The viscoelastic responses of the human cervical spine in torsion: experimental limitations of quasi-linear theory, and a method for reducing these effects.
Journal Article (Journal Article)
The dynamic torsional viscoelastic responses of the human cadaver cervical spine were measured in vitro. The quasi-linear formulation of time dependent behavior was used to describe and predict the resultant torque as a function of applied angular deflection and time. The performance of the quasi-linear model was good, reaching correlation at the 99% confidence level; however, it tended to underestimate hysteresis energy (mean relative deviation = -19.1%) and observed stiffness. This was in part due to difficulties in establishing the physical constants of the quasi-linear model from finite rate relaxation testing. An extrapolation deconvolution technique to enhance the experimentally derived constants was developed, to reduce the detrimental effects of finite rate testing. The quasi-linear model based on this enhanced derivation showed improved predictive ability and hysteresis energy determination.
Full Text
Duke Authors
Cited Authors
- Myers, BS; McElhaney, JH; Doherty, BJ
Published Date
- January 1, 1991
Published In
Volume / Issue
- 24 / 9
Start / End Page
- 811 - 817
PubMed ID
- 1752865
Electronic International Standard Serial Number (EISSN)
- 1873-2380
International Standard Serial Number (ISSN)
- 0021-9290
Digital Object Identifier (DOI)
- 10.1016/0021-9290(91)90306-8
Language
- eng