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dc.contributor.authorBecker, Winston Reynoldsen_US
dc.date.accessioned2015-12-01T07:00:13Z
dc.date.available2015-12-01T07:00:13Z
dc.date.issued2014-06-08en_US
dc.identifier.othervt_gsexam:3113en_US
dc.identifier.urihttp://hdl.handle.net/10919/64252
dc.description.abstractAlthough mechanical alterations to pelvic floor ligaments, such as the cardinal and uterosacral ligaments, are one contributing factor to the development and progression of pelvic floor disorders, very little research has examined their mechanical properties. In this study, the first biaxial elastic and viscoelastic tests were performed on uterosacral and cardinal ligament complexes harvested from adult female swine. Biaxial elastic testing revealed that the ligaments undergo large strains and are anisotropic. The direction normal to the upper vagina was typically stiffer than the transverse direction. Stress relaxation tests showed that the relaxation was the same in both directions, and that more relaxation occurred when the tissue was stretched to lower initial strains. In order to describe the experimental findings, a three-dimensional constitutive model based on the Pipkin-Rogers integral series was formulated and the parameters of such model were determined by fitting the model to the experimental data. In formulating the model, it was assumed that the tissues consist of a ground substance with two embedded families of fibers oriented in two directions and that the ligaments are incompressible. The model accounts for finite strains, anisotropy, and strain-dependent stress relaxation behavior. This study provides information about the mechanical behavior of female pelvic floor ligaments, which should be considered in the development of new treatment methods for pelvic floor disorders.en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsThis Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).en_US
dc.subjectCardinal Ligamenten_US
dc.subjectUterosacral Ligamenten_US
dc.subjectPelvic Floor Disordersen_US
dc.subjectViscoelasticityen_US
dc.subjectStress Relaxationen_US
dc.titleBiaxial Mechanical Behavior of Swine Pelvic Floor Ligaments: Experiments and Modelingen_US
dc.typeThesisen_US
dc.contributor.departmentEngineering Science and Mechanicsen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineEngineering Mechanicsen_US
dc.contributor.committeechairDe Vita, Raffaellaen_US
dc.contributor.committeememberJung, Sunghwanen_US
dc.contributor.committeememberSocha, Johnen_US


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