The probability of traumatic brain injuries based on tissue-level reliability analysis

• Autorzy: Hazay Máté , Bojtár Imre

Identyfikatory

DOI

10.5277/ABB-01281-2018-02

• Języki publikacji: EN

Abstrakty

EN

Motor vehicle crashes are one of the leading causes of traumatic brain injuries. Restraint systems of cars are evaluated by crash tests based on human tolerance data, however, the reliability of data currently used has been questioned several times in the literature due to the neglect of certain types of effects, injury types and uncertainties. Our main goal was to re-evaluate the currently applied risk curve by taking the previously neglected effects into account. Methods: In this paper, the probability of traumatic brain injury was determined by reliability analysis where different types of uncertainties are taken into account. The tissue-level response of the human brain in the case of frontal crashes was calculated by finite element analyses and the injury probability is determined by Monte Carlo simulations. Sensitivity analysis was also performed to identify which effects have considerable contribution to the injury risk. Results: Our results indicate a significantly larger injury risk than it is predicted by current safety standards. Accordingly, a new risk curve was constructed which follows a lognormal distribution with the following parameters: μLN = 6.5445 and LN = 1.1993. Sensitivity analysis confirmed that this difference primarily can be attributed to the rotational effects and tissue-level uncertainties. Conclusions: Results of the tissue-level reliability analysis enhance the belief that rotational effects are the primary cause of brain injuries. Accordingly, the use of a solely translational acceleration based injury metric contains several uncertainties which can lead to relatively high injury probabilities even if relatively small translational effects occur.

Słowa kluczowe

EN

traumatic brain injuries; finite element simulations; reliability analysis; Head Injury Criterion; injury risk curves

PL

analiza niezawodności; kryterium urazu głowy; HIC; ryzyko obrażeń

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2019
• Tom: Vol. 21, no. 1
• Strony: 141--152
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr.

Twórcy

autor

Hazay Máté

• Department of Structural Mechanics, Budapest University of Technology and Economics, Budapest, Hungary

autor

Bojtár Imre

• Department of Structural Mechanics, Budapest University of Technology and Economics, Budapest, Hungary

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).