Inflation Tests of Vena Saphena Mangna for Different Loading Rates

  • J. Veselý
  • L. Horný
  • H. Chlup
  • R. Žitný
Conference paper
Part of the IFMBE Proceedings book series (IFMBE, volume 41)

Abstract

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 influenced by experimental conditions which we interpret as viscoelasticity of the vein grafts.

Keywords

inflation test saphenous vein constitutive model CAGB loading rate 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • J. Veselý
    • 1
  • L. Horný
    • 1
  • H. Chlup
    • 1
  • R. Žitný
    • 2
  1. 1.Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering Czech TechnicalUniversity in PraguePragueCzech Republic
  2. 2.Department of Process Engineering, Faculty of Mechanical Engineering Czech TechnicalUniversity in PraguePragueCzech Republic

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