CUED Publications database

Viscoelastic properties of bone as a function of hydration state determined by nanoindentation

Bembey, AK and Oyen, ML and Bushby, AJ and Boyde, A (2006) Viscoelastic properties of bone as a function of hydration state determined by nanoindentation. Philosophical Magazine, 86. pp. 5691-5703. ISSN 1478-6435

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Abstract

Spherical indentation creep testing was used to examine the effect of hydration state on bone mechanical properties. Analysis of creep data was based on the elastic-viscoelastic correspondence principle and utilized a direct solution for the finite loading-rate experimental conditions. The zero-time shear modulus was computed from the creep compliance function and compared to the indentation modulus obtained via conventional indentation analysis, based on an elastic unloading response. The method was validated using a well-known polymer material under three different loading conditions. The method was applied to bone samples prepared with different water content by partial exchange with ethanol, where 70% ethanol was considered as the baseline condition. A hydration increase was associated with a 43% decrease in stiffness, while a hydration decrease resulted in a 20% increase in bone tissue stiffness.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:41
Last Modified: 08 Dec 2014 02:12
DOI: 10.1080/14786430600660864