Numerical simulation of residual stresses in arterial walls
Numerical simulation of residual stresses in arterial walls
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DOI：
10.1016/j.commatsci.2005.11.014
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发表时间：
2007-03-01
影响因子：
3.3
通讯作者：
Gross, D.
中科院分区：
文献类型：
--
作者：
Balzani, D.;Schroeder, J.;Gross, D.
提出了一种无血压条件下动脉壁残余应力数值模拟的方法。在某种意义上，切片动脉可被视为“无应力”参考构型，这在文献中已得到充分证实。为了闭合切片动脉的开放透壁表面之间的差距，应用位移驱动程序，其在相关节点的相对位移中被公式化，类似于在界面元素的框架中。随后，一个新的网格被认为是代表本征应力状态，没有这些界面元素。这对于进一步的数值模拟是有利的，施加内部压力。最后，将所提出的方法应用于动脉粥样硬化的动脉，以提供一个数值例子，模拟动脉中的残余应力。(c)2006 Elsevier B.V.保留所有权利。
A method for the numerical simulation of residual stresses occurring in arterial walls without blood pressure is proposed. It is quite well established in the literature that a sliced artery may be considered as a "stress-free" reference configuration, in some sense. In order to close the gap between the opened transmural surfaces of a sliced artery, a displacement-driven procedure is applied which is formulated in the relative displacement of associated nodal points, similar as in the framework of interface elements. Subsequently, a new mesh is considered, representing the eigenstress state without these interface elements. This is advantageous for further numerical simulations as e.g., applying an internal pressure. Finally, the proposed method is applied to an atherosclerotic artery in order to provide a numerical example for the simulation of residual stresses in arteries. (c) 2006 Elsevier B.V. All rights reserved.