Experimental Determination of the Non-linear, Large Strain Zonal Mechanical Properties of Cartilage for Use in Quasi-static Finite Element Model.

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dc.contributor.advisor Dr. Ola Harrysson, Committee Member en_US
dc.contributor.advisor Dr. F. Abrams, Committee Member en_US
dc.contributor.advisor Dr. P. L. Mente, Committee Chair en_US
dc.contributor.author Prasath, Mageswaran en_US
dc.date.accessioned 2010-04-02T18:01:01Z
dc.date.available 2010-04-02T18:01:01Z
dc.date.issued 2005-05-31 en_US
dc.identifier.other etd-05242005-132215 en_US
dc.identifier.uri http://www.lib.ncsu.edu/resolver/1840.16/1130
dc.description.abstract A series of impact tests on porcine cartilage are being conducted to investigate the mechanism of tissue degeneration. In order to investigate the stress distribution over the impact area of the tissue and to correlate that with the available physical data, an Ogden hyperelastic constitutive model for porcine articular cartilage was determined. The Ogden model was determined for surface, mid and deep zones of cartilage. The model will be used as an input for a finite element model for an impact test on cartilage. The inhomogeneous nature of cartilage was also investigated in this study. Tensile and compressive properties of porcine articular cartilage were determined by carrying out uniaxial tensile and compression tests at a high rate of loading. The tests were carried out on 120 — 160 um thick specimens from the surface, mid and deep zones of cartilage. Specimens tested in tension, were obtained from orientations that are parallel to the split-line direction. Deformation measurement for the tensile test was obtained using a high speed camera set at 250 frames/sec. The nonlinear tensile stress-strain relationship of the cartilage specimens from the three zones was approximated mathematically using Fung's exponential equation. It was found that the Fung's model did not provide an adequate fit to the stress-strain relationship of mid and deep zone specimens when compared to that of the surface zone. The Young's modulus for tension and compression was determined from the uniaxial tests. The study found that both tensile and compressive stiffness of cartilage varied with depth. There was a high degree of tension-compression nonlinearity. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject Mechanical property testing en_US
dc.subject Hyperelastic model en_US
dc.subject Cartilage en_US
dc.title Experimental Determination of the Non-linear, Large Strain Zonal Mechanical Properties of Cartilage for Use in Quasi-static Finite Element Model. en_US
dc.degree.name MS en_US
dc.degree.level thesis en_US
dc.degree.discipline Biomedical Engineering en_US


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