IEJCB Nanoindentation_LUPIN.pdf (511.47 kB)
Plastic behaviour of microstructural constituents of cortical bone tissue: a nanoindentation study
journal contribution
posted on 2014-08-15, 14:27 authored by Adel A. Abdel-Wahab, Vadim SilberschmidtVadim SilberschmidtA 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.
Funding
The authors acknowledge the financial support from EPSRC UK (grant no. EP/G048886/1).
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
Int. J. Exper. Comput. Biomech.Volume
2Issue
2Pages
136 - 157Citation
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.Publisher
© InderscienceVersion
- AM (Accepted Manuscript)
Publication date
2013ISSN
1755-8735eISSN
1755-8743Publisher version
Language
- en