PSI - Issue 82

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000–000

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ScienceDirect

Procedia Structural Integrity 82 (2026) 107–111

© 2026 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 ICSID organizers Abstract The article deals with the stiffness investigation of a sample with porous structures, total sizes 40 x 40 x 50 mm, produced by the SLM (Selective Laser Melting) method. It is focused on experimentally tested samples made of AlSi10Mg alloy with the Neovius topology, which were produced with four different volume fractions, specifically 12.1 %; 18.7 %; 25.5 % and 40 %. Quasi-static compressive loading experiments were performed according to the international standard ASTM E9 at a crosshead speed of 1 mm/min using an Instron 8802 testing machine with a 250 kN servo-hydraulic motor. The results identified a linear dependence of axial compression stiffness on volume fraction and fractographic analysis revealed a mainly quasi-ductile failure mechanism, characterized by fine dimples and tear ridges on the fracture surfaces. © 2026 The Authors. Copy from the contract: 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 ICSID organizers Keywords: compression; Neovius structure, 3D printed aluminium alloy; stiffness; fracture surface 1. Introduction Metamaterials, including materials with regularly distributed porous structures, are currently a very intensively developing area of the technical industry. They bring a number of advantages compared to components produced in the classic way. The primary focus of such porous structures is to lighten the product and at the same time preserve 8th International Conference on Structural Integrity and Durability (ICSID2025) Effect of volume fraction on axial compression stiffness of the 3D printed porous sample under compression Katarina Monkova a, *, George Pantazopoulos b †, Peter Pavol Monka a , Anagnostis Toulfatzis b , Sofia Papadopoulou b , Marianthi Bouzouni b a Technical University of Kosice, Faculty of Manufacturing Technologies, Sturova 31, 080 01 Presov, Slovakia c ELKEME Hellenic Research Centre for Metals S.A., 61st km Athens – Lamia National Road, 32011 Oinofyta Viotias, Greece Abstract The article deals with the stiffness investigation of a sample with porous structures, total sizes 40 x 40 x 50 mm, produced by the SLM (Selective Laser Melting) method. It is focused on experimentally tested samples made of AlSi10Mg alloy with the Neovius topology, which were produced with four different volume fractions, specifically 12.1 %; 18.7 %; 25.5 % and 40 %. Quasi-static compressive loading experiments were performed according to the international standard ASTM E9 at a crosshead speed of 1 mm/min using an Instron 8802 testing machine with a 250 kN servo-hydraulic motor. The results identified a linear dependence of axial compression stiffness on volume fraction and fractographic analysis revealed a mainly quasi-ductile failure mechanism, characterized by fine dimples and tear ridges on the fracture surfaces. © 2026 The Authors. Copy from the contract: 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 ICSID organizers Keywords: compression; Neovius structure, 3D printed aluminium alloy; stiffness; fracture surface 1. Introduction Metamaterials, including materials with regularly distributed porous structures, are currently a very intensively developing area of the technical industry. They bring a number of advantages compared to components produced in the classic way. The primary focus of such porous structures is to lighten the product and at the same time preserve 8th International Conference on Structural Integrity and Durability (ICSID2025) Effect of volume fraction on axial compression stiffness of the 3D printed porous sample under compression Katarina Monkova a, *, George Pantazopoulos b †, Peter Pavol Monka a , Anagnostis Toulfatzis b , Sofia Papadopoulou b , Marianthi Bouzouni b a Technical University of Kosice, Faculty of Manufacturing Technologies, Sturova 31, 080 01 Presov, Slovakia c ELKEME Hellenic Research Centre for Metals S.A., 61st km Athens – Lamia National Road, 32011 Oinofyta Viotias, Greece

* Corresponding author. Tel.: +421-55-602-6370. E-mail address: katarina.monkova@tuke.sk * Corresponding author. Tel.: +30-2262-60-4463. E-mail address: gpantaz@elkeme.gr * Corresponding author. Tel.: +421-55-602-6370. E-mail address: katarina.monkova@tuke.sk * Corresponding author. Tel.: +30-2262-60-4463. E-mail address: gpantaz@elkeme.gr

2452-3216 © 2026 The Authors. Copy from the contract: 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 ICSID organizers 2452-3216 © 2026 The Authors. Copy from the contract: 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 ICSID organizers

2452-3216 © 2026 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 ICSID organizers 10.1016/j.prostr.2026.04.017