Stressed volume estimated by finite element analysis predicts the fatigue life of human cortical bone: The role of vascular canals as stress concentrators
نویسندگان
چکیده
The fatigue life of cortical bone can vary several orders magnitude, even in identical loading conditions. A portion this variability is likely related to intracortical microarchitecture and the role vascular canals as stress concentrators. size, spatial distribution, density determine peak magnitude volume concentrations. This study utilized a combination experimental testing image-based finite element (FE) analysis establish relationship between stressed (i.e., above yield stress) associated with bone. Thirty-six samples were prepared from human femora tibiae five donors. Samples allocated four groups, corresponding ranges 60, 70, 80, 90 MPa, then cyclically loaded zero-compression until fracture. Porosity, canal diameter, separation, number for each sample was quantified using X-ray microscopy (XRM) after testing. FE models created XRM images used calculate volume. Stressed good predictor life, accounting 67% scatter fatigue-life measurements. An increase most strongly higher levels porosity larger diameters. findings suggest that large variance driven by microarchitecture, failure may be predicted quantifying concentrations canals.
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ژورنال
عنوان ژورنال: Bone
سال: 2021
ISSN: ['8756-3282', '1873-2763']
DOI: https://doi.org/10.1016/j.bone.2020.115647