Quasi-static and dynamic behaviour of the bone structures with fine geometric and materials modelling aspects

O Mayeur,R Delille,E Markiewicz,G Haugou,F Chaâri,P Drazetic

doi:10.1051/epjconf/20122603008

Abstract

The principle aim of this study is to highlight the influence of velocity on mechanical responses of cortical bones. Quasi-static tests are performed on cubic samples from bovine femurs in order to highlight the anisotropic effect of cortical structure. Thanks to the Hopkinson bars technique, a set of curves will be obtained and analysed to define precisely mechanical behaviour of porosity and loading directions. Therefore, this technique combined with a precise geometrical measurement based on μCT technique is expected to provide a more accurate representation of the mechanical behaviour of biological tissues. This protocol will be applied on human tissues after validation of geometrical and material correlation in order to increase the biofidelity of human body models.

Highlights

The decrease of injuries in road accidents is a challenging task and the improvement in this science requires more and more numerical tools for future evaluations of new generation of cars
The 40 samples used in quasi-static tests are analysed to illustrate the porosity and anisotropic effects on the first bovine femur
Quasi-static tests are focused on the mechanical behaviour of the cortical bone regarding the loading directions and porosity effect

Summary

Introduction

The decrease of injuries in road accidents is a challenging task and the improvement in this science requires more and more numerical tools for future evaluations of new generation of cars. Labman (Lizee [1]), Thums (Iwamoto [2]), Humos (Behr [3]), were published as incomes of European consortiums or as car manufacturer initiatives These models are constrained by simplification needed for global testing and are limited in their biofidelity. In this context, the knowledge in biomechanics needs to be increased partly thanks to more accurate studies in mechanical behaviour of the skeleton. Different mechanical tests on cortical bone are performed during the past decades. This characterisation on biological material is a relevant task due to the anisotropies, heterogeneities and nonlinearities. The main interest of this study is to combine the mechanical test to the generation of accurate geometrical measurement

Objectives

Methods

Results

Conclusion