Residual strains in the arterial wall: A 3D finite element model

✍ Scribed by He, Fan ;Li, Xiao-Yang

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 331 KB
• Volume: 24
• Category: Article
• ISSN: 1069-8299
• DOI: 10.1002/cnm.1035

✦ Synopsis

Abstract

The objective of the study is to set up a three‐dimensional (3D) finite element model to study the effects of residual strains on the circumferential stresses and strains in the arterial wall. The 3D model will make numerical calculations of interaction between blood and the vessel wall with residual strains easier in the future. The arterial wall was assumed to be isotropic and linear elastic, and then residual strains were applied in three steps while the physiological point was set to 100 mmHg. The measurements of the circumferential stress and strain distributions were performed under six different blood pressures, namely 80, 100, 120, 150, 180 and 200 mmHg. The circumferential stress levels changed from 50–150 kPa to −11–80 kPa, but the circumferential strain levels remained 0.05–0.15 in the 80–200 mmHg pressure range. The opening angle of the arterial ring was 7°. Residual strains make the circumferential stress and strain distributions in the arterial wall more uniform across the wall thickness. The proposed 3D finite element model gives valid results. Copyright © 2007 John Wiley & Sons, Ltd.