PSI - Issue 33

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 33 (2021) 714–723

© 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 In the paper, experimental compression tests are carried out on cubic specimens in lattice structures produced with a carbon nylon filament through a Fused Deposition Modeling process and with an AlSi10Mg alloy through a Selective Laser Melting process. The tests on carbon nylon specimens are carried out to assess the cell geometry ensuring the highest energy absorption among five selected cell geometries. Subsequently, a Finite Element (FE) model of the lattice structure specimens is created by using 1D beam elements and experimentally validated with the results obtained by testing manufactured specimens. The activity in the paper proves the effectiveness of models with 1D elements for the simulation of the mechanical response of the lattice structures and the importance of validating FE models to assess their real failure mode. © 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: Additive Manufacturing (AM); Fused Deposition Modeling (FDM); Selective Laser Melting (SLM); lattice structures; Finite Element Analysis; lighweigth design; energy absorbtion. / IGF26 - 26th International Conference on Fracture and Structural Integrity Numerical modelling of the mechanical response of lattice structures produced through AM M. Della Ripa a , D.S. Paolino a , A. Amorese b , A. Tridello a * a Politecnico di Torino, Department of Mechanical and Aerospace Engineering, Corso Duca degli Abruzzi 24, 10129 Turin, Italy b Altair Engineering S.r.l, Via Livorno 60, 10144, Turin, Italy Abstract In the last years, with the development of Additive Manufacturing processes, the research on the mechanical behaviour of lattice structures has gained significant attention. Depending on the application, the mechanical properties of the unit cell can be modified by varying its geometry. The cell geometry is generally designed through Finite Element Analyses. However, the simulation of the mechanical response of components made of lattice structures can be rather complex, due to the long computation time. Therefore, efficient simplified models should be employed, but, in this case, an experimental validation is required.

* Corresponding author. Tel.: +39 011 0906913; E-mail address: andrea.tridello@polito.it

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 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.2021.10.079