Abstract:

A finite element model of two colliding sports utility vehicle (SUV) cars of same type was developed to evaluate the crashworthiness of passenger car in small overlap frontal oblique impact accident by using HyperWorks and LS-DYNA software. Through simulating several impact conditions of 25% overlap, the influences of collision angle and velocity on the crashworthiness of two car bodies were analyzed in terms of three important evaluation indexes i.e. maximum acceleration at the bottom of B-pillar, maximum bending angle on the upper part of A-pillar and dash panel intrusion. The results show as follows: In a 0° ~ 45° small overlap
frontal oblique impact, this type of car had its worst crashworthiness when it was collided as an inserted highspeed car by an inserting high-speed car at 0° ~ 15°; and with the increase of relative collision velocity of two cars, its crashworthiness deteriorated sharply. So the condition can be chosen for the pointed optimizing design to the car body.