Original scientific paper

Numerical modelling of damage accumulation in cortical bone tissue

Martina Lovrenić-Jugović ; University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Institute of Applied Mechanics, Laboratory of Numerical Mechanics, Ivana Lučića 5, 10000 Zagreb, Croatia
Zdenko Tonković ; University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Institute of Applied Mechanics, Laboratory of Numerical Mechanics, Ivana Lučića 5, 10000 Zagreb, Croatia
Ivica Skozrit ; University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Institute of Applied Mechanics, Laboratory of Numerical Mechanics, Ivana Lučića 5, 10000 Zagreb, Croatia

Abstract

This paper describes the numerical implementation and validation of a constitutive model for simulating the mechanical behaviour of human cortical bone tissue. The model incorporates linear viscoelasticity coupled with damage to predict the creep and creep-recovery responses, respectively. The material parameters are determined by fitting the experimental results reported in the published literature. A computational algorithm for the integration of the proposed constitutive model at the material point level is derived. The derived algorithm in conjunction with the tangent stiffness matrix is implemented in the finite element code ABAQUS. The model predictions are found to be in good agreement with the experimental data presented in literature.

Keywords

cortical bone; creep; damage; finite element modelling; recovery; viscoelasticity

Hrčak ID:

79162

URI

https://hrcak.srce.hr/79162

Publication date:

29.3.2012.

Article data in other languages: croatian

Visits: 2.081 *