Geometrical and material parameters to assess the macroscopic mechanical behaviour of fresh cranial bone samples
Résumé
The present study aims at providing quantitative data for the personalisation of geometrical and 21 mechanical characteristics of the adult cranial bone to be applied to head FE models. A set of 351 22 cranial bone samples, harvested from 21 human skulls, were submitted to three-point bending tests 23 at 10 mm/min. For each of them, an apparent elastic modulus was calculated using the beam's 24 theory and a density-dependant beam inertia. Thicknesses, apparent densities and percentage of ash 25 weight were also measured. Distributions of characteristics among the different skull bones show 26 their symmetry and their significant differences between skull areas. A data analysis was 27 performed to analyse potential relationship between thicknesses, densities and the apparent elastic 28 modulus. A specific regression was pointed out to estimate apparent elastic modulus from the 29 product of thickness by apparent density. These results offer quantitative tools in view of 30 personalising head FE models and thus improve definition of local injury criteria for this body part.