Stress Analysis in Layered Aortic Arch model: Influence of Arch Aneurysm and Wall Stiffness

Abstract

Stress Analysis in Layered Aortic Arch model: Influence of Arch Aneurysm and Wall Stiffness F. Gao1, D. Tang2∗, Z. Guo3, Makoto Sakamoto4 and T. Matsuzawa5 Summary Patients with aortic aneurysm, especially aortic arch aneurysm, are prone to aortic dissection. For investigation of the effects of aneurysm and wall stiffness on wall stress distribution, a nonaneurysm arch model as well as an aneurysm arch model was constructed. The fluid structure interaction was implemented in the arch model of aorta. The results show that the stresses are much higher at inflection points in the aneurysm model than in nonaneurysm model, and the stresses at media in stiffened wall are higher than in unstiffened wall. The high composite stress is located at inflection points and is much higher in the aneurysm model. The arch aneurysm and wall stiffening are important determinants of peak wall stress in aortic wall.