PSI - Issue 47

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ScienceDirect

Procedia Structural Integrity 47 (2023) 454–459 Structural Integrity Procedia 00 (2023) 000–000 Structural Integrity Procedia 00 (2023) 000–000

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© 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 IGF27 chairpersons © 2023 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 the IGF27 chairpersons. Keywords: Additive manufacturing; fracture toughness; fused deposition modeling; printing parameters; fracture behavior. Abstract Additive manufacturing (AM) has been introduced for production of prototypes, but it has been recently used for fabrication of end use products. Therefore, the mechanical strength and structural integrity of 3D-printed parts have become of significant importance. AM also known as three-dimensional (3D) printing, has been considered as a revolutionary manufacturing process that can create geometrically complex parts through a digital model. In the current study, we investigate e ff ects of printing parameters on the fracture toughness of 3D-printed polymer parts. To this aim, polylactic acid (PLA) material was used to fabricate specimens based on the fused deposition modeling process. The specimens were printed with di ff erent orientations at di ff erent printing speeds. Particularly, the specimens were printed with 45 ◦ / -45 ◦ and0 ◦ / 90 ◦ filament orientations at printing speed of 20 mm / s and80mm / s. A series of compact tension tests was conducted and linear elastic fracture mechanics approach was used to determine the fracture toughness values for each group of specimen. The experimental results indicate that the lowest fracture load was belong to the specimens printed at the highest speed. The reported results of this study can be used for future design and next computational modeling of 3D-printed PLA parts. © 2023 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 the IGF27 chairpersons. Keywords: Additive manufacturing; fracture toughness; fused deposition modeling; printing parameters; fracture behavior. 27th International Conference on Fracture and Structural Integrity (IGF27) E ff ects of printing parameters on the fracture toughness of 3D-printed polymer parts Mohammad Reza Khosravani ∗ , Tamara Reinicke Chair of Product Development, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, Germany Abstract Additive manufacturing (AM) has been introduced for production of prototypes, but it has been recently used for fabrication of end use products. Therefore, the mechanical strength and structural integrity of 3D-printed parts have become of significant importance. AM also known as three-dimensional (3D) printing, has been considered as a revolutionary manufacturing process that can create geometrically complex parts through a digital model. In the current study, we investigate e ff ects of printing parameters on the fracture toughness of 3D-printed polymer parts. To this aim, polylactic acid (PLA) material was used to fabricate specimens based on the fused deposition modeling process. The specimens were printed with di ff erent orientations at di ff erent printing speeds. Particularly, the specimens were printed with 45 ◦ / -45 ◦ and0 ◦ / 90 ◦ filament orientations at printing speed of 20 mm / s and80mm / s. A series of compact tension tests was conducted and linear elastic fracture mechanics approach was used to determine the fracture toughness values for each group of specimen. The experimental results indicate that the lowest fracture load was belong to the specimens printed at the highest speed. The reported results of this study can be used for future design and next computational modeling of 3D-printed PLA parts. 27th International Conference on Fracture and Structural Integrity (IGF27) E ff ects of printing parameters on the fracture toughness of 3D-printed polymer parts Mohammad Reza Khosravani ∗ , Tamara Reinicke Chair of Product Development, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, Germany

1. Introduction 1. Introduction

Additive manufacturing (AM) covers a variety of techniques for fabricating custom-made structural elements. AM is more commonly spoken of as three-dimensional (3D) printing, has become an indispensable part of modern product development due to its unique advantages. For example, reduced material consumption, optimized structural geome tries, less wastage, unrivalled design freedom, mixed materials fabrication, ease of production in remote locations, short lead times, and hybrid construction are benefits of this manufacturing process (Ngo et al., 2018; Struzziero et al., 2023). Although conventional manufacturing process are subtractive manufacturing methods involves removing parts of a block of material in order to create the desired shape, 3D printing is based on an incremental layer-by layer Additive manufacturing (AM) covers a variety of techniques for fabricating custom-made structural elements. AM is more commonly spoken of as three-dimensional (3D) printing, has become an indispensable part of modern product development due to its unique advantages. For example, reduced material consumption, optimized structural geome tries, less wastage, unrivalled design freedom, mixed materials fabrication, ease of production in remote locations, short lead times, and hybrid construction are benefits of this manufacturing process (Ngo et al., 2018; Struzziero et al., 2023). Although conventional manufacturing process are subtractive manufacturing methods involves removing parts of a block of material in order to create the desired shape, 3D printing is based on an incremental layer-by layer

∗ Corresponding author. Tel.: + 49(0271)-740-2863 E-mail address: mohammadreza.khosravani@uni-siegen.de ∗ Corresponding author. Tel.: + 49(0271)-740-2863 E-mail address: mohammadreza.khosravani@uni-siegen.de

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 IGF27 chairpersons 10.1016/j.prostr.2023.07.079 2210-7843 © 2023 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 the IGF27 chairpersons. 2210-7843 © 2023 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 the IGF27 chairpersons.