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Les traumatismes virtuels du foie : apport des essais expérimentaux en sollicitation dynamique et de la modélisation numérique

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Abstract

Virtual traumas of the liver: benefits of dynamical experimental tests and numerical modelling From clinical knowledge, it was established that hepatic traumas are one of the most frequently fatal injuries. Largely studied in the literature, the injury mechanisms were described from clinical observations and on logical deductions from physical interpretation. However, these physiopatholo gical data had not been validated by specific biomechanical work. To identify the mechanical behaviour of human trunk in frontal impact situation, experimental tests were performed on cadavers. The subject were instrumented with specific accelerometer sensors located on the significant parts and the attach system of the hepatic parenchyma. To complete this approach, numerical simulation was used. It concerned an accurate D reconstruction of the organs, an anthropometric study to take into account human variability in morphology up to the numerical simulation with finite element method. With this model, validated using experimental results, it is now possible to observe virtual traumas in large impact configurations.

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... These hypotheses require further laboratory study to define the role of each movement and each anatomical structure in terms of shock resistance [10][11][12][13]. Such a study could use a numerical 3D model in which the biomechanical properties of each organ are determined by experimental tests [27][28][29][30]. This would be of major interest because it allows for wide-scale tests as they are free from the problems inherent in studies using post-mortem human surrogates. ...
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