Micromechanical modeling of ductile fracture of human humerus

Jamila Rahmoun (1) , Hakim Naceur (1) , Pascal Drazetic (1) , Christian Fontaine (2)

1 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201
2 Faculté de Médecine Henri Warembourg - Université de Lille

This paper deals with the formulation, development and validation of a newly developed micromechanical-based model for the modeling of the nonlinear ductile fracture of human humerus. The originality of the present works concerns the coupling between the micromechanical formulation based on the Mori-Tanaka homogenization scheme for cylindrical voids and the Marigo nonlinear ductile damage model based on the porosity growth. The proposed model was implemented as a User Material UMAT within the explicit dynamic software LS-DYNA and validated by numerical and experimental analysis conducted by a drop tower impact of human humerus. The outcome of the proposed multi-scale model appears to correctly predict the general trends observed experimentally via the good estimation of the ultimate impact load and the fracture patterns of the human humerus.

Mots clés: "Micromechanics"; "biomechanics"; "multiscale modeling"; "fracture; impact"; "finite element"

Domaines: Mécanique [physics.med-ph]

Jamila Rahmoun, Hakim Naceur, Pascal Drazetic, Christian Fontaine. Micromechanical modeling of ductile fracture of human humerus. Journal of Mechanical Engineering and Sciences, 2020, 14 (2), pp.6952-6960. ⟨10.15282/jmes.14.2.2020.32.0544⟩. ⟨hal-03442148⟩