Hyperelastic behavior of porcine aorta segment under extension-inflation tests fitted with various phenomenological models

• Autorzy: Veljković D. Ž. , Ranković V. J. , Pantović S. B. , Rosić M. A. , Kojić M. R.

Identyfikatory

DOI

10.5277/abb140305

• Języki publikacji: EN

Abstrakty

EN

Most of hyperelastic models for the constitutive modeling of the typical mechanical behaviour of the arterial wall tissue in literature are based on the test data from different animals and arteries. This paper is concerned with the material parameter identification of several phenomenological hyperelastic models by fitting the data from five extension-inflation tests of the porcine aorta segment, carried out in our laboratory. A membrane approximation is used to compute stresses and strains achieved during experiments, with usual assumption of material incompressibility. Three orthotropic two-dimensional strain-energy functions, based on use of the Green-Lagrange strains, are fitted to the test data: the well-known Fung’s exponential model; the classical polynomial model with seven constants; and the logarithmic model; as also, two three-dimensional models are employed: polyconvex anisotropic exponential hyperelastic model and the convex isotropic exponential rubber-like hyperelastic constitutive law depending on the first invariant of the right Cauchy-Green deformation tensor. It is found that isotropic model overestimates values of stresses in axial, and underestimates values of stresses in circumferential direction of artery segment, due to pronounced tissue anisotropy. Also, all considered two-dimensional models give good and similar prediction, while the polyconvex model demonstrates slightly lower performance in the axial direction of artery.

Słowa kluczowe

EN

material parameters identification; mechanical properties; porcine aorta; strain energy function

PL

parametry mechaniczne; aorta; badania na zwierzętach; identyfikacja

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2014
• Tom: Vol. 16, no. 3
• Strony: 37--45
• Opis fizyczny: Bibliogr. 25 poz., rys., wykr.

Twórcy

autor

Veljković D. Ž.

• Research and Development Center for Bioengineering BioIRC, Kragujevac, Serbia

autor

Ranković V. J.

• Research and Development Center for Bioengineering BioIRC, Kragujevac, Serbia
• Faculty of Economics, University of Kragujevac, Kragujevac, Serbia

autor

Pantović S. B.

• Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia

autor

Rosić M. A.

• Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia

autor

Kojić M. R.

• Research and Development Center for Bioengineering BioIRC, Kragujevac, Serbia
• The Methodist Hospital Research Institute, Houston

Bibliografia

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