Liver injuries in frontal crash situations: A coupled numerical-experimental approach

Pj Arnoux (1) , T. Serre (1) , N. Cheynel , L. Thollon (1) , M. Behr (1) , P. Baque , C. Brunet (1)

1 LBA UMR T24 - Laboratoire de Biomécanique Appliquée

From clinical knowledge, it has been established that hepatic traumas frequently lead to lethal injuries. In frontal or lateral crash situations, these injuries can be induced by pure deceleration effects or blunt trauma due to belt or steering wheel impact. Concerning the liver under frontal decelerations, how could one investigate organ behaviour leading to the injury mechanisms? This work couples experimental organ decelerations measurements (with 19 tests on cadaver trunks) and finite element simulation, provides a first analysis of the liver behaviour within the abdomen. It shows the influence of the liver attachment system that leads to liver trauma and also torsion effects between the two lobes of the liver. Injury mechanisms were evaluated through the four phases of the liver kinematics under frontal impact: (1) postero-anterior translation, (2) compression and sagittal rotation, (3) rotation in the transverse plane and (4) relaxation. Foie ; modèle élements finis ; expérimentation ; décélération, choc frontal.

Mots clés: ESSAI DE CHOC (VEH); VISCERES; BLESSURE; COLLISION FRONTALE; MODELE NUMERIQUE

Domaines: Modélisation et simulation

Pj Arnoux, T. Serre, N. Cheynel, L. Thollon, M. Behr, et al.. Liver injuries in frontal crash situations: A coupled numerical-experimental approach. Computer Methods in Biomechanics and Biomedical Engineering, 2008, vol11,n2, p189-203. ⟨hal-00505952⟩