Predictions of aneurysm formation in distensible tubes: Part B-Application and comparison of alternative approaches
Predictions of aneurysm formation in distensible tubes: Part B-Application and comparison of alternative approaches
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DOI：
10.1016/j.ijmecsci.2013.02.008
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发表时间：
2013-05-01
影响因子：
7.3
通讯作者：
Hearn, Grant E.
中科院分区：
文献类型：
--
作者：
Bucchi, Andrea;Hearn, Grant E.
配套论文的理论论文提出了三种复杂性不断增加的不同方法。正如所提出的理论同样适用于其他医学、科学或工程应用一样，现在报道的系统数值研究也与这些研究领域相关。独立开发的有限元分析 (FEA) 解决方案用于表明所选的商业包提供了一致数量级的临界压力预测。 FEA 灵敏度分析考虑了五个不同的元素，以及多达七个替代应变能函数以及单轴、等双轴和纯剪切数据集的不同组合，以确定对临界压力预测和加压可膨胀管整体行为的影响。这是公开文献中最全面的比较研究。对于选定的应变能函数，研究了长度变化对初始半径和壁厚变化对初始半径的影响。此后证明，这两个比率而不是实际尺寸是加压管行为背后的驱动因素。 (C) 2013 年，爱思唯尔有限公司出版。
The theoretical treatise of the companion paper produced three distinct approaches of increasing complexity. Just as the presented theory is equally applicable to other medical, scientific or engineering applications, so the systematic numerical investigation now reported is relevant to these fields of study. An independently developed finite element analysis (FEA) solution is used to show that the commercial package selected provides critical pressure predictions of a consistent order of magnitude. The FEA sensitivity analysis considers five distinct elements with up to seven alternative strain-energy functions and different combinations of uniaxial, equi-biaxial and pure shear data sets to identify the effect on critical pressure prediction and overall behaviour of a pressurised distensible tube. This represents the most comprehensive comparative study available in the open literature. For a selected strain-energy function the impact of the variation of length to initial radius and wall thickness to initial radius are investigated. Thereafter it is demonstrated that these two ratios rather than actual dimensions are the driving factors behind pressurised tube behaviour. (C) 2013 Published by Elsevier Ltd.