PSI - Issue 41

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ScienceDirect

Procedia Structural Integrity 41 (2022) 664–669 Procedia Structural Integrity 00 (2022) 000–000 Procedia Str ctural Integrity 00 (2022) 000–000

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

© 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 MedFract2Guest Editors. Abstract Fused Deposition Modeling (FDM) as one of the most popular processes of Additive Manufacturing (AM), o ff ers flexibility in manufacturing of parts with complex geometries. Although three-dimensional (3D) printing was initially used for rapid prototyp ing, currently it is being utilized in manufacturing of final products. Since some 3D-printed plates with open-holes might be subjected to the tensile loads during their operation, study the mechanical strength of these parts is a necessity. In the current study, the specimens have been fabricated by means of the FDM technique using Polylactic Acid (PLA) material. As ratio of the specimen width to the hole diameter has influence on the structural integrity of the part, we have fabricated specimens with di ff erent hole diameters. A series of tensile tests under static loading conditions was conducted to determine strength and e ff ect of the the ratio of the specimen width to the hole diameter on the structural integrity of the 3D-printed PLA plate. Moreover, parallel to experimental tests, numerical simulations are performed and a good agreement between experimental finding and simulation results is obtained. The outcome of this study can be used for design of 3D-printed polymer plates with open-hole and improvement of their mechanical strength and structural integrity. c 2021 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 / ) er-review under responsibility of edFract2 Organizers. Keywords: Additive manufacturing; defect; thermal ageing; fracture behavior; tensile strength. 2nd Mediterranean Conference on Fracture and Structural Integrity echanical strength of 3D-printed open hole polymer plates Mohammad Reza Khosravani ∗ , Tamara Reinicke Chair of Product Development, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, Germany Abstract Fused Deposition Modeling (FDM) as one of the most popular processes of Additive Manufacturing (AM), o ff ers flexibility in manufacturing of parts with complex geometries. Although three-dimensional (3D) printing was initially used for rapid prototyp ing, currently it is being utilized in manufacturing of final products. Since some 3D-printed plates with open-holes might be subjected to the tensile loads during their operation, study the mechanical strength of these parts is a necessity. In the current study, the specimens have been fabricated by means of the FDM technique using Polylactic Acid (PLA) material. As ratio of the specimen width to the hole diameter has influence on the structural integrity of the part, we have fabricated specimens with di ff erent hole diameters. A series of tensile tests under static loading conditions was conducted to determine strength and e ff ect of the the ratio of the specimen width to the hole diameter on the structural integrity of the 3D-printed PLA plate. Moreover, parallel to experimental tests, numerical simulations are performed and a good agreement between experimental finding and simulation results is obtained. The outcome of this study can be used for design of 3D-printed polymer plates with open-hole and improvement of their mechanical strength and structural integrity. c 2021 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 MedFract2 Organizers. Keywords: Additive manufacturing; defect; thermal ageing; fracture behavior; tensile strength. 2nd Mediterranean Conference on Fracture and Structural Integrity Mechanical strength of 3D-printed open hole polymer plates 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 an opportunity for fabrication of various components which has significant influ ence on the design, manufacturing process, cost, and business model. AM known also known as three-dimensional (3D) printing is based on printing layer-upon-layer using di ff erent techniques (Gibson et al., 2015). According to ASTM F2792 (ASTM F2792, 2012), 3D printing technology is classified into seven categories: binder jetting, ma terial extrusion, direct energy deposition, material jetting, sheet lamination, powder bed fusion, and vat photopoly merization. Di ff erent 3D printing techniques can be used in fabrication utilizing various materials such as polymers, metals and ceramic powder. Each one has its own advantages and disadvantages. The novel engineering manufactur ing process in 3D printing, confirmed some advantages of this technology, such as savings in costs and time compared Additive manufacturing (AM) is an opportunity for fabrication of various components which has significant influ ence on the design, manufacturing process, cost, and business model. AM known also known as three-dimensional (3D) printing is based on printing layer-upon-layer using di ff erent techniques (Gibson et al., 2015). According to ASTM F2792 (ASTM F2792, 2012), 3D printing technology is classified into seven categories: binder jetting, ma terial extrusion, direct energy deposition, material jetting, sheet lamination, powder bed fusion, and vat photopoly merization. Di ff erent 3D printing techniques can be used in fabrication utilizing various materials such as polymers, metals and ceramic powder. Each one has its own advantages and disadvantages. The novel engineering manufactur ing process in 3D printing, confirmed some advantages of this technology, such as savings in costs and time compared

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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.075 ∗ Corresponding author. Tel.: + 49(0271)-740-2863 E-mail address: mohammadreza.khosravani@uni-siegen.de 2210-7843 c 2021 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 MedFract2 Organizers. ∗ Corresponding author. Tel.: + 49(0271)-740-2863 E-mail address: mohammadreza.khosravani@uni-siegen.de 2210-7843 c 2021 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 MedFract2 Organizers.