PSI - Issue 42

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

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Procedia Structural Integrity 42 (2022) 3–8

© 2022 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 23 European Conference on Fracture – ECF23 Abstract Rapid manufacturing of individualized products made from plastics using 3D printing technologies will now become a highly growing market. However, the influence of morphology and processing parameters (such as speed of printing and screen angle) on the fracture mechanics performance of such additively produced materials is still inadequately investigated. Therefore, the effect of processing parameters, loading rate (impact and quasi-static loading) on the crack-growth behaviour (unstable and stable crack growth) of thermoplastic polymers (acrylonitrile – butadiene – styrene copolymer (ABS) and polycarbonate (PC)) has been analyzed using instrumented Charpy impact test, essential-work-of-fracture approach and crack-resistance-curve concept combined with non-destructive methods. Whereas the printing speed doesn’t affect the fracture mechanics parameters the building orientation is clearly affecting the fracture performance. Here the orientation 45°/45° reveals higher toughness than the orientation 0°/90° due to mode II portions during the fracture process. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: thermoplastic polymers; 3D printing; crack growth behaviour 2 u b i lse h s s n pen ce ti d th - D li e ( ttp //c i e m o s/ 23 European Conference on Fracture - ECF23 Fracture mechanics performance of 3D printed amorphous thermoplastic polymers at impact and quasi-static loading Ralf Lach a *, Andreas Schmidtke b,c , Luis Castro Key a,b , Beate Langer b , Wolfgang Grellmann a a Polymer Service GmbH Merseburg (PSM), Geusaer Straße 81f, 06217 Merseburg, Germany b Hochschule Merseburg (HoMe), Fachbereich Ingenieur- und Naturwissenschaften (INW), Eberhard-Leibnitz-Straße 2, 06217 Merseburg, Germany c Martin-Luther-Universität Halle- Wittenberg (MLU), Internationaler Studiengang „Polymer Materials Science“, Von -Danckelmann-Platz 4, 06120 Halle (Saale), Germany

* Corresponding author. Tel.: +49 3461 30889-67; fax: +49 3461 30889-99. E-mail address: ralf.lach@psm-merseburg.de

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

2452-3216 © 2022 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 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.11.002