PSI - Issue 47

Liviu Marsavina et al. / Procedia Structural Integrity 47 (2023) 744–748 Author name / Structural Integrity Procedia 00 (2019) 000–000

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5. Conclusions The current study presents the notch effect on FDM manufactured specimens. The study was conducted on SCB specimens made of PETG, considering four different sizes (R=10, 20, 30. 40 mm) and three types of notches: V-notch, round notch with radius  =0.8 mm, respectively  =2.2 mm. The maximum load and energy to break PETG specimens are required for the round notch with radius  = 2.2 mm and for higher size (R = 40 mm). The inter-layer and cross-layer fracture was observed, corresponding to the minimum and maximum amount of resistance to crack growth. However, the contour layers plays an important role, due to their plastic deformation, for round notch specimens. Acknowledgements The project leading to these results has received funding from the European Union’s Horizon 2020 research and innovation program (H2020-WIDESPREAD-2018, SIRAMM) under grant agreement No. 857124 and was supported by a grant of the Ministry of Education and Research, CNCS/CCCDI - UEFISCDI, project number PN-III-P3-3.6 H2020-2020-0079. References Ahmed, A.A., Susmel. L., 2019. Static assessment of plain/notched polylactide (PLA) 3D ‐ printed with different infill levels: Equivalent homogenised material concept and Theory of Critical Distances, Fatigue & Fracture of Engineering Materials and Structures 42(4): 883-904. Arbeiter, F., Spoerk, M., Wiener. J., Gosch, A., Pinter, G., 2018. Fracture mechanical characterization and lifetime estimation of near homogeneous components produced by fused filament fabrication. Polymer Testing 66, 105-113. Ayatollahi, M.R., Nabavi-Kivi, A., Bahrami, B., Yahya, M.Y., Khosravani, M.R., 2020. The influence of in-plane raster angle on tensile and fracture strengths of 3D-printed PLA specimens. Engineering Fracture Mechanics 237, 107225. Bahrami, B., Ayatollahi, M.R., Sedighi, I., Perez, M., Garcia-Granada, A., 2020. The effect of in-plane layer orientation on mixed-mode I-II fracture behavior of 3D-printed poly-carbonate specimens. Enginering Fracture Mechanics 231, 107018. Gardan J., Makke A., Recho N., 2018. Improving the fracture toughness of 3D printed thermoplastic polymers by fused deposition modeling, International Journal of Fracture, 210, 1–15. Gebisa A.W., Lemu H.G., 2019. Influence of 3D Printing FDM Process Parameters on Tensile Property of ULTEM 9085, Procedia Manufacturing 30, 331–338. Kiendl, J., Gao C., 2020. Controlling toughness and strength of FDM 3D-printed PLA components through the raster layup, Composites Part B 180, 107562. Khosravani M., R., Ali Zolfagharian A., 2020. Fracture and load-carrying capacity of 3D-printed cracked components, Extreme Mechanics Letters 37, 100692. Marsavina, L., Valean, C, Marghitas, M., Linul, E., Javad Razavi, S.M.J., Berto, F., Brighenti, R., 2022. Effect of the manufacturing parameters on the tensile and fracture properties of FDM 3D-printed PLA specimens, Engineering Fracture Mechanics, 274, 108766. Marsavina, L., Sapora, A., Susmel, L., Taylor, D., 2023. The application of the Theory of Critical Distances to nonhomogeneous materials, Fatigue and Fracture of Engineering Materials and Structures, 46, 1314-1329. Masood, S.H., 1996. Intelligent rapid prototyping with fused deposition modelling, Rapid Prototyping Journal 2(1), 24-33. Singh, S., Ramakrishna, S., Berto, F., 2020. 3D Printing of polymer composites: A short review. Design Process Communication 2(2): e97. Valean, C., Mar ș avina, L., M ă rghita ș , M., Linul, E., Razavi, J., Berto, F., Brighenti, R., 2020. The effect of crack insertion for FDM printed PLA materials on Mode I and Mode II fracture toughness. Procedia Structural Integrity 28, 1134-1139. Ahmed, A.A., Susmel, L., 2018. A material length scale–based methodology to assess static strength of notched additively manufactured polylactide (PLA), Fatigue & Fracture of Engineering Materials and Structures 41(10), 2071-2098.