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Quasi-static and Dynamic Nanoindentation Testing of Lamellar and Inter-lamellar Trabecular Bone

Published online by Cambridge University Press:  10 February 2011

Thorsten Staedler ,
Eve Donnelly ,
Marjolein C. H. van der Meulen  and
Shefford P. Baker
Thorsten Staedler
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY
Eve Donnelly
Affiliation:
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY
Marjolein C. H. van der Meulen
Affiliation:
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY
Shefford P. Baker
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY
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Abstract

Bone is a complex natural composite with a lamellar structure on the micro scale. In this study, scanning nanoindentation was used to assess the mechanical properties of individual lamellar and inter-lamellar components of trabecular bone under static and dynamic loading conditions. The combination of careful sample preparation, good topographical characterization of the sample surface, and a scanning nanoindenter provided insight into the mechanical properties of the individual lamellar structures. The results of quasi-static, as well as dynamic nanoindentation tests of bone are reported and discussed.

A surface roughness of only 18-20 nm RMS was achieved. Nonetheless, indentation depths in the range of 100 nm and above were required in order to minimize the effect of topography on the measurement. This requirement conflicts with the need to keep the probed volume small enough to sample only one component at a time. A simple volume-averaging model was developed and used as a tool to determine when individual lamellar bone structures were being probed and to help determine the properties of the lamellar and inter-lamellar materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 778: Symposium U – Mechanical Properties Derived from Nanostructuring Materials , 2003 , U3.14
Copyright
Copyright © Materials Research Society 2002

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