PSI - Issue 26

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 tr t r l I t rit r i ( ) Available online at www.sciencedirect.com ScienceDirect il l li t . i i t.

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Procedia Structural Integrity 26 (2020) 313–320

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© 2020 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 MedFract1 organizers Nowadays, one of the most studied technologies for obtaining different parts is Additive Manufacturing (AM). Whether it is about plastic or metal materials, AM is used because very complex parts can be obtained, without further technological operations. From all AM technologies, Fused Deposition Modeling (FDM) is the most used all over the world, due to its cost-effective way of printing. FDM is based on the extrusion of a wire, through which a piece is formed by successively depositing layer-by-layer of molten material. This paper experimentally investigates the tensile properties of 3D printed specimens obtained through FDM printing. The influence of spatial printing directio n (0°, 45°, 90°) and size effect (different thickness) on main mechanical properties was investigated. Polylactic acid (PLA) dog bone specimens were adopted for all tensile tests. Experimental tests were carried out at room temperature, according to ISO 527-1 Standard. It was observed that the spatial orientation has less influence on the Young modulus and higher influence on the tensile strength. Furthermore, increasing the number of layers leads to decreasing of both the Young modulus and tensile strength. © 2020 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 MedFract1 organizers Keywords: Additive Manufacturing; FDM; printing directions; tensile properties. l ti t l t i l , i l t t i , it t t t l i l ti . ll t l i , iti li i t t ll t l , t it t ti i ti . i t t i i , t i i i i l iti l l lt t i l. i i t ll i ti t t t il ti i t i t i t i ti . i l ti l i ti i ti , , i t i t t i i i l ti i ti t . l l ti i i t ll t il t t . i t l t t i t t t t , i t t . t t t t ti l i t ti l i l t l i i l t t il t t . t , i i t l l t i t t l t il t t . 02 thors. Published by Else i . . This is an open ti l t li tt :// ti . /li / / . / i i ilit t i : iti f t ri ; ; ri ti ir ti ; t il r rti . The 1 st Mediterranean Conference on Fracture and Structural Integrity, MedFract1 Effect of manufacturing parameters on tensile properties of FDM printed specimens Cristina Vălean a , Liviu Marșavina a, * , Mihai Mărghitaș a , Emanoil Linul a , Javad Razavi b , Filippo Berto b a Department of Mechanics and Strength of Materials, Politehnica University of Timisoara, 1 Mihai Viteazu Avenue, Timisoara 300 222, Romania b Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), Richard Birkelands vei 2b, 7491, Trondheim, Norway ina a, a a d b b a t t f i t t f t i l , lit i i it f i i , i i it , i i , i b t t f i l I t i l i i , i i it f i l ( ), i i l i , , i , Abstract , t t t i t l i t i i i t t i iti t i . t it i t

* Corresponding author. Tel.: +40-256-403577.; fax: +40-256-403523. E-mail address: liviu.marsavina@upt.ro i t r. l.: - - .; f : - - . - il : li i . r i t.r rr

2452-3216 © 2020 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 MedFract1 organizers l i . . i i ti l t li tt :// ti . /li / / . / i i ilit t i - t . li

2452-3216 © 2020 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 MedFract1 organizers 10.1016/j.prostr.2020.06.040