prediction of proximal femur fracture : finite element modeling based on mechanical damage and experimental validation
type: Dataset
description: Femoral fractures caused by the osteoporosis become major problem of public health, and therefore, this subject becomes an increasingly important goal for both clinicians and biomedical researchers. The purpose of this study is to develop a new coupled approach to predict the fracture of neck femoral. The current study proposes a validated 2D and 3D finite element (FE) models based on continuum damage mechanics in order to simulate human proximal femur fracture considering the progressive cracks initiation and propagation. These models are applied and validated under single limb stance and sideways fall configuration. Quasi brittle behavior laws coupled to damage are implemented in FORTRAN and fed into ABAQUS/Standard codes to describe the constitutive behavior (subroutine UMAT). Bone mineral density (BMD) is measured using dual energy X-ray absorptiometry (DXA) for the region of interest. The models have been developed within two variants (one isotropic, the other anisotropic) and validated with experimental results of tests performed on human femur samples under single limb stance configuration. During these tests, optical measurements based on the method of digital image correlation (DIC) were conducted to acquire the various fields of displacement and deformation. To calculate the fracture risk of the femoral head, it is necessary to assign correctly the bone material properties. The 3D FE models were able to predict the overall force-displacement curve, location and initiation of femur fractures. Moreover, despite its robustness, this 3D FE model is still limited to be used, within clinically acceptable time, for diagnostic purposes. To overcome this, the model was simplified into 2D model which has been preliminarily validated under identical boundary conditions and the results showed a good correlation with experiments. These studies have highlighted the potential of the finite element model based on quasi-brittle damage to become a complementary tool for pre…
identifier: NNT: 2013ORLE2045
issued: 2026-05-05T10:34:06.931824
language: en
modified: 2026-05-05T10:34:06.931828
contact point: Organization
  fn: CCSD
keyword: damage
keyword: elements-finis
keyword: endommagement
keyword: experiment
keyword: experimentation
keyword: femur
keyword: finite-element
keyword: fracture
keyword: infoeu-reposemanticsdoctoralthesis
keyword: spiotherengineering-sciences-physicsother
keyword: theses
keyword: validation
landing page: https://theses.hal.science/tel-00994604

prediction of proximal femur fracture : finite element modeling based on mechanical damage and experimental validation
type: Distribution
format: HTML
issued: 2026-05-05T10:34:06.938987
modified: 2026-05-05T10:34:06.914656
access URL: https://theses.hal.science/tel-00994604

test_moissonnage_selune
type: Agent