Three-dimensional finite element analysis of the effects of anisotropy on bone mechanical properties measured by nanoindentation

Fan, Z., Rho, J.Y. and Swadener, J.G. (2004). Three-dimensional finite element analysis of the effects of anisotropy on bone mechanical properties measured by nanoindentation. Journal of Materials Research, 19 (1), pp. 114-123.

Abstract

A three-dimensional finite element analysis (FEA) model with elastic-plastic anisotropy was built to investigate the effects of anisotropy on nanoindentation measurements for cortical bone. The FEA model has demonstrated a capability to capture the cortical bone material response under the indentation process. By comparison with the contact area obtained from monitoring the contact profile in FEA simulations, the Oliver-Pharr method was found to underpredict or overpredict the contact area due to the effects of anisotropy. The amount of error (less than 10% for cortical bone) depended on the indentation orientation. The indentation modulus results obtained from FEA simulations at different surface orientations showed a trend similar to experimental results and were also similar to moduli calculated from a mathematical model. The Oliver-Pharr method has been shown to be useful for providing first-order approximations in the analysis of anisotropic mechanical properties of cortical bone, although the indentation modulus is influenced by anisotropy.

Publication DOI: https://doi.org/10.1557/jmr.2004.19.1.114
Divisions: Engineering & Applied Sciences > Mechanical engineering & design
Engineering & Applied Sciences
Additional Information: Copyright 2009 Elsevier B.V., All rights reserved.
Uncontrolled Keywords: bone,nanoindentation,elastic properties
Full Text Link: http://journals ... 884291400085915
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2004
Authors: Fan, Z.
Rho, J.Y.
Swadener, J.G. ( 0000-0001-5493-3461)

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