PSI - Issue 79

Alessandra Ceci et al. / Procedia Structural Integrity 79 (2026) 73–80

80

Energy absorption capability. The specific energy absorption at 60% strain reached 3.93 J/cm³ for Structure 1 and 30.87 J/cm³ for Structure 2, highlighting how a minimal geometric variation of the base cell can lead to profoundly different mechanical responses. Energy dissipation mechanisms. Beyond the absolute SEA values, the two structures absorbed energy in fundamentally different ways: Structure 1 dissipated energy progressively through sequential strut collapse (distributed absorption), while Structure 2 concentrated energy absorption mainly in the densification stage (localized absorption). These results underline the suitability of such parametric lattice structures for energy management in lightweight systems. The progressive and distributed absorption of Structure 1 makes it promising for applications requiring controlled load mitigation over large deformations, such as protective packaging for sensitive components, biomedical implants, and vibration damping systems. Conversely, the higher strength and localized energy dissipation of Structure 2 suggest potential use in crashworthiness components, impact protection devices, and structural reinforcements, where rapid stiffening under load is beneficial. Overall, these results demonstrate the potential of parametric design combined with the Lost-PLA process for the development of lightweight metallic absorbers, with promising applications in crashworthiness, passive protection, and energy dissipation systems. References Ashby, M.F., Evans, A., Fleck, N.A., Gibson, L.J., Hutchinson, J.W., Wadley, H.N.G., 2000. Metal Foams A Design Guide. Butterworth Heinemann, Burlington, MA. Bari, K., Bollenbach, L., 2022. Spiderweb Cellular Structures Manufactured via Additive Layer Manufacturing for Aerospace Application. J. Compos. Sci. 6, 133. https://doi.org/10.3390/jcs6050133 Bieler, S., Weinberg, K., 2024a. Energy absorption of sustainable lattice structures under impact loading. https://doi.org/10.48550/arXiv.2412.06547 Bieler, S., Weinberg, K., 2024b. Energy absorption of sustainable lattice structures under static compression. https://doi.org/10.48550/arXiv.2412.06493 Catar, L., Tabiai, I., St-Onge, D., 2024. Polymer Micro-Lattice buffer structure Free Impact absorption. https://doi.org/10.48550/arXiv.2408.02909 Ceci, A., Cerini, C., Costanza, G., Tata, M.E., 2025a. Production of Al Alloys with Kelvin Cells Using the Lost-PLA Technique and Their Mechanical Characterization via Compression Tests. Materials 18, 296. https://doi.org/10.3390/ma18020296 Ceci, A., Costanza, G., Giudice, F., Sili, A., Tata, M.E., 2025b. The Role of Metal Foams for Sustainability and Energy Transition. Alloys 4, 16. https://doi.org/10.3390/alloys4030016 Ceci, A., Costanza, G., Savi, G., Tata, M.E., 2024. Optimization of the lost PLA production process for the manufacturing of Al-alloy porous structures: Recent developments, macrostructural and microstructural analysis. Int. J. Lightweight Mater. Manuf. 7, 662–667. https://doi.org/10.1016/j.ijlmm.2024.05.007 Farshbaf, S., Dialami, N., Cervera, M., 2025. Large deformation and collapse analysis of re-entrant auxetic and hexagonal honeycomb lattice structures subjected to tension and compression. https://doi.org/10.48550/arXiv.2503.18736 He, J., Kushwaha, S., Abueidda, D., Jasiuk, I., 2022. LatticeOPT: A heuristic topology optimization framework for thin-walled, 2D extruded lattices. Struct. Multidiscip. Optim. 65, 308. https://doi.org/10.1007/s00158-022-03397-5 Maskery, I., Aremu, A.O., Simonelli, M., Tuck, C., Wildman, R.D., Ashcroft, I.A., Hague, R.J.M., 2015. Mechanical Properties of Ti-6Al-4V Selectively Laser Melted Parts with Body-Centred-Cubic Lattices of Varying cell size. Exp. Mech. 55, 1261–1272. https://doi.org/10.1007/s11340-015-0021-5 Pehlivan, F., Karamanl  , İ .A., Temiz, A., Öztürk, F.H., Karaca, M.M., 2025. Hierarchical cellular structures based on TPMS mimicking cancellous bone. J. Mech. Behav. Biomed. Mater. 168, 107037. https://doi.org/10.1016/j.jmbbm.2025.107037 Sadeghi, H., Bhate, D., Abraham, J., Magallanes, J., 2018. Quasi-static and dynamic behavior of additively manufactured metallic lattice cylinders. Presented at the SHOCK COMPRESSION OF CONDENSED MATTER - 2017: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, St. Louis, MO, USA, p. 070029. https://doi.org/10.1063/1.5044838 Sequino, L., Capasso, C., Costanza, G., Tata, M.E., 2023. Experimental Investigation on Thermal Effects of a Metal Foam-based Frame Application for Lithium-Ion Cells. Presented at the 16th International Conference on Engines & Vehicles, Capri, Italy, pp. 2023-24–0168. https://doi.org/10.4271/2023-24-0168 Shahriyari, E., Khiavi, S.G., Divandari, M., Ali Boutorabi, S.M., 2025. Effect of unit cell topologies on mechanical properties of cylindrical lattice structures fabricated by indirect additive manufacturing. J. Mater. Res. Technol. 36, 2785–2798. https://doi.org/10.1016/j.jmrt.2025.03.289 Tancogne-Dejean, T., Spierings, A.B., Mohr, D., 2016. Additively-manufactured metallic micro-lattice materials for high specific energy absorption under static and dynamic loading. Acta Mater. 116, 14–28. https://doi.org/10.1016/j.actamat.2016.05.054 Yan, C., Hao, L., Hussein, A., Raymont, D., 2012. Evaluations of cellular lattice structures manufactured using selective laser melting. Int. J. Mach. Tools Manuf. 62, 32–38. https://doi.org/10.1016/j.ijmachtools.2012.06.002