Vehicular causation factors and conceptual design modifications to reduce aortic strain in numerically reconstructed real world nearside lateral automotive crashes

Aditya Belwadi and King H. Yang (Wayne State University)

CHALLENGE - Aortic Injury (AI) leading to disruption of the aorta is an uncommon but highly lethal consequence of high-speed impact trauma. This study aims to find an effective means of substantially improving the outcome of motor vehicle crash induced AI’s with the aid of FE vehicle models.

SOLUTION - To further understand the mechanism of aortic injury, a DOCE study was performed on 16 different combinations of five design factors generated using a Latin Square method in modeFRONTIER. The design factors considered were: impact height, impact position, PDOF and initial velocity of the bullet vehicle combined with varying occupant seating positions in the case vehicle, each with two to four levels of variations chosen from the proximity of CIREN data. ​The second version of the Wayne State Human Body Model was used for the testing procedure. 

BENEFITS - In simulated near side left lateral crashes, peak average maximum principal strain primarily occurred in the isthmus of the aorta. Results of design of computer experiments using modeFRONTIER concluded that occupant seating position, bumper profile height, and PDOF of impact play a crucial role in the generation of strain and pressure in the aorta, a potential injury mechanism responsible for traumatic rupture of the aorta in automobile crashes.