W S Enns-Bray, H Bahaloo, I Fleps, O Ariza, S Gilchrist, R Widmer, P Guy, H Pálsson, S J Ferguson, P A Cripton, B Helgason
Sideways falls are largely responsible for the highly prevalent osteoporotic hip fractures in today's society. These injuries are dynamic events, therefore dynamic FE models validated with dynamic ex vivo experiments provide a more realistic simulation than simple quasi-static analysis. Drop tower experiments using cadaveric specimens were used to identify the material mapping strategy that provided the most realistic mechanical response under impact loading. The present study tested the addition of compression-tension asymmetry, tensile bone damage, and cortical-specific strain rate dependency to the material mapping strategy of fifteen dynamic FE models of the proximal femur, and found improved correlations and reduced error for whole bone stiffness (R2 = 0...
February 2018: Journal of the Mechanical Behavior of Biomedical Materials