PSI - Issue 79

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 79 (2026) 348–353

© 2025 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 IGF28 - MedFract3 organizers Keywords: lattice structures; bio-inspired; energy efficency Three types of structures were considered: regular square, triangular and deep-sea glass sponge. This paper investigates the mechanical response of the three considered structures and the failure modes. The specific strength of the deep-sea inspired structure has the highest specific strength and energy efficency. 1. Introduction The lattice structures, produced by repeated unit cells in a specific pattern, offer a high strength-to-weight ratio, Khan and Riccio (2024). The biological structures inspired engineers on leveraging natural principles to innovate in materials science and engineering. In the last years, we can see an expansion of biological inspiration to enhance technology across various domains, including biomedical applications, robotics, and sustainable design. Typical examples are the manufactured cellular structures, like foams (Marsavina and Linul (2020)) and honeycomb structures Abstract In contrast to traditional man-made materials, the biological structures show superior mechanical properties including high strength and energy absorption capacity. The lattice structures were obtained by additive manufacturing using VAT photopolymerisation. 28th International Conference on Fracture and Structural Integrity - 3rd Mediterranean Conference on Fracture and Structural Integrity Bio-inspired structures for energy efficiency Petru Mihai Margitas a , Liviu Marsavina a, *, Cosmin Marsavina a , Davide D’Andrea b , Dario Santonocito b , Giacomo Risitano b a University Politehnica Timisoara, Department of Mechanics and Strength of Materials, 1 Mihai Viteazul Blvd., 300222, Timisoara, Romania b University of Messina, Department of Engineering, Contrada di Dio, 98166, Italy

* Corresponding author. Tel.: +40-726397635. E-mail address: liviu.marsavina@upt.ro

2452-3216 © 2025 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 IGF28 - MedFract3 organizers 10.1016/j.prostr.2025.12.344