PSI - Issue 41

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Sci nceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Procedia Structural Integrity 41 (2022) 470–485

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2452-3216 © 2022 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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.053 2452-3216 © 2022 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 MedFract2Guest Editors. 2452-3216 © 2022 T e 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 MedFract2Guest Editors. © 2022 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 MedFract2Guest Editors. The experimental tests results were used for the validation of a non-linear finite element model of both G7 and IWP structures with the application of the Johnson-Cook plasticity model. Different cell configurations were obtained by varying the relative density and the cell diameter, in order to evaluate the cell size effect on the mechanical properties. G7 unit cell meets the mechanical and morphological requirements for the application in the biomechanical field. However, the analysis of the collapse mode showed that an improvement of the mechanical behaviour is required. The numerical analyses performed on the IWP unit cell allowed to assess that the structure is suitable for the production of biomedical devices. experimental tests results were used for the validation of a non-linear finite element model of both G7 and IWP structures with the application of the Johnson-Cook plasticity mod l. Different cell configurations were obtained by varying the relative density and th cell diameter, in order to valuate the cell size effect on the mechanical properties. G7 unit cell meets the mechanical and m rp ologic l requireme ts for the application in the biomechanical field. However, the analysis of the collapse mode showed that an improvement of the mechanical behaviour is required. The numerical analyses performed on the IWP unit cell allowed to assess that the structure is suit ble for the production of biomedical devices. Abstract 3D periodic cellular solids attract great attentions for applications in the biomedical field due to the combination of their mechanical and morphological properties. The mechanical behaviour of two classes of periodic cellular structures has been investigated: the first one is a strut-based structure; the second is a triply periodic minimal surfaces (TPMS) structure. Such structures derived from the body centered cubic (BCC) unit cell and were the G7 strut-based and the IWP sheet-based TPMS structure. The study was aimed at the mechanical and morphological characterization of the above cited cells for their application in biomedical devices. By means of the additive manufacturing Electron Beam Melting (EBM) technology, the G7 microlattice structures have been produced in titanium alloy. Compression tests have been carried out on three different levels of relative density, selected to evaluate the effect of this parameter on the mechanical properties. The correlation between relative density and mechanical properties of the G7 structure was defined by the Gibson-Ashby model. SEM analyses have been performed before the experimental tests in order to detect the morphological features and the matching between designed and real parameters, and after the tests to evaluate the failure mechanism of the structures. Abstract 3D periodic cellular solids attract great attentions for applications in the biomedical field due to the combination of their mechanical and morphological properties. The mechanical behaviour of two classes of periodic cellular structures has been investigated: the first one is a strut-based structure; the s cond is a triply periodic minimal surfaces (TPMS) structure. Such structures derived from the ody centered cubi (BCC) unit cell and were the G7 strut-based and the IWP sheet-based TPMS structure. study was aimed at the me hanical and morphological characterizatio of the bove cited cells for their application in biomedical devices. By means of the additive manufacturing Electron Beam Melting (EBM) technology, th G7 microlattice structures have b en produced in titanium alloy. Compression tests have been carried out on three different levels of relative density, sel cted to evaluate the effect of this par meter on the mechanical properties. The correlation b tween relative density and mechanic l properties of the G7 structure was defin d by the Gibson-Ashby model. SEM analyses have been performed before the experimental tests in ord r to det ct the morphological features and the matching between designed and real parameters, and after the tests to evaluate th failure mechanism of the structures. * Corresponding author. E-mail address: fdistefano1@unime.it * Corresponding author. E-mail address: fdistefano1@unime.it 2nd Mediterranean Conference on Fracture and Structural Integrity Mechanical and morphological characterization of BCC - derived unit cells for biomedical devices Fabio Distefano a *, Eugenio Guglielmino a , Rosalia Mineo b,c , Gabriella Epasto a 2nd Mediterranean Conference on Fracture and Structural Integrity Mechanical and morphol gical cha ct rization of BCC - derived unit cells for biomedical devices Fabio Distefano a *, Eugenio Guglielmino a , Rosalia Mineo b,c , Gabriella Epasto a a Department of Engineering, University of Messina, Contrada di Dio, Vill. Sant’Agata, 98166 Messina, Italy. b Mt Ortho srl, via fossa lupo sn, Aci Sant’Antonio, 95025 Catania, Italy. c Department of Civil Engineering and Architecture, University of Catania, Via S. Sofia 64, 95125 Catania, Italy a Department of Engineering, University of Messina, Contrada di Dio, Vill. Sant’Agata, 98166 Messina, Italy. b Mt Ortho srl, via fossa lupo sn, Aci Sant’Antonio, 95025 Catania, Italy. c Department of Civil Engineering and Architecture, University of Catania, Via S. Sofia 64, 95125 Catania, Italy