Event Title

Mechanical characterization and constitutive modeling of tensile behavior of bovine aorta

Session

Civil Engineering, Infrastructure and Environment

Description

An experimental campaign consisting in uniaxial tensile tests is conducted on several bovine aorta specimens with the aim of developing and calibrating a hyperelastic model for the tissue. Bovine aorta partially reflects the behavior of human aorta, which will be tested soon. This kind of biological materials present hyperelasticity, strain-rate dependency, relaxation, Mullins- like unloading effect and, eventually, anisotropy due to collagen fibers that are evenly dispersed in the structure. Mechanical tests show quite a high dispersion. The modelling approach, based on the Holzapfel’s skin constitutive equation and expressed in terms of invariants, demonstrates to be adequate in describing the nonlinear-hyperelastic behavior.

Keywords:

Hyperelastic material, Mechanical behavior, aorta, stent surgery

Session Chair

Feti Selmani

Session Co-Chair

Anjeza Alaj

Proceedings Editor

Edmond Hajrizi

ISBN

978-9951-437-69-1

Location

Pristina, Kosovo

Start Date

27-10-2018 10:45 AM

End Date

27-10-2018 12:15 PM

DOI

10.33107/ubt-ic.2018.60

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Oct 27th, 10:45 AM Oct 27th, 12:15 PM

Mechanical characterization and constitutive modeling of tensile behavior of bovine aorta

Pristina, Kosovo

An experimental campaign consisting in uniaxial tensile tests is conducted on several bovine aorta specimens with the aim of developing and calibrating a hyperelastic model for the tissue. Bovine aorta partially reflects the behavior of human aorta, which will be tested soon. This kind of biological materials present hyperelasticity, strain-rate dependency, relaxation, Mullins- like unloading effect and, eventually, anisotropy due to collagen fibers that are evenly dispersed in the structure. Mechanical tests show quite a high dispersion. The modelling approach, based on the Holzapfel’s skin constitutive equation and expressed in terms of invariants, demonstrates to be adequate in describing the nonlinear-hyperelastic behavior.