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Evaluation of Indentation Test for Measuring Young’s Modulus of Cancellous Bone

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Abstract:

The indentation test has been in the spotlight due to easy and non-destructive testing characteristics. However, there are little studies for the indentation test of porous materials in the evaluation aspect of methodology. The goal of this study was to evaluate a spherical indentation test in the aspect of indenter-size and indentation depth by measuring elastic modulus of porous materials such as a cancellous bone using a FEM. We developed a microstructure-based FE model of cancellous bone with apparent density 0.2~0.8 g/cm3 in order to simulate uniaxial compression test and indentation test in the light of anatomical observation with a scanning electron microscope (SEM). We obtained a load-displacement curve through the indentation simulation and calculated the Young’s modulus of cancellous structure based on Pharr's hypothesis. The result indicated that indenter diameter has to be more than five times of pore size and indentation depth should be about 8% of indenter diameter at least to obtain the appropriate result of the indentation test. It is expected that this result may guide to the design and the simulation of indentation test for porous materials

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Periodical:

Materials Science Forum (Volumes 544-545)

Pages:

307-310

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.544-545.307

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Online since:

May 2007

Authors:

Moon Kyu Lee, Kui Won Choi, Tae Soo Lee, H.N. Lim

Keywords:

Cancellous Bone, Finite Element Model (FEM), Spherical Indentation, Young's Modulus

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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