1. Linear viscoelasticity - bone volume fraction relationships of bovine trabecular bone.
- Author
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Manda, Krishnagoud, Xie, Shuqiao, Wallace, Robert, Levrero-Florencio, Francesc, and Pankaj, Pankaj
- Subjects
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VISCOELASTICITY , *CANCELLOUS bone , *RELAXATION for health , *FINITE element method , *CREEP (Materials) - Abstract
Trabecular bone has been previously recognized as time-dependent (viscoelastic) material, but the relationships of its viscoelastic behaviour with bone volume fraction (BV/TV) have not been investigated so far. Therefore, the aim of the present study was to quantify the time-dependent viscoelastic behaviour of trabecular bone and relate it to BV/TV. Uniaxial compressive creep experiments were performed on cylindrical bovine trabecular bone samples ( $$\textit{n}\,{=}\,13$$ ) at loads corresponding to physiological strain level of 2000 $${\upmu }{\upvarepsilon }$$ . We assumed that the bone behaves in a linear viscoelastic manner at this low strain level and the corresponding linear viscoelastic parameters were estimated by fitting a generalized Kelvin-Voigt rheological model to the experimental creep strain response. Strong and significant power law relationships ( $$r^2\,{=}\,0.73,\ p\,{<}\,0.001$$ ) were found between time-dependent creep compliance function and BV/TV of the bone. These BV/TV-based material properties can be used in finite element models involving trabecular bone to predict time-dependent response. For users' convenience, the creep compliance functions were also converted to relaxation functions by using numerical interconversion methods and similar power law relationships were reported between time-dependent relaxation modulus function and BV/TV. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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