Development and Validation of an Occupant Biomechanical Model for the Aortic Injury Analysis under Side Impacts

Ma, Zaitian; Jing, Lele; Lianbo, Jiang

doi:10.1051/matecconf/201925601001

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…Finally, a viscoelastic fractional model applying MEF has been used to create numerical simulations dividing the artery wall into its 3 layers: the intima, the media, and the adventitia. The layer's behavior determines the distribution of stresses and the deformation in the artery under the Von Mises criteria [17].…”

Section: Introductionmentioning

confidence: 99%

Aortic Blunt Trauma Analysis during a Frontal Impact

Grave-Capistrán

Prieto-Vázquez

Miguel

2021

Applied Bionics and Biomechanics

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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.

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Section: Introductionmentioning

confidence: 99%

Aortic Blunt Trauma Analysis during a Frontal Impact

Grave-Capistrán

Prieto-Vázquez

Miguel

2021

Applied Bionics and Biomechanics

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Comparison of Different Material Constitutive Models for Predicting Aortic Biomechanical Response and Injury in Blunt Side Impacts

MA,

CHEN,

2024

J. Mech. Med. Biol.

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Traumatic rupture of the aorta (TRA) is highly lethal in motor vehicle collisions (MVCs). Human body biomechanical models (HUBMs) show promise as useful tools for better comprehension of the mechanical response and injury mechanism of TRA. However, the prediction accuracy largely depends on its material modeling. This study investigated the performance of the isotropic elastic material constitutive model (Mat_001) and the orthotropic elastic material constitutive model (Mat_002) for predicting aortic dynamic response and injury in blunt side impacts, via simulations against vertical and oblique side impact cadaver tests with previously developed HUBM. The aortic strain response, peak intraluminal pressure, thoracic deflections and injury distributions were compared. It was found that both Mat_001 and Mat_002 could be used to model aortic tissue, but Mat_002 presented more sensitivity to blunt side impacts in terms of strain responses. The thoracic rib cage and internal organs sustained more severe injuries under the oblique left side impact (AIS 5+) than those under the vertical left side impact (AIS 4+), whereas the aortic peri-isthmus exhibited a higher TRA risk in the vertical side impact than that in the oblique side impact, with regard to the peak longitudinal strain. The TRA could result from the aorta’s sudden stretch, and the peak longitudinal strain could be regarded as a main contributing factor to it. This study enhances our understanding of the aortic material modeling and injury mechanisms.

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Development and Validation of an Occupant Biomechanical Model for the Aortic Injury Analysis under Side Impacts

Cited by 2 publications

References 18 publications

Aortic Blunt Trauma Analysis during a Frontal Impact

Aortic Blunt Trauma Analysis during a Frontal Impact

Comparison of Different Material Constitutive Models for Predicting Aortic Biomechanical Response and Injury in Blunt Side Impacts

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