NDLI: Poisson’s Ratio and Strain Rate Dependency of the Constitutive Behavior of Spinal Dura Mater

Content Provider	Springer Nature Link
Author	Persson, Cecilia Evans, Sam Marsh, Rainy Summers, Jon L. Hall, Richard M.
Copyright Year	2010
Abstract	Knowledge of the mechanical behavior of spinal dura mater is important for a number of applications including the experimental and computational modeling of physiological phenomena and spinal cord trauma. However, mechanical characterization of dura mater is relatively sparse and is further compounded by the use of the tangent modulus as the sole measure of stiffness. This study aims to provide a more complete description of the mechanical properties of spinal dura mater, including the effect of strain rate. Bovine dura mater was tested under uniaxial tension in both the longitudinal and the circumferential directions at three different strain rates; 0.01, 0.1, and 1.0 s−1. An Ogden model was fitted to the resulting stress–stretch data. The morphology of the dura mater was assessed using Sirius red and H&E staining. No significant effect of the strain rate was found for the Ogden model parameters. Longitudinal specimens were significantly stronger and more deformable than circumferential samples, probably due to the structural arrangement of the collagen fibers. At low strains, however, the circumferential specimens were stiffer than the longitudinal ones. The findings of this study will allow more complete representations of the spinal dura mater to be developed.
Starting Page	975
Ending Page	983
Page Count	9
File Format	PDF
ISSN	00906964
Journal	Annals of Biomedical Engineering
Volume Number	38
Issue Number	3
e-ISSN	15739686
Language	English
Publisher	Springer US
Publisher Date	2010-01-20
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spinal dura mater Material properties Circumferential Longitudinal Strain rate Poisson’s ratio Biochemistry Mechanics Biophysics and Biological Physics Biomedical Engineering Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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