Computation of Residual Stress Distributions and Opening Angles of 3D Patient‐Specific Arterial Walls
Computation of Residual Stress Distributions and Opening Angles of 3D Patient‐Specific Arterial Walls
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计算 3D 患者特定动脉壁的残余应力分布和张角
DOI：
10.1002/pamm.201510048
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Schröder
中科院分区：
文献类型：
--
作者：
von Hoegen;Schröder
本文讨论了一种考虑动脉残余应力的方法，该方法基于光滑的跨壁应力测量分布和小斜率的假设。动脉首先负荷内部血压，而不考虑任何残余应力。利用合适的应力不变量和特定扇形区域的体积平均平均值，沿径向迭代减小应力梯度。为了评估该方法的准确性，考虑了患有动脉粥样硬化的患者的三维特定动脉几何形状。这些是基于超声医学成像重建的，见[2]。此外，可以用计算得到的残余应力单独加载径向切成薄片的动脉，从而预测打开角。（©2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim）
A method to incorporate residual stresses in arteries, based on the assumption of smooth transmural stress measure distributions with slight slopes, is discussed. The artery is first loaded with the internal blood pressure without considering any residual stresses. With help of suitable stress invariants and volume averaged mean values on specific sectors domains, the stress gradient is iteratively decreased in radial direction. In order to assess the accuracy of the method, a three‐dimensional patient‐specific arterial geometry, suffering from atherosclerosis, is considered. These was reconstructed from ultrasound based medical imaging, see [2]. Moreover, the radially sliced arteries can be loaded exclusively with the calculated residual stresses in order to predict the opening angle. (© 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)