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Contribution à la compréhension du comportement de l'abdomen lors d'un chargement dynamique frontal par une ceinture de sécurité

Abstract : According to accident analysis, the abdomen has moved to the first body part to protect during a frontal car crash for 3-point belted occupants. In that case, abdominal injuries can be attributed to the submarining phenomena. Besides, a lap belt out of position (OOP) can also generate abdominal injuries during the belt pretensionning. These two phenomena imply a dynamic belt loading of the abdomen. Penetration rates are between 4 and 8 m/s. The purpose of that study is to bring a deeper insight on abdominal behavior and injury mechanisms in order to build an injury predictive model useful to develop and improve safety devices. In order to investigate abdominal response to dynamic belt loading, eight experimental tests were performed on eight Post Mortem Human Surrogates (PMHS). Four were tested in a submarining configuration and four in OOP. Belt and back forces, belt displacement, 3D external deformations of the abdomen, CT scans and pressures were recorded. Based both on previous studies and experimental results obtained, a lumped parameter model was developed. This model reproduces abdominal responses and highlights the non-linear, inertial and viscous comportment of the abdomen. Injury outcomes associated to measures provide validation methods of finite element models of the human abdomen and allow the global improvement of the HUMOS2 FE abdominal model
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Submitted on : Tuesday, December 7, 2010 - 9:26:04 AM
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  • HAL Id : tel-00543990, version 1

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S. Lamielle. Contribution à la compréhension du comportement de l'abdomen lors d'un chargement dynamique frontal par une ceinture de sécurité. Sciences du Vivant [q-bio]. Université Claude Bernard - Lyon I, 2008. Français. ⟨tel-00543990⟩

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