PSI - Issue 53

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ScienceDirect

Procedia Structural Integrity 53 (2024) 264–269 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 scientific committee of the ESIAM23 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 scientific committee of the ESIAM23 chairpersons. Keywords: Additive manufacturing; Fracture; Notch; Thermal aging; FDM. Abstract Based on advantages of additive manufacturing (AM), this technology is becoming one of the most popular and preferable manufac turing processes in di ff erent industries. Although AM was introduced for fabrication of prototypes, it has been used for production of end-use products. Consequently, the mechanical strength of AMed parts has become of significant importance. In the present study, influence of geometry and thermal aging on the mechanical strength of AMed parts has been investigated. To this aim, polylactic acid material was used to print specimens based on fused deposition modeling process. Since geometry of AMed parts has e ff ect on their mechanical behavior, the specimens with three di ff erent geometries are fabricated and examined. Particularly, dumbbell-shaped, smooth, and V-notched specimens were subjected to tensile load under static loading conditions. In addition, in order to evaluate influence of thermal environment, we carried out an accelerated thermal aging within temperatures of -5 ◦ C to 35 ◦ C, which is below glass temperature of the examined material. Experimental results showed di ff erent fracture behaviors and tensile strength due to the di ff erent geometries. Moreover, based on a series of tests, the failure behavior of original and aged speci mens are determined. The outcomes of this study confirmed that the geometrical appearance and environmental working conditions of AMed parts must be taken into account in the design of these components. © 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 scientific committee of the ESIAM23 chairpersons. Keywords: Additive manufacturing; Fracture; Notch; Thermal aging; FDM. Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) E ff ects of geometry and thermal aging on the strength 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 Based on advantages of additive manufacturing (AM), this technology is becoming one of the most popular and preferable manufac turing processes in di ff erent industries. Although AM was introduced for fabrication of prototypes, it has been used for production of end-use products. Consequently, the mechanical strength of AMed parts has become of significant importance. In the present study, influence of geometry and thermal aging on the mechanical strength of AMed parts has been investigated. To this aim, polylactic acid material was used to print specimens based on fused deposition modeling process. Since geometry of AMed parts has e ff ect on their mechanical behavior, the specimens with three di ff erent geometries are fabricated and examined. Particularly, dumbbell-shaped, smooth, and V-notched specimens were subjected to tensile load under static loading conditions. In addition, in order to evaluate influence of thermal environment, we carried out an accelerated thermal aging within temperatures of -5 ◦ C to 35 ◦ C, which is below glass temperature of the examined material. Experimental results showed di ff erent fracture behaviors and tensile strength due to the di ff erent geometries. Moreover, based on a series of tests, the failure behavior of original and aged speci mens are determined. The outcomes of this study confirmed that the geometrical appearance and environmental working conditions of AMed parts must be taken into account in the design of these components. Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) E ff ects of geometry and thermal aging on the strength 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) is a material addition technique which produce physical parts from the digital data (Ngo et al., 2018). AM also widely known as three-dimensional (3D) printing has proved its advantages compared to conventional manufacturing processes. Mass customization, a high flexibility in product design, and minimizing waste materials are examples of advantages of this manufacturing process. Due to the benefits and advantages of 3D printing, it has been used for fabrication of components in divers applications, such as medicine (Kalyan et al., 2023), aerospace Additive Manufacturing (AM) is a material addition technique which produce physical parts from the digital data (Ngo et al., 2018). AM also widely known as three-dimensional (3D) printing has proved its advantages compared to conventional manufacturing processes. Mass customization, a high flexibility in product design, and minimizing waste materials are examples of advantages of this manufacturing process. Due to the benefits and advantages of 3D printing, it has been used for fabrication of components in divers applications, such as medicine (Kalyan et al., 2023), aerospace

∗ Corresponding author: E-mail address: mohammdreza.khosravani@uni-siegen.de ∗ Corresponding author: E-mail address: mohammdreza.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 scientific committee of the ESIAM23 chairpersons 10.1016/j.prostr.2024.01.032 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 scientific committee of the ESIAM23 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 scientific committee of the ESIAM23 chairpersons.