A linearized and incompressible constitutive model for arteries.
A linearized and incompressible constitutive model for arteries.
复制标题
DOI:
10.1016/j.jtbi.2011.05.005
复制
发表时间:
2011-10-07
影响因子:
2
通讯作者:
Kassab, G. S.
中科院分区:
文献类型:
--
作者:
Liu, Y.;Zhang, W.;Wang, C.;Kassab, G. S.
In many biomechanical studies, blood vessels can be modeled as pseudoelastic orthotropic materials that are incompressible (volume-preserving) under physiological loading. To use a minimum number of elastic constants to describe the constitutive behavior of arteries, we adopt a generalized Hooke’s law for the co-rotational Cauchy stress and a recently proposed logarithmic-exponential strain. This strain tensor absorbs the material nonlinearity and its trace is zero for volume-preserving deformations. Thus, the relationships between model parameters due to the incompressibility constraint are easy to analyze and interpret. In particular, the number of independent elastic constants reduces from ten to seven in the orthotropic model. As an illustratory study, we fit this model to measured data of porcine coronary arteries in inflation-stretch tests. Four parameters, n (material nonlinearity), Young’s moduli E1 (circumferential), E2 (axial), and E3 (radial) are necessary to fit the data. The advantages and limitations of this model are discussed.
登录
查看更多内容
影响因子:
3.8
作者:
Chen, Kinon;Fata, Bahar;Einstein, Daniel R.
通讯作者:
Einstein, Daniel R.
影响因子:
2.7
作者:
Itskov, M;Aksel, N
通讯作者:
Aksel, N
影响因子:
2.4
作者:
Rachev, A
通讯作者:
Rachev, A
影响因子:
2
作者:
Holzapfel, GA;Gasser, TC;Ogden, RW
通讯作者:
Ogden, RW
影响因子:
2.7
作者:
LIU, DC;NOCEDAL, J
通讯作者:
NOCEDAL, J