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Effect of using more realistic thrombosis with three layers of different material properties on axisymmetric finite element model on Abdominal Aortic Aneurysm

机译:三层不同材料性质的更现实的血栓形成方法对腹主动脉瘤轴对称有限元模型的影响

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Abdominal aortic aneurysm (AAA) is a cardiovascular disease occurring when the aorta becomes weak and develops a balloon expansion in its wall that leads to rupture and cause death. Intraluminal thrombus (ILT) which exists in more than 75% of AAA is usually modeled as homogenous material; however, in reality ILT consists of three layers with different material properties. The role of more realistic thrombosis with three layers of different material properties is examined here using two finite element models to understand its effect on wall stresses and it was found that using homogeneous material properties for ILT when modelling AAA could lead to overestimation of the wall stresses and may affect the accuracy of the results.
机译:腹主动脉瘤(AAA)是一种心血管疾病,发生在主动脉变弱并在其壁上形成球囊扩张时导致破裂并导致死亡。通常将75%以上的AAA中存在的腔内血栓(ILT)建模为均质材料。但是,实际上ILT由具有不同材料属性的三层组成。本文使用两个有限元模型研究了具有不同材料属性的三层更实际的血栓形成的作用,以了解其对壁应力的影响,并且发现在对AAA进行建模时对ILT使用均质的材料属性可能会导致高估壁应力并可能影响结果的准确性。

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