PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 ila le lin t . ie ir t. i i tructural Integrity Procedia 0 (2019) 0– 0

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

ScienceDirect

Procedia Structural Integrity 33 (2021) 89–96

© 2021 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 IGF ExCo Abstract This paper analyses the effect of graphene addition on the fracture behaviour of 3D printed PLA SENB specimens containing crack-like defects. The addition of graphene is assumed to improve the tensile behaviour of 3D printed PLA material, but the integrity of structural components strongly depends on the material fracture resistance. Tensile and fracture SENB specimens have been tested with different raster orientations (0/90, 30/−60 and 45/−45), showing that the effect of graphene addition (1 wt. %) is very sensitive to the raster orientation: this effect is significant for raster orientation 45/-45 and very limited for 0/90 (with 30/-60 providing intermediate results). © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: graphene; fracture behaviour. 1. Introduction Additive manufacturing is a widely used fabrication process these days because it allows singular geometries to be created in an easy way. Several methods can be distinguished in this technology such as: material extrusion, material jetting, power bed fusion, binder jetting, vat photopolymerization, sheet lamination and directed energy deposition, fused deposition modelling (FDM) (material extrusion) being the most used. FDM consists in depositing str ct is r l s s t f t f r iti t fr t r i r f ri t s i s t i i r -li f ts. iti f r is s t i r t t sil ri t t ri l, t t i t rit f str t r l ts str l s t t ri l fr t r r sist . sil fr t r s i s t st it i f r t r st r ri t ti s ( / , / / ), s i t t t f t f r iti ( t. ) is r s siti t t r st r ri t ti : t is f t is si ifi t f r r st r ri t ti /- r li it f r / ( it /- r i i i t r i t r s lts). © 202 e ut ors. Published b E I .V. is is an pen acce s article u der the C Y- -ND license ( t s: /creati ec s. r /lice ses/ - c- / . ) er-re ie tate e t: er-re ie er res si ilit f t e scie tific c i t e f t e I ey ords: graphene; fracture behaviour. . I t ti iti f t ri is i l s f ri ti r s t s s s it l s si l r tri s t r t i s . r l t s isti is i t is t l s s: t ri l tr si , t ri l j ti , r f si , i r j ti , t t l ri ti , s t l i ti ir t r siti , f s siti li ( ) ( t ri l tr si ) i t st s . sists i siti IGF26 - 26th International Conference on Fracture and Structural Integrity Effect of graphene on the fracture behaviour of 3D printed PLA SENB specimens Victor Martinez, Sergio Cicero  , Borja Arroyo. LADICIM (Laboratory of Materials Science and Engineering), University of Cantabria, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Av/Los Castros 44, 39005 Santander, Spain I - t I t r ti l f r r t r tr t r l I t rit i t ti , i i , j . I I ( aboratory of Materials Science and Engin ering), University of Cantabria, E.T.S. de Ingenieros de Ca inos, Canales y Puertos, v/ os Castros 4, 39 05 Santander, Spain i r f

 Corresponding author. Tel.: 34-942-200-017 E-mail address: ciceros@unican.es  o responding author. Tel.: 34-942-2 0-017 - ail a dre s: ciceros unican.es

2452-3216 © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo 2452-3216 © 2021 The Authors. Published by E I B.V. his is an open a ce s article under the C B - - license (h tps: /creativeco ons.org/licenses/by-nc-nd/4.0) er-revie State ent: P er-revie under responsibility of the scientific co i t e of the I Ex o

2452-3216 © 2021 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 IGF ExCo 10.1016/j.prostr.2021.10.013