title: Influence of head mass on temporo-parietal skull impact using finite element modeling.
abstract: The effect of head mass on its biomechanical response during lateral impact to the head is investigated in this computational study. The mass of the head of a state-of-the-art validated finite element head model is altered by ± 10 % from the base value of 4.7 kg. Numerical simulations of lateral head impacts for 30 cases (representing 15 human cadaver experiments × 2 mass configurations) are performed using the LS-DYNA solver at different velocities ranging from 2.4 to 6.5 m/s and three impacting conditions representing different stiffness and shapes of the contact/impact surfaces. Results are compared with the original model using the baseline head mass, thus resulting in a total of 45 simulations. Present findings show that the head mass has greater influence for peak interaction forces and the force has a greater dependency on stiffness of contact surface than the shape. Mass variations have also influence on skull strain energy. Regardless of increase/decrease in skull strain energy influenced by head mass variations used in the computational study, the 50 % fracture tolerance limit was unaltered, which was 544 mJ. The present study gives a better understanding of the mechanism of temporo-parietal skull impact.
authors: Université de Strasbourg ICube, UNISTRA-CNRS, 2 rue Boussingault, 67000, Strasbourg, France.
authors: Debasis
authors: D
authors: Sahoo
authors: Université de Strasbourg ICube, UNISTRA-CNRS, 2 rue Boussingault, 67000, Strasbourg, France. deck@unistra.fr.
authors: Caroline
authors: C
authors: Deck
authors: Department of Neurosurgery, Medical College of Wisconsin, 9200 West Wisconsin Avenue, Milwaukee, WI, 53226, USA.
authors: Narayan
authors: N
authors: Yoganandan
authors: Université de Strasbourg ICube, UNISTRA-CNRS, 2 rue Boussingault, 67000, Strasbourg, France.
authors: Rémy
authors: R
authors: Willinger
mesh_terms: D001696:Biomechanical Phenomena; D003198:Computer Simulation; D020342:Finite Element Analysis; D006257:Head; D006801:Humans; D008954:Models, Biological; D009929:Organ Size; D010296:Parietal Lobe / Q000502:physiology*; D012886:Skull / Q000502:physiology*; D013702:Temporal Lobe / Q000502:physiology*
keywords: Finite element model; Parametric study; Peak forces; Skull fracture; Temporo-parietal impact experiments