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Theses

Modélisation par éléments finis de la face humaine en vue de la simulation de sa réponse au choc

Abstract : Facial injuries produced by road accidents, sports activities, do not generally lead to fatal consequences, nevertheless, they require expensive medi-cal care and can leave anaesthetic results. Furthermore, the face protects the brain, whose injuries depend on facial bone response.
In order to predict injury risks to the face and brain, the aim of this study is to develop a finite element model of the facial and cranial bone structure and to validate its response to impact.
The first part of this work consists in building the finite element mesh of the facial and cranial bones using CT scans. Shell elements, with varied thickness and density, have been chosen.
The hypothesis of isotropic and homogeneous behaviour has been made for material properties of facial and cranial bones. Static bending tests performed on cranial bone samples and simulated using the finite ele-ment method gave the elasto-plastic properties of this material. Results correspond to the values found in literature.
Mechanical response of the whole facial model has been validated under static loading. To achieve validation, compression tests were performed on the facial part of an isolated head. Numerical and experimental force deflexion curves were compared in order to identify mechanical prop-erties of this sample. Then, local measurements of displacement, obtained using numerical correlation, enabled validation of the local behaviour of the finite element model.
After static validation, the finite element model was assessed un-der impact loading. The model's behaviour corresponds well to the experimental response of the head tested.
Many exploitation perspectives are considered for this numerical model of the facial and cranial bones in the field of impact purpose or max-illofacial surgery. In particular, it will help for the definition of head injury criterion for impact.
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Theses
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https://tel.archives-ouvertes.fr/tel-00008231
Contributor : Barbara Autuori <>
Submitted on : Monday, January 24, 2005 - 11:06:08 AM
Last modification on : Wednesday, July 8, 2020 - 12:43:54 PM
Long-term archiving on: : Friday, April 2, 2010 - 9:34:18 PM

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  • HAL Id : tel-00008231, version 1

Citation

Barbara Autuori. Modélisation par éléments finis de la face humaine en vue de la simulation de sa réponse au choc. Sciences du Vivant [q-bio]. INSA de Lyon, 2004. Français. ⟨tel-00008231⟩

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