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  • The aim of the study was to verify whether constitutive model parameters obtained from quasistatic inflation-extension test could be used for in-vivo computational simulation of venous graft used as bypass at arterial conditionns. Inflation tests of human vena saphena magna at three loading rates were performed: a quasistatic (slow), moderate, and fast, which was similar to human heart rate. The experimental data were fitted by hyperelastic nonlinear anisotropic constitutive model (Holzapfel-Gasser-Ogden) in order to obtain material parameters. It was found that parameters differ significantly with respect to loading rate. Especially the parameter related to large strain stiffening (k2) increased with loading rate. The results suggest that constitutive parameters are strongly influ-enced by experimental conditions which we interpret as viscoe-lasticity of the vein grafts.
  • The aim of the study was to verify whether constitutive model parameters obtained from quasistatic inflation-extension test could be used for in-vivo computational simulation of venous graft used as bypass at arterial conditionns. Inflation tests of human vena saphena magna at three loading rates were performed: a quasistatic (slow), moderate, and fast, which was similar to human heart rate. The experimental data were fitted by hyperelastic nonlinear anisotropic constitutive model (Holzapfel-Gasser-Ogden) in order to obtain material parameters. It was found that parameters differ significantly with respect to loading rate. Especially the parameter related to large strain stiffening (k2) increased with loading rate. The results suggest that constitutive parameters are strongly influ-enced by experimental conditions which we interpret as viscoe-lasticity of the vein grafts. (en)
Title
  • Inflation Tests of Vena Saphena Mangna for Different Loading Rates
  • Inflation Tests of Vena Saphena Mangna for Different Loading Rates (en)
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  • Inflation Tests of Vena Saphena Mangna for Different Loading Rates
  • Inflation Tests of Vena Saphena Mangna for Different Loading Rates (en)
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  • RIV/68407700:21220/14:00207485!RIV15-MSM-21220___
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  • S
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  • 21292
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  • RIV/68407700:21220/14:00207485
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  • inflation test; saphenous vein; constitutive model; CAGB; loading rate (en)
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  • [DD8963005EC8]
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  • Sevilla
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  • Heidelberg
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  • XIII Mediterranean Conference on Medical and Biological Engineering and Computing 2013
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  • Chlup, Hynek
  • Horný, Lukáš
  • Veselý, Jan
  • Žitný, Rudolf
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http://linked.open.../riv/zahajeniAkce
issn
  • 1680-0737
number of pages
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  • 10.1007/978-3-319-00846-2_258
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  • Springer-Verlag
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  • 978-3-319-00845-5
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  • 21220
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