Viscoelastic and failure properties of spine ligament collagen fascicles
| Autor: | Robert S. Salzar, Francis H. Shen, Richard W. Kent, Scott R. Lucas, Jeffrey Richard Crandall, Cameron R. Bass |
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| Rok vydání: | 2009 |
| Předmět: |
Time Factors
Materials science Swine Finite Element Analysis Viscoelasticity Tensile Strength Ultimate tensile strength medicine Animals Posterior longitudinal ligament Computer Simulation Composite material Ligaments Models Statistical Viscosity Mechanical Engineering Biomechanics Reproducibility of Results Equipment Design Strain rate Fascicle Elasticity Spine Biomechanical Phenomena Longitudinal Ligaments medicine.anatomical_structure Modeling and Simulation Finite strain theory Ligaments Articular Ligament Collagen Stress Mechanical Biotechnology |
| Zdroj: | Biomechanics and Modeling in Mechanobiology. 8:487-498 |
| ISSN: | 1617-7940 1617-7959 |
| DOI: | 10.1007/s10237-009-0152-7 |
| Popis: | The microstructural volume fractions, orientations, and interactions among components vary widely for different ligament types. If these variations are understood, however, it is conceivable to develop a general ligament model that is based on microstructural properties. This paper presents a part of a much larger effort needed to develop such a model. Viscoelastic and failure properties of porcine posterior longitudinal ligament (PLL) collagen fascicles were determined. A series of subfailure and failure tests were performed at fast and slow strain rates on isolated collagen fascicles from porcine lumbar spine PLLs. A finite strain quasi-linear viscoelastic model was used to fit the fascicle experimental data. There was a significant strain rate effect in fascicle failure strain (P < 0.05), but not in failure force or failure stress. The corresponding average fast-rate and slow-rate failure strains were 0.098 ± 0.062 and 0.209 ± 0.081. The average failure force for combined fast and slow rates was 2.25 ± 1.17 N. The viscoelastic and failure properties in this paper were used to develop a microstructural ligament failure model that will be published in a subsequent paper. |
| Databáze: | OpenAIRE |
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