results show the dependence of the laminate layering on the direction of loading. The impact toughness decreased by 35 % on notched specimens in the case of perpendicular direction of loading to laminas layering. In the case of direct loading to laminas layering, notched specimens achieved higher impact toughness than specimens without notch. © 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 ICSID 2022 Organizers Keywords: Additive manufacturing; Charpy impact test; notch; loading orientation 6th International Conference on Structural Integrity and Durability (ICSID 2022) Influence of notch and load direction on impact toughness of fibre reinforced composites produced by 3D printing 6th International Conference on Structural Integrity and Durability (ICSID 2022) Influence of notch and load direction on impact toughness of fibre reinforced composites produced by 3D printing M. Vaško a *, J. Majko a , M. Handrik a , A. Vaško a , M. Sága a a University of Žilina, Faculty of Mech. Engineering, Univerzitná 1, 010 26 Žilina, Slovakia M. Vaško a *, J. Majko a , M. Handrik a , A. Vaško a , M. Sága a a University of Žilina, Faculty of Mech. Engineering, Univerzitná 1, 010 26 Žilina, Slovakia Abstract Additive production of composites is a relatively new technology, the development of which currently allows the printing of long-fibre reinforced components. The rapid development technology necessarily requires finding a suitable application. Mechanical tests are performed to determine the material characteristics and behaviour of the material under different types of loading for these reasons. Several studies have been published dealing with tensile and bending tests of additive produced composites. The authors have performed a Charpy impact test on the same materials in the past. The influence of printing parameters (infill type, reinforcement type, lamina thickness, infill orientation) and the orientation of the load against the position of the laminas in the composite on the mechanical properties (achieved values of impact toughness) were identified by experimental measurements. The first phase was performed on un-notched specimens. In the second phase, further research and experimental measurements were performed on notched specimens.

* Corresponding author. Tel.: +421-41-513-2981. E-mail address: milan.vasko@fstroj.uniza.sk * Corresponding author. Tel.: +421-41-513-2981. E-mail address: milan.vasko@fstroj.uniza.sk

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 ICSID 2022 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 the scientific committee of the ICSID 2022 Organizers

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