PMID: 3747472Aug 1, 1986Paper

Inflation waves induced by axial acceleration of the aorta

Journal of Biomechanical Engineering
D EladY Kivity

Abstract

The phenomenon of high-amplitude inflation waves resulting from a sharp axial acceleration of the aorta, as may occur in road accidents, is investigated theoretically. The aorta is modeled as an axisymmetric tapered membranic shell (tube) made of an incompressible, nonlinear viscoelastic material with cylindrical orthotropy. It is filled with an inviscid, incompressible fluid whose flow is considered as quasi-one dimensional along the tube axis. The equations of motion of the tube and of the fluid are solved numerically, by using a two-step explicit scheme, for several axial acceleration profiles. The solutions shows that an inflation wave is generated and it propagates in opposite direction to that of the acceleration. The wall stresses, deformations and their time derivatives as well as fluid velocity and pressure are determined along the tube at different time intervals. Peak axial and circumferential stresses are high, with the latter far exceeding the former. These stresses may cause rupture of the aorta.

Citations

Jan 1, 1989·Virchows Archiv. A, Pathological Anatomy and Histopathology·R E TracyC Reynolds
Jan 1, 1991·Journal of Biomedical Engineering·D EladS Einav

❮ Previous
Next ❯

Related Concepts

Related Feeds

Aneurysm

Aneurysms are outward distensions or bulges that occurs in a weakened wall of blood vessels. Discover the latest research on aneurysms here.

© 2021 Meta ULC. All rights reserved