PSI - Issue 37

ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceD rect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 37 (2022) 97–104

ICSI 2021 The 4th International Conference on Structural Integrity Fracture studies of 3D-printed PLA-wood composite Mohammad Reza Khosravani*, Tamara Reinicke Chair of Product Development, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, German ICSI 2021 The 4th International Conference on Structural Integrity Fracture studies of 3D-printed PLA-wood composite Mohammad Reza Khosravani*, Tamara Reinicke Chair of Product Development, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, German

Abstract Abstract

© 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 Pedro Miguel Guimaraes Pires Moreira Additive manufacturing (AM) has shown extraordinary growth over the past few years. In this three-dimensional (3D) printing, the final products are made by adding material layer-upon-layer. Although mechanical behavior of 3D-printed Polylactic Acid (PLA) parts have been investigated in several research works, there are a few studies on the mechanical characterization of 3D printed PLA-wood composites. In the present study, fracture behavior of intact and defected PLA-wood composite specimens were investigated. To this aim, wood-reinforced PLA material was used to print test coupons. It should be pointed out that the missing extrudates were considered as an intentional defect in the defected specimens. In this study, both groups of intact and defected composite specimens were printed with different raster directions. Based on a series of tensile tests, fracture load and stiffness of the examined parts were determined. Moreover, effects of raster orientations on the fracture behavior of the intact and defected parts were investigated. In this study, the obtained results of tests on intact and defected specimens were compared. This comparison indicated impacts of the defects on the fracture behavior of additively manufactured composite. © 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 Pedro Miguel Guimaraes Pires Moreira Keywords: Additive manufacturing; fracture behavior; strength; PLA-wood; Fused deposition modeling. 1. Introduction Combining Computer Aided Design (CAD) and Computer Aided Manufacturing (CAM) technologies, items can be fabricated via Additive Manufacturing (AM) technology without traditional cutting techniques. AM also known as three-dimensional (3D) printing is a manufacturing process for fabrication of parts from a CAD model based on deposition of material layer by layer. This technology indicated several advantages compared to traditional Additive manufacturing (AM) has shown extraordinary growth over the past few years. In this three-dimensional (3D) printing, the final prod cts are made by dding materi l layer-upon-layer. Alt ough m chanical behavior of 3D-printed Polylactic Acid (PLA) parts have be n inv stigate in several research works, there are a few studies on the mechanical characterization of 3D printed PLA-wood composites. In the pr sent study, fracture behavior of intact and efected PLA-wood composite specimens were investigated. T this aim, wood-reinforced PLA material was used to pri t test coupons. It should be pointed out that the missing extrudates were considered as an i tentional defect in the defected s ecimens. In this study, both groups of intact and defected composite specime were printed with different raster directions. Bas d on a series of tensile tests, fracture load and stiffness of the examined parts wer determined. Moreov r, effects of raster orientations on the fracture b havior of the intact and defected parts were investigated. In this study, the btained result f tests on intact and defected specimens were compared. This comparison indicated impacts of the defects on the fracture behavior f additively manufactured composite. © 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 Pedro Miguel Guimaraes Pires Moreira Keywords: Additive manufacturing; fracture behavior; strength; PLA-wood; Fused deposition modeling. 1. Introduction Combining Computer Aided Design (CAD) and Computer Aided Manufacturing (CAM) technologies, items can be fabricated via Addi ive Manufacturi g ( M techn logy without tradition l cutting techniques. AM al o known s three-d mensional (3D) printi g is a manufacturing pr cess for fabrica of parts from a CAD model based on deposit on of material layer by l yer. This technol gy indicated several advantages compared to traditional

* Corresponding author. E-mail address: mohammadreza.khosravani@uni-siegen.de * Corresponding author. E-mail address: mohammadreza.khosravani@uni-siegen.de

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 Pedro Miguel Guimaraes Pires Moreira 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 Pedro Miguel Guimaraes Pires Moreira

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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.064