Biofidelity evaluation for the knee and leg of the polar pedestrian dummy

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Takahashi, Yukou¹; Kikuchi, Yuji²; Okamoto, Masayoshi²; Akiyama, Akihiko²; Ivarsson, Johan³; Bose, Dipan³; Subit, Damien³; Shin, JaeHo³; Crandall, Jeff³

Biofidelity evaluation for the knee and leg of the polar pedestrian dummy

Proceedings of the 19th International Technical Conference on the Enhanced Safety of Vehicles (ESV)

Affiliations

¹Honda R&D Americas, Inc., United States

²Honda R&D Co., Ltd., Japan

³University of Virginia, United States
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.
Links

URL: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv19/05-0280-O.pdf

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Year	Entry
2003	Okamoto M, Takahashi Y, Mori F, Hitosugi M, Madeley J, Ivarsson J, Crandall JR. Development of finite element model for child pedestrian protection. In: Proceedings of the 18th International Technical Conference on the Enhanced Safety of Vehicles (ESV). May 19-22, 2003; Nagoya, Japan.
2005	Crandall J, Wiley K, Longhitano D, Akiyama A. Development of performance specifications for a pedestrian research dummy. In: Proceedings of the 19th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 6-9, 2005; Washington, DC.
2007	Untaroiu C, Shin J, Ivarsson J, Crandall J, Takahashi Y, Akiyama A, Kikuchi Y. Pedestrian kinematics investigation with finite element dummy models based on anthropometry scaling method. In: Proceedings of the 20th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 18-21, 2007; Lyon, France.
2009	Untaroiu C, Shin J, Crandall J, Fredriksson R, Bostrom O, Takahashi Y, Akiyama A, Okamoto M, Kikuchi Y. Development and validation of pedestrian sedan bucks using finite element simulations: application in study the influence of vehicle automatic braking on the kinematics of the pedestrian involved in vehicle collisions. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.
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2020	Albert DL. A comparison of two versions of the biofidelity ranking system (BioRank): implications on THOR-50M and THOR-05F biofidelity evaluations. In: Proceedings of the 2020 International IRCOBI Conference on the Biomechanics of Injury. 2020; Munich, Germany.659-678.
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2010	Untaroiu CD, Shin J, Crandall JR, Fredriksson R, Bostrom O, Takahashi Y, Akiyama A, Okamoto M, Kikuchi Y. Development and validation of pedestrian sedan bucks using finite-element simulations: a numerical investigation of the influence of vehicle automatic braking on the kinematics of the pedestrian involved in vehicle collisions. Int J Crashworthiness. 2010;15(5):491-450.
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