A new software tool (VA-BATTS) to calculate bending, axial, torsional and transverse shear stresses within bone cross sections having inhomogeneous material properties

作者：Kourtis Lampros C^*; Carter Dennis R; Kesari Haneesh; Beaupre Gary S

来源：Computer Methods in Biomechanics and Biomedical Engineering, 2008, 11(5): 463-476.

DOI：10.1080/10255840801930728

• bone stress calculation
• inhomogeneous material properties
• transverse shear
• torsional shear
• finite element analysis
• bone mechanical properties

Introduction: This study introduces, validates and demonstrates a new automated software tool (VA-BATTS) to calculate bone stresses within a bone cross section subjected to bending, axial, torsional and transverse shear far-field loading conditions, using quantitative computed tomography (QCT) data.
Methods: A QCT image is imported and processed to generate a 2D finite element (FE) mesh of the bone with inhomogeneous (CT-based) transversely isotropic material properties. Bending and axial stresses are determined using inhomogeneous beam theory; torsional and transverse shear stresses are calculated using a new 2D FE formulation.
Results: Validation studies show excellent agreement between results obtained using VA-BATTS and results obtained using analytical 2D models and inhomogeneous 3D FE models.
Discussion: Out-of-plane bone stresses can be accurately calculated using a 2D analysis. Material inhomogeneity can have a marked effect on predicted stresses. In three-point bending experiments, transverse shear may present important contributions to the failure potential.
The software is available at https://simtk.org/home/va-batts.

• 出版日期2008