Computation for biomechanical analysis of aortic aneurysms: the importance of computational grid

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Abstract

Aortic wall stress is the most common variable of interest in abdominal aortic aneurysm (AAA) rupture risk assessment. Computation of such stress has been dominated by finite element analysis. However, the effects of finite element (FE) formulation, element quality, and methods of FE mesh construction on the efficiency, robustness, and accuracy of such computation have attracted little attention. In this study, we fill this knowledge gap by comparing the results of the calculated aortic wall stress for ten AAA patients using tetrahedral and hexahedral meshes when varying the FE formulation (displacement-based and hybrid), FE shape functions, spatial integration scheme, and number of elements through the wall thickness.

Original languageEnglish
Number of pages17
JournalComputer Methods in Biomechanics and Biomedical Engineering
DOIs
Publication statusE-pub ahead of print - 2 Jun 2023

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