Abstract
High quality mesh is the basis of bone mechanics research and the precondition to ensure the accuracy of FEA (Finite Element Analysis) calculation. In order to obtain high accuracy and low distortion mesh of bone, the CFD (Computational Fluid Dynamics) meshing method is applied in this paper. The main process of bone finite element model construction consists of three parts, including CT (Computed Tomography) imaging, three-dimensional reverse modeling and meshing. By mesh optimization and boundary conditions imposition, the stress distribution of the occipital-atlantoaxial complex model and the relative motion angle between the Occipital Atlas and Atlantoaxial are obtained. According to the rotation angle checks, it is known that all the simulation results are within the range of cadaveric test data. The mesh generation technology provides a good idea and method for the study of bone mechanics.
Highlights
With the application and development of finite element method, meshing technology has become one of the criteria to measure the level of bone mechanics research [1]
The results show that the quality of mesh elements will directly determine the results of finite element calculation [2]
Researchers in various countries have successively adopted a variety of mesh generation methods, including tetrahedral mesh automatic generation method and hexahedron mapping mesh generation method [3]
Summary
With the application and development of finite element method, meshing technology has become one of the criteria to measure the level of bone mechanics research [1]. The quality of mesh may lead to the deviation of stress calculation results to 7 %-80 %. Low-quality meshes may even lead to the failure of finite element calculation. The mesh generation takes a long time, even on the deformed surface with complex curvature changes. Because the contact problem is a non-linear problem and the stress gradient on the surface of cortical bone is large, the cortical bone needs to adopt a high precision mesh. It takes a lot of time to divide the high-quality hexahedron elements, even on the deformed surface with complex curvature changes. This paper proposes the application of CFD meshing technology in artificial bone
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