Comparison of kinematic behaviour of a first generation obese dummy and obese PMHS in frontal sled tests

Joodaki, Hamed<sup>1,2</sup>; Forman, Jason<sup>1</sup>; Forghani, Ali<sup>1</sup>; Overby, Brian<sup>1</sup>; Kent, Richard<sup>1,2</sup>; Crandall, Jeff<sup>1,2</sup>; Beahlen, Breanna<sup>3</sup>; Beebe, Mike<sup>3</sup>; Bostrom, Ola<sup>4</sup>

Affiliations

¹Center for Applied Biomechanics (CAB), USA,

²Mechanical Engineering Department of University of Virginia (UVA), USA

³Humanetics Innovative Solutions Incorporation, USA

⁴Integrated Safety Director of Autoliv Research, Sweden

Abstract and keywords

The purpose of this study is to evaluate a First Generation Obese Anthropometric test device (FGOA), comparing its kinematic behaviour with two obese Post Mortem Human Surrogates (PMHS) in matching frontal impact sled tests.

The FGOA was built around an existing 50th percentile THOR male crash test dummy’s skeletal structure, but with unique flesh and additional mass added to the upper and lower torso and upper legs. Two 29 km/h PMHS tests, two 48 km/h PMHS tests, two 29 km/h dummy tests, and two 48 km/h dummy tests were performed with a sled buck representing the rear seat occupant component of a 2004 mid‐sized sedan.

The FGOA and PMHS exhibited similar kinematic characteristics, which have been highlighted previously as potentially challenging for restraint systems design. Most notably, both the PMHS and dummy exhibited substantial forward motion of lower body and subsequent backwards rotation of the torso, affected by limited engagement of the lap‐belt with the pelvis. Although some differences suggest that further refinement may be warranted, the similarities suggest that this dummy may prove useful as a research tool to begin investigating the challenges of, and potential strategies for, the safe restraint of obese occupants.

Keywords: obese dummy, obesity, frontal impact, biofidelity, dummy development

Links

URL: http://ircobi.org/downloads/irc15/pdf_files/57.pdf

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Cited By (4)

Year	Entry
2017	Kitagawa Y, Hayashi S, Yasuki T. Comparison of impact kinematics between non‐obese and obese occupants in frontal and lateral impacts. In: Proceedings of the 2017 International IRCOBI Conference on the Biomechanics of Injury. September 13-15, 2017; Antwerp, Belgium.91-103.
2018	Gepner BD, Joodaki H, Sun Z, Jayathirtha M, Kim T, Forman JL, Kerrigan JR. Performance of the obese GHBMC models in the sled and belt pull test conditions. In: Proceedings of the 2018 International IRCOBI Conference on the Biomechanics of Injury. September 12-14, 2018; Athens, Greece.355-368.
2023	Schäuble A, Zippel F, Rücker P, Kinsky T. Impact kinematics and dynamics of an obese ATD in comparison with an elderly female, the HIII 50th male and the HIII 5th female ATDs as drivers and front passengers in full-width frontal impacts. In: Proceedings of the 2023 International IRCOBI Conference on the Biomechanics of Injury. September 13-165, 2023; Cambridge, United Kingdom.285-30.
2020	Sun Z, Gepner BD, Lee S-H, Rigby J, Singh N, Kerrigan JR. Determination of strain rate in modelling belt-flesh-pelvis interaction during frontal crashes. In: Proceedings of the 2020 International IRCOBI Asia Conference on the Biomechanics of Injury. 2020; Beijing, China.130-133.