Composite FE human skull model validation and development of skull fracture criteria

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Sahoo, Debasis¹; Deck, Caroline¹; Yoganandan, Narayan²; Willinger, Rémy¹

Composite FE human skull model validation and development of skull fracture criteria

Proceedings of the 2014 International IRCOBI Conference on the Biomechanics of Injury

Affiliations

¹Icube, University of Strasbourg, France

²Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, USA
Abstract and keywords

An existing finite element head model is enhanced in terms of composite modeling and new constitutive law for the skull. The advanced FE head model is validated against the entire time domain response obtained from 15 side impact experiments conducted with postmortem human surrogates. The new skull model is capable of reproducing skull fracture in a realistic way. Further, 70 well‐documented head trauma cases are reconstructed. The 15 experimental cases plus the 70 real‐world head trauma cases are finally put together to derive a skull fracture injury risk curve. Based on the statistical analysis of different mechanical parameters, the skull internal energy was the best candidate parameter to predict the skull failure. The proposed tolerance limit for 50% risk of skull fracture is 448mJ of skull internal energy.

Keywords: Finite element head modeling, skull fracture criteria, statistical analysis
Links

URL: http://www.ircobi.org/downloads/irc14/pdf_files/20.pdf

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Cited By (1)

Year	Entry
2015	Sahoo D, Deck C, Willinger R. Axonal strain as brain injury predictor based on real‐world head trauma simulations. In: Proceedings of the 2015 International IRCOBI Conference on the Biomechanics of Injury. September 9-11, 2015; Lyon, France.186-197.