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Contribution au développement d'un outil de simulation prédictif des lésions cranio-encéphaliques par reconstruction d'accidents de la circulation

Abstract : In traffic accidents, head injuries are considered to be frequent and serious. Because of the various kind of injuries (bone, vascular and neurology) and limitations of the biomechanical representation of the head, old and simple protection criteria (such as the HIC or the peak linear acceleration of the head ) are still used in standard tests. Contrary to the others body segments, it’s not possible to use a direct approach (consisting in impacting biological human body models) to determine the tolerance and the threshold. In order to better represent the physical phenomena, an original research methodology that is based on traffic accidents reconstruction is developed.The first batch of works deals with the definition of a new finite element model of the head. The features concern the cerebro-spinal fluid described by an hyperelastic material defined by a sliding without separation interface with the brain in order to represent its relative movement with respect to the skull. The confrontations with experimental tests made on cadaver’s head confirm the model prediction. An accident reconstruction methodology has been developed. It is based on kinematics reconstruction, experimental reconstruction of the vehicle’s collision, multibody simulation of the second collision and study of the internal head response with the head model. This reconstruction approach is then validated on a real automotive accident. Furthermore, the development of a generic model applied to motorcycle accidents is also analysed. From the results of the automotive accident reconstruction, the intercerebral contusion observed has been bridged to a particular time duration of a certain level of von Mises stresses.
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Submitted on : Wednesday, November 10, 2021 - 12:14:06 PM
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  • HAL Id : tel-03424098, version 1

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Bertrand Canaple. Contribution au développement d'un outil de simulation prédictif des lésions cranio-encéphaliques par reconstruction d'accidents de la circulation. Mécanique [physics.med-ph]. Université de Valenciennes et du Hainaut-Cambrésis, 2001. Français. ⟨NNT : 2001VALE0002⟩. ⟨tel-03424098⟩

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