Helmets with lattice liners can mitigate traumatic brain injury from impacts.

Autor: Nasim M; Department of Industrial Engineering, University of Padova, Padova, Italy; Department of Mechanical and Production Engineering, Islamic University of Technology, Gazipur, Bangladesh. Electronic address: mnasim@iut-dhaka.edu., Spadoni S; Department of Industrial Engineering, University of Padova, Padova, Italy. Electronic address: silvia.spadoni@unipd.it., Pavan PG; Department of Industrial Engineering, University of Padova, Padova, Italy; Fondazione Istituto di Ricerca Pediatrica Città della Speranza (IRP), Padova, Italy. Electronic address: piero.pavan@unipd.it., Brasco V; Department of Industrial Engineering, University of Padova, Padova, Italy. Electronic address: veronica.brasco@gmail.com., Galvanetto U; Department of Industrial Engineering, University of Padova, Padova, Italy; Center of Studies and Activities for Space (CISAS) 'G. Colombo', Padova, Italy. Electronic address: ugo.galvanetto@unipd.it.
Jazyk: angličtina
Zdroj: Journal of biomechanics [J Biomech] 2024 Nov; Vol. 176, pp. 112362. Date of Electronic Publication: 2024 Oct 05.
DOI: 10.1016/j.jbiomech.2024.112362
Abstrakt: This study explores the effectiveness of architected lattice structures, specifically made of polyamide 12 (PA12) material, as potential helmet liners to mitigate traumatic brain injuries (TBI), with a focus on rotational acceleration. Evaluating three lattice unit cell topologies (simple cubic, dode-medium, and rhombic dodecahedron), the research builds upon prior investigations indicating that PA12 lattice liners may outperform conventional EPS liners. Employing a high-fidelity finite element male head model and utilizing direct and oblique impact scenarios, mechanical quantities, such as maximum principal strain (MPS) and shear strain, cumulative strain damage measure and intracranial pressure were measured at the tissue level in different brain regions. Results indicate that lattice liners, especially with dode-medium topology, exhibit promising reductions in brain tissue strains. On average, during oblique impacts, less than 1 % of the brain volume experienced an MPS level of 0.4 when the lattice liners were adopted, whereas that percentage was above 70 % with the expandable polystyrene (EPS) foam liners. Pressure-based assessments suggest that lattice liners may outperform EPS liners in oblique impacts, showcasing the limitations of EPS for effective TBI mitigation. Despite certain model limitations, this study emphasizes the need for advancements in helmet technology, particularly in the development of commercial lattice liners using additive manufacturing, to address the limitations of existing EPS liners in preventing rotational consequences of impacts and reducing TBI.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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