PSI - Issue 28

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 28 (2020) 667–674

1st Virtual European Conference on Fracture Potentiality of hybrid structures in CFRP and additive manufactured metal octet-truss lattice Costanzo Bellini a *, Rosario Borrelli b , Vittorio Di Cocco a , Stefania Franchitti b , Francesco Iacoviello a and Luca Sorrentino a Costanzo Bellini *, Rosario Borrelli b a

a University of Cassino and Southern Lazio, via G. Di Biasio 43, 03043 Cassino, Italy b Manufacturing Processes on Metallic Materials Lab., CIRA, Via Maiorise, Capua, Italy

© 2020 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 European Structural Integrity Society (ESIS) ExCo Abstract Lattice structures are very light and strong, but they need to be wrapped with skin to evenly distribute the loads over the entire surface of the structure. Considering additive manufacturing as a process to produce lattice structures, the easiest way to add the skin is its building together with the lattice core. However, if the core is made of metal, this solution leads to weight increase, since the skin should be made of the same material as the core. Therefore, in this work, the flexural behaviour of two kinds of structures, with titanium alloy skin or carbon fibre skin and a titanium alloy lattice core produced by Electron Beam Melting technology, was investigated. The experimental tests found that the structure with carbon fibre composite skins, even if it was not so performing as the other ones, had great potential due to its lightness. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Hybrid material; Additive manufactured lattice; Mechanical behaviour 1. Introduction The need for reducing the weight of aircrafts to decrease the pollutant emissions or to increase the payload leads the aeronautical manufacturer to search for lighter and stronger materials. In fact, composite materials are more and e D

* Corresponding author. Tel.: +39-0776-2993698; fax: +39-0776-2993886. E-mail address: costanzo.bellini@unicas.it

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.077