Viscoelastic characterization of woven Dacron for aortic grafts by using direction-dependent quasi-linear viscoelasticity

被引：27

作者：

Amabili, Marco ^{[1
]}

Balasubramanian, Prabakaran ^{[1
]}

Breslavsky, Ivan ^{[1
]}

Ferrari, Giovanni ^{[1
]}

Tubaldi, Eleonora ^{[1
]}

机构：

[1] McGill Univ, Dept Mech Engn, Macdonald Engn Bldg,817 Sherbrooke St West, Montreal, PQ H3A 0C3, Canada

来源：

JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | 2018年 / 82卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Viscoelasticity; Quasi-linear; Relaxation; Dacron; Graft; Dynamic modulus; STRESS-RELAXATION; SOFT-TISSUE; STRAIN; MODEL;

D O I：

10.1016/j.jmbbm.2018.03.038

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

In case of direction-dependent viscoelasticity, a simplified formulation of the three-dimensional quasi-linear viscoelasticity has been obtained manipulating the original Fung equation. The experimental characterization of the static hyperelastic behaviour, the relaxation, the dynamic modulus and the loss factor of woven Dacron from a commercial aortic prosthesis has been performed. An 11% difference of the reduced relaxation (after infinite time) between axial and circumferential directions has been observed for the woven Dacron. A very large increase in stiffness is obtained in case of harmonic loading with respect to the static loading. These findings are particularly relevant for dynamic modelling of currently used aortic grafts.

引用

页码：282 / 290

页数：9

共 34 条

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