Author(s):
Olmos, Andrea Alexandra Rodrigues ; Fertuzinhos, Aureliano Costa ; Dias, Maria Isabel Ribeiro ; Pereira, Fábio André Magalhães ; Ferreira de Moura, Marcelo Francisco de Sousa ; Zille, Andrea ; Dourado, N.
Date: 2021
Persistent ID: https://hdl.handle.net/1822/70429
Origin: RepositóriUM - Universidade do Minho
Subject(s): Cortical bone; Bone fracture; Osteosynthesis plate; Mechanical tests; Finite element analysis; bone fracture; osteosynthesis plate; mechanical tests; finite element analysis
Description
This work describes the numerical modelling of an immobilization system currently used to repair long bone fractures. The referred system was employed to ensure the mechanical stabilization of an oblique bone fracture by means of a dynamic compression plate (DCP) and bicortical screws. The numerical characterization of the fixation system was performed to obtain stress and strain fields in cortical bone tissue. The validation of the numerical model was performed using experimental data previously obtained in other work. Since the experimental characterization indorsed the visualization of the screw pull-out phenomenon during the loading process, damage parameters (trapezoidal law) were measured experimentally in this region. These parameters were introduced in the finite element model (FEM) to simulate the initiation and propagation of damage in bone tissue. A mixed-mode (I+II) damage law was used to mimic the mechanical behaviour of the bone fracture and the screw-bone interface.
