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Title: Plastic behaviour of microstructural constituents of cortical bone tissue: a nanoindentation study
Authors: Abdel-Wahab, Adel A.
Silberschmidt, Vadim V.
Keywords: Cortical bone
Issue Date: 2013
Publisher: © Inderscience
Citation: ABDEL-WAHAB, A.A. and SILBERSCHMIDT, V.V., 2013. Plastic behaviour of microstructural constituents of cortical bone tissue: a nanoindentation study. International Journal of Experimental and Computational Biomechanics, 2 (2), pp. 136-157.
Abstract: A mechanical behaviour of bone tissues is defined by mechanical properties of its microstructural constituents. Also, those properties are important as an input for finiteelement models of cortical bone to simulate its deformation and fracture behaviours at the microstructural level. The aim of this study was to investigate a post-yield behaviour of osteonal cortical bone’s microstructural constituents at different loading rates, maximum load levels and dwell times; nanoindentation with a spherical-diamond-tip indenter was employed to determine it. The nanoindentation results revealed significant difference in stiffness values of cortical bone’s microstructural features − interstitial matrix and osteons. Similarly, interstitial matrix exhibited a stiffer post-yield behaviour compared to that of osteons that reflects the relationship between the post-yield behaviour and collagen maturity. In addition, both osteons and interstitial matrix demonstrated a time-dependent behaviour. However, in order to assess elastic-plastic behaviour accurately, an effect of viscosity on nanoindentation results was reduced by using a time-delay method.
Sponsor: The authors acknowledge the financial support from EPSRC UK (grant no. EP/G048886/1).
Version: Accepted for publication
DOI: 10.1504/IJECB.2013.056521
URI: https://dspace.lboro.ac.uk/2134/15575
Publisher Link: http://dx.doi.org/10.1504/IJECB.2013.056521
ISSN: 1755-8735
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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