A 3d Fea Model of Nanoindentation Measurement of Cortical Bonewith Anisotropic Material Property
نویسنده
چکیده
Introduction: Human cortical bone has been demonstrated as an anisotropic material. It has been shown that nanoindentation can be used to quantitatively reveal the anisotropy of cortical bone with the fact that different indentation modulus could be obtained at different indentation directions [1]. However, since nanoindentation analysis is developed based on isotropic material properties, test result from bone material is actually a mixed value [2], which depends on all of the elastic constants of the material in a complex way. Due to the very complicated mechanical problem arising owing to inhomogeneous deformation in the indented materials, finite element analysis is frequently used to study the nanoindentation process. Nanoindentation FEA simulation with bone anisotropic material properties can provide the helpful information to understand bone anisotropic material properties at small scale. In the present study, the effects of anisotropy on nanoindentation measurement with a 3D FEA model were investigated by comparing with experimental value.
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