The aorta is the largest artery of the human body, and it is considered in the continuous medium mechanics as a hyperelastic material for its biological properties. The thoracic aorta is directly affected in vehicular collision events by compression generated between the ribcage and the three-point seatbelt tension producing injuries in the artery wall. A three-dimensional model of the thoracic aorta was constructed from digital tomographic images considering the ascending aorta, the aortic arch, and the descending aorta. The model obtained presents acceptable characteristics such as a length of 222.8 mm and an ascending aortic diameter of 22.7 mm, 22.7 mm in the aortic arch, and 16.09 mm in the descending aorta. A 150 ms time numerical simulation was developed through the finite element method (MEF), and the model was analyzed simulating a compression load on the artery at its front location. Boundary conditions were considered by selecting specific nodes in the model, such as the points where the artery is held in the thorax with other elements. In addition, displacement nodes were considered to establish a natural behavior of the artery. The outcomes show significant displacements in the artery wall. The most affected areas are the aortic arch and descending aorta, whose displacements reach 14 mm from their original position. Based on the abbreviated injury scale (AIS), the degree of injury to the aorta in this collision event is estimated, an AIS 2 with a moderate severity index and required medical attention.

中文翻译：

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正面撞击期间的主动脉钝器创伤分析

主动脉是人体最大的动脉，因其生物学特性在连续介质力学中被认为是一种超弹性材料。在车辆碰撞事件中，胸主动脉直接受到胸腔和三点式安全带张力之间产生的压缩影响，从而导致动脉壁受伤。考虑升主动脉、主动脉弓和降主动脉，从数字断层图像构建胸主动脉的三维模型。获得的模型呈现出可接受的特征，例如长度为 222.8 毫米，升主动脉直径为 22.7 毫米，主动脉弓为 22.7 毫米，降主动脉为 16.09 毫米。通过有限元方法 (MEF) 开发了 150 ms 时间的数值模拟，并通过模拟动脉前部位置的压缩载荷对模型进行分析。通过选择模型中的特定节点来考虑边界条件，例如动脉与其他元素保持在胸腔中的点。此外，位移节点被认为是建立动脉的自然行为。结果显示动脉壁发生显着位移。受影响最严重的区域是主动脉弓和降主动脉，它们的位移从原始位置达到 14 毫米。根据缩写伤害量表 (AIS)，估计这次碰撞事件中主动脉的损伤程度，AIS 2 具有中等严重程度指数和需要的医疗护理。例如动脉与其他元素保持在胸腔中的点。此外，位移节点被认为是建立动脉的自然行为。结果显示动脉壁发生显着位移。受影响最严重的区域是主动脉弓和降主动脉，它们的位移从原始位置达到 14 毫米。根据缩写伤害量表 (AIS)，估计这次碰撞事件中主动脉的损伤程度，AIS 2 具有中等严重程度指数和需要的医疗护理。例如动脉与其他元素保持在胸腔中的点。此外，位移节点被认为是建立动脉的自然行为。结果显示动脉壁发生显着位移。受影响最严重的区域是主动脉弓和降主动脉，它们的位移从原始位置达到 14 毫米。根据缩写伤害量表 (AIS)，估计这次碰撞事件中主动脉的损伤程度，AIS 2 具有中等严重程度指数和需要的医疗护理。其位移从其原始位置达到 14 mm。根据缩写伤害量表 (AIS)，估计这次碰撞事件中主动脉的损伤程度，AIS 2 具有中等严重程度指数和需要的医疗护理。其位移从其原始位置达到 14 mm。根据缩写伤害量表 (AIS)，估计这次碰撞事件中主动脉的损伤程度，AIS 2 具有中等严重程度指数和需要的医疗护理。