대동맥 외상 파열 원리에 관련한 유한 요소의 재건 및 시뮬레이션

Abstract

Traumatic rupture of the aorta (TRA) has become one of the global leading causes of death in car accidents, brings lots of harm and loss. The fatality rate is very high without emergency treatment in time and that as well in a partial rupture of the Aorta. A complete rupture of Aortic wall is instantly fatal at the scene of accident. Although most researchers regard it as deceleration injury, the exact detailed mechanism of TRA still remains unidentified. This research aims at accurate modeling of the chest and further investigating the mechanism of TRA using finite element (FE) simulations. The model includes rib cage, thoracic Aorta vessel, lungs and heart which were made by medical imaging reconstruction software named MIMICS. The simulation performed by the software ANSYS to observe the aortic behavior in the thoracic interior after car crashes happen. The FE simulation shows that with the incremental initial velocity rising from 1 to 5 m/s, the maximum stress range of aorta was from 1.1026 to 6.7002 MPa and the maximum strain range of aorta was from 0.0528 to 0.3083. All the peak values occurred at isthmus region of the aorta. The analysis of result is hoped to predict internal kinematics of the aorta and help to better understand the injury mechanism of TRA. The model will also contribute to the design of safety protections.