This paper presents an original numerical human head FE model followed by a validation against human cadaver head impact tests from the literature. The human head FE model developed has two particular features: one at the brain-skull interface level where fluid-structure interaction is taken into account, the other at the skull modelling level, by integrating the bone fracture simulation. Validation shows that the model correlates well with a number of experimental cadaver tests, including skull deformation and fracture, intra-cranial pressure and brain deformation. This state of the ait numerical human head surrogate has then been used to simulate real world accidents numerically . Helmet damage from thirteen motorcycle accidents was replicated in drop tests in order to define the head's loading conditions. A total of twenty two well documented American football head traumas have been reconstructed, as well as twenty eight pedestrian head impacts and six Formula I head traumata. By correlating head injury type and location with intra-cerebral mechanical field parameters computed from the model, it was possible to derive improved model-based head injury criteria and injury risk curves for different injury mechanisms i.e. for skull fracture, subdural haematoma and neurological injury. Illustration of how this new head injury prediction tool can contribute to injury investigation and to head protection system optimisation is also provided.
Model based head injury criteria application to head injury prediction
Anwendung modellbasierter Kopfverletzungskriterien bei der Vorhersage von Kopfverletzungen
EVU Jahrestagung, 18, ITAI Konferenz, 9 ; 135-150
2009
16 Seiten, 10 Bilder, 6 Tabellen, 38 Quellen
Aufsatz (Konferenz)
Englisch
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