| Simulation of high tensile Poisson's ratios of articular cartilage with a finite element fibril-reinforced hyperelastic model. | |
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MedLine Citation:
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PMID: 17690001 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Analyses with a finite element fibril-reinforced hyperelastic model were undertaken in this study to simulate high tensile Poisson's ratios that have been consistently documented in experimental studies of articular cartilage. The solid phase was represented by an isotropic matrix reinforced with four sets of fibrils, two of them aligned in orthogonal directions and two oblique fibrils in a symmetric configuration respect to the orthogonal axes. Two distinct hyperelastic functions were used to represent the matrix and the fibrils. Results of the analyses showed that only by considering non-orthogonal fibrils was it possible to represent Poisson's ratios higher than one. Constrains in the grips and finite deformations played a minor role in the calculated Poisson's ratio. This study also showed that the model with oblique fibrils at 45 degrees was able to represent significant differences in Poisson's ratios near 1 documented in experimental studies. However, even considering constrains in the grips, this model was not capable to simulate Poisson's ratios near 2 that have been reported in other studies. The study also confirmed that only with a high relation between the stiffness of the fibers and that of the matrix was it possible to obtain high Poisson's ratios for the tissue. Results suggest that analytical models with a finite number of fibrils are appropriate to represent main mechanical effects of articular cartilage. |
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Authors:
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José Jaime García |
Publication Detail:
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Type: Journal Article Date: 2007-08-08 |
Journal Detail:
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Title: Medical engineering & physics Volume: 30 ISSN: 1350-4533 ISO Abbreviation: Med Eng Phys Publication Date: 2008 Jun |
Date Detail:
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Created Date: 2008-06-03 Completed Date: 2008-09-24 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422753 Medline TA: Med Eng Phys Country: England |
Other Details:
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Languages: eng Pagination: 590-8 Citation Subset: IM |
Affiliation:
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Escuela de Ingeniería Civil y Geomática, Universidad del Valle, Calle 13, Carrera 100, Edificio 350, Cali, Colombia. josejgar@univalle.edu.co |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cartilage, Articular
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physiology* Elasticity Finite Element Analysis* Models, Biological* Range of Motion, Articular Tensile Strength |
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