A combined growth and remodeling framework for the approximation of residual stresses in arterial walls
A combined growth and remodeling framework for the approximation of residual stresses in arterial walls
复制标题
用于近似动脉壁残余应力的组合生长和重塑框架
DOI:
10.1002/zamm.201700273
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
D. Balzani
中科院分区:
文献类型:
--
作者:
A. Zahn;D. Balzani
A combined model of multiplicative growth and fiber remodeling in the sense of a reorientation of the collagen fibers is proposed for the simulation of adaptation processes in arterial tissues, where both mechanisms are supposed to be governed by the intensity and the direction of the principal stresses. The generalized formulation of the growth tensor includes up to three perpendicular anisotropy directions, which are defined based on the local principal stress state. Remodeling is incorporated in a straightforward manner by formulating a scalar evolution equation for the angle between the existing and the target fiber orientation vectors. In numerical examples on idealized arterial segments, the fiber remodeling algorithm is illustrated and a comparison of different approaches for the growth tensor with respect to stresses in the loaded state, fiber angles and residual stresses is conducted.
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