Citation

Takahashi Y, Kikuchi Y, Okamoto M, Akiyama A, Ivarsson J, Bose D, Subit D, Shin JH, Crandall JR. Proc. Int. Tech. Conf. Enhanced Safety Vehicles 2005; 2005: 13p.

Copyright

(Copyright © 2005, In public domain, Publisher National Highway Traffic Safety Administration)

DOI

unavailable

PMID

unavailable

Abstract

Biofidelity of the Polar-II pedestrian dummy lower extremity was assessed in a series of dynamic bending tests relative to published PMHS (Post Mortem Human Subject) response corridors. Dynamic 4-point lateral bending tests of the knee joint and dynamic 3-point lateral bending tests of the leg from the original version of the Polar-II dummy were performed under identical test conditions to the published PMHS tests that simulated car-pedestrian lower limb impact at 40 km/h. Although the force-deflection and moment-deflection responses of the leg were found to be biofidelic, the knee joint test results showed that the stiffness in lateral bending needed to be increased. Based on the test results, a modified version of the knee joint was designed and fabricated with increased lateral bending stiffness to improve response biofidelity. The modified knee joint was evaluated in the dynamic 4-point lateral bending test, and the test results were compared with the same human response corridors. It was found that the moment-angle response of the modified knee joint in valgus bending was significantly closer to those of human subjects compared to the original version.