Poisson’s Ratio of Nucleus Pulposus Tissue: Comparison of Experimental Results with a Biphasic Poroviscoelastic Finite Element Model
نویسنده
چکیده
Experimental values for the Poisson’s ratio of the nucleus pulposus (NP) are limited. Unconfined compression tests were conducted on bovine NP samples to determine apparent and true values of Poisson’s ratio. A biphasic poroviscoelastic (BPVE) finite element model was created to mimic the experimental conditions for comparison. The true Poisson’s ratio of the solid phase of NP tissue was found to be 0.125±0.072. The model captured the key mechanical behaviour of the tissue: future modelling should not model the NP as an incompressible fluid, but rather as a BPVE tissue.
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تاریخ انتشار 2012