Development and evaluation of the advanced pedestrian legform impactor prototype which can be applicable to all types of vehicles regardless of bumper height:​ finite element model

Isshiki, Takahiro<sup>1</sup>; Konosu, Atsuhiro<sup>1</sup>; Takahashi, Yukou<sup>2</sup>

The flexible pedestrian legform impactor simulating only a lower limb of a pedestrian, therefore, cannot adequately simulate the bending load generated on a lower limb of pedestrians due to the lack of representation of the upper body in a collision with a vehicle, especially for which has a high‐bumper.

However, no one has developed an advanced pedestrian legform impactor (finite element model and/or actual test tool) which can be applicable to all types of vehicles regardless of the bumper height through quantitative validation process using well validated human full‐body finite element model and wide variety of low‐bumper and high‐bumper vehicles.

In this study, we developed an advanced pedestrian legform impactor prototype finite element model by improving specifications of the flexible pedestrian legform impactor finite element model as well as by adding a biofidelic simplified upper body part finite element model. Then, we evaluated its biofidelity by the comparison of injury measures between the advanced pedestrian legform impactor prototype finite element model and a well validated human full‐body finite element model quantitatively under the collisions with 18 types low‐bumper and 18 types high‐bumper simplified vehicles.

As a result, we confirmed its high biofidelity under the above conditions quantitatively.

Keywords: computer simulation, influences of the upper body, legform impactor, pedestrian protection test method

Year

Entry

2007

Issiki T, Konosu A, Tanahashi M. Development of an FE biofidelic flexible pedestrian leg-form impactor (Flex-GT-prototype) model. In: Proceedings of the 20th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 18-21, 2007; Lyon, France.

2015

Isshiki T, Konosu A, Takahashi Y. Analysis of the causes of differences in impact responses between a human lower limb and the flexible pedestrian legform impactor under low and high bumper vehicle impact situations. In: Proceedings of the 2015 International IRCOBI Conference on the Biomechanics of Injury. September 9-11, 2015; Lyon, France.401-413.

2011

Zander O, Gehring D-U, Leßmann P. Improved assessment methods of lower extremity injuries in vehicle-to-pedestrian accidents using impactor tests and full-scale dummy tests. In: Proceedings of the 22nd International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 13-16, 2011; Washington, DC.

2007

Konosu A, Issiki T, Tanahashi M, Suzuki H. Development of a biofidelic flexible pedestrian legform impactor type GT (Flex-GT). In: Proceedings of the 20th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 18-21, 2007; Lyon, France.