Validation of linear and materially nonlinear μFE predicted displacement fields of bone biopsies using DVC: 27th Congress of the European Society of Biomechanics, 26.-29.06.2022, Porto, Portugal

Micro-finite element (μFE) models are able to predict
the mechanical behaviour of bone at the tissue level.
Their validation on the macro-scale has already been
achieved by comparing predicted apparent mechanical
properties with experimental measurements. Recently,
Digital Volume Correlation (DVC) enabled the
validation of μFE models at the meso-scale in the elastic
regime [1], but a validation of models including material
nonlinearities has not been conducted yet. The goal of
this study was to validate the highly efficient μFE solver
ParOSol [2] at the meso-scale (~ 1mm) using DVC
displacements measured in human trabecular bone
specimens tested up to failure. The study compares the
predicted displacement fields of different linear and
materially nonlinear [2] μFE simulation methods.