Investigation of the Stability of Atherosclerotic Arteries Using Fluid-Structure Interaction

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Manzoori a.; FALLAH F.

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Journal: Modares Mechanical Engineering Year:2019 | Volume:19 | Issue:3 Page(s): 677-686

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Information Journal Paper

Title

Investigation of the Stability of Atherosclerotic Arteries Using Fluid-Structure Interaction

Author(s)

Manzoori a. | FALLAH F. | Issue Writer Certificate

Keywords

Artery bucklingQ1

AtherosclerosisQ1

Fluid-structure interactionQ1

Critical buckling pressureQ1

Plaque ruptureQ1

Abstract

Tortuosity is an abnormality that may occur in some arteries such as carotid. It disrupts blood flow to the brain and, even in severe cases, causes ischemia and stroke. Tortuosity can be congenital or occurs due to hypertension and reduced axial pre-stretch of the artery that is buckling. Since atherosclerotic plaques disrupt the normal pattern of blood flow, and, thus, make the artery more susceptible to buckling, in this study, the effect of atherosclerotic plaques on arterial stability has been investigated, using a computational simulation of fluidstructure interaction under pulsatile flow and large deformation. Ideal and 3D geometry of normal and atherosclerotic carotid artery with different plaques (symmetric or asymmetric and in different percentage of stenosis) were constructed and used to simulate normal (1. 5) and reduced (1. 3) axial stretch ratio by ADINA Finite Element Analysis Software. The blood flow was assumed to be Newtonian and laminar. Arterial wall was considered as an anisotropic and hyperelastic material based on the Ogden’ s model. The results show that stenosis reduces the Critical buckling pressure and arteries with asymmetric plaque have lower Critical buckling pressure compared to the arteries with symmetric plaque. By reducing the axial stretch ratio from 1. 5 to 1. 3, the Critical buckling pressure is reduced by 33-39%. Buckling increases the peak stress in the plaque and, thus, increases the risk of Plaque rupture.

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APA: Copy

Manzoori, a., & FALLAH, F.. (2019). Investigation of the Stability of Atherosclerotic Arteries Using Fluid-Structure Interaction. MODARES MECHANICAL ENGINEERING, 19(3 ), 677-686. SID. https://sid.ir/paper/179832/en

Vancouver: Copy

Manzoori a., FALLAH F.. Investigation of the Stability of Atherosclerotic Arteries Using Fluid-Structure Interaction. MODARES MECHANICAL ENGINEERING[Internet]. 2019;19(3 ):677-686. Available from: https://sid.ir/paper/179832/en

IEEE: Copy

a. Manzoori, and F. FALLAH, “Investigation of the Stability of Atherosclerotic Arteries Using Fluid-Structure Interaction,” MODARES MECHANICAL ENGINEERING, vol. 19, no. 3 , pp. 677–686, 2019, [Online]. Available: https://sid.ir/paper/179832/en

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