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Finite Element Analysis of Energy-Absorbing Floors for Reducing Head Injury Risk during Fall Accidents
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Neuronic Engineering.ORCID iD: 0000-0003-1104-2751
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Neuronic Engineering.ORCID iD: 0000-0003-0125-0784
2023 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 13, no 24, article id 13260Article in journal (Refereed) Published
Abstract [en]

Featured Application: The results proposed a new approach to evaluate the protection effectiveness of energy-absorbing floors for fall-related injury prevention. Also, it could help to reduce the huge associated costs related to fall-related injuries among the children and elderly population. Energy-absorbing floor (EAF) has been proposed as one of several biomechanically effective strategies to mitigate the risk of fall-related injuries by decreasing peak loads and enhancing system energy absorption. This study aims to compare the protective capacity of four commercially available EAF products (Igelkott Floor, Kradal, SmartCells, and OmniSports) in terms of head impacts using the finite element (FE) method. The stress–strain curves acquired from mechanical tests were applied to material models in LS-Dyna. The established FE models were then validated using Hybrid III or hemispheric drop tests to compare the acceleration–time curves between experiments and simulations. Finally, the validated FE models were utilized to simulate a typical pedestrian fall accident scenario. It was demonstrated that EAFs can substantially reduce the peak forces, acceleration, and velocity changes during fall-related head impacts. Specifically, in the accident reconstruction scenario, SmartCells provided the largest reduction in peak linear acceleration and skull fracture risk, while Igelkott Floor provided the largest reduction in peak angular velocity and concussion risk. This performance was caused by different energy absorption mechanisms. Consequently, the results can contribute to supporting the implementation of EAFs and determine the effectiveness of various protective strategies for fall-related head injury prevention.

Place, publisher, year, edition, pages
Multidisciplinary Digital Publishing Institute (MDPI) , 2023. Vol. 13, no 24, article id 13260
Keywords [en]
energy-absorbing floor (EAF), fall accident, finite element (FE) method, head impact, injury prevention
National Category
Other Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-346496DOI: 10.3390/app132413260ISI: 001130897400001Scopus ID: 2-s2.0-85192454158OAI: oai:DiVA.org:kth-346496DiVA, id: diva2:1858412
Note

QC 20240517

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-17Bibliographically approved

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Huang, QiKleiven, Svein

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