Development of a pedestrian pelvis impactor CAE model with potential to address pelvis injury loads and injury mechanisms

Isshiki, Takahiro; Higuchi, Yu-ki; Kato, Ryousuke; Antona-Makoshi, Jacobo; Konosu, Atsuhiro; Takahashi, Yukou

Affiliations

¹Japan Automobile Research Institute, Tsukuba, Japan

²Pedestrian Safety Experts Group at the Japan Automobile Manufacturers Association, Inc., Tokyo, Japan

Abstract and keywords

This study aimed to clarify the feasibility to develop a biofidelic Pedestrian Pelvis Impactor (PPI) CAE model with the potential to address detailed pelvic loading and injury mechanisms. First, three simplified car front-end models (Sedan, SUV with a low/high bonnet leading edge) were applied to simulate impacts at different locations along the thigh of a biofidelic 50th percentile male human body model (HBM). Based on these simulations, the loads and the stresses sustained by the pelvis were analysed, and the pelvic ring and the ilium on the struck side were identified as the minimum structural elements required to represent the pelvic loading condition adequately. Based on the analysis, a PPI CAE model that incorporated the assumed structural simplifications was developed. In order to enable a biofidelity evaluation of the PPI model, the model was complemented with the lower limb and the pelvis flesh at the struck side from the HBM. Both the complemented PPI model and the complete HBM were subjected to a variety of simulated impacts with 36 simplified car front-end models (18 Sedan and 18 SUVs). The PPI model response highly correlated with the HBM response in terms of peak pelvis injury measures except for sacroiliac force.

Keywords: Impactor pedestrian safety; pelvis injury

Links

URL: http://www.ircobi.org/wordpress/downloads/irc19/pdf-files/71.pdf

Cited Works (8)

Year	Entry
2012	Gunji Y, Okamoto M, Takahashi Y. Examination of human body mass influence on pedestrian pelvis injury prediction using a human FE model. In: Proceedings of the 2012 International IRCOBI Conference on the Biomechanics of Injury. September 12-14, 2012; Dublin, Ireland.316-327.
2006	Kikuchi Y, Takahashi Y, Mori F. Development of a finite element model for a pedestrian pelvis and lower limb. In: Proceedings of the SAE World Congress & Exhibition. April 3-6, 2006; Detroit, MI. Warrendale, PA: Society of Automotive Engineers. SAE 2006-01-0683.
2016	Isshiki T, Konosu A, Takahashi Y. 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. In: Proceedings of the 2016 International IRCOBI Conference on the Biomechanics of Injury. September 14-16, 2016; Malaga, Spain.770-784.
2018	Isshiki T, Antona‐Makoshi J, Konosu A, Takahashi Y. Consolidated technical specifications for the advanced pedestrian legform impactor (aPLI). In: Proceedings of the 2018 International IRCOBI Conference on the Biomechanics of Injury. September 12-14, 2018; Athens, Greece.284-301.
2005	Mizuno Y. Summary of IHRA pedestrian safety WG activities (2005): proposed test methods to evaluate pedestrian protection afforded by passenger cars. In: Proceedings of the 19th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 6-9, 2005; Washington, DC.
2010	Takahashi Y, Suzuki S, Ikeda M, Gunji Y. Investigation on pedestrian pelvis loading mechanisms using finite element simulations. In: Proceedings of the 2010 International IRCOBI Conference on the Biomechanics of Impact. September 15-17, 2010; Hannover, Germany.169-180.
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Cited By (3)

Year	Entry
2020	Saadé J, Cuny S, Labrousse M, Song E, Chauvel C, Chrétien P. Pedestrian injuries and vehicles-related risk factors in car-to-pedestrian frontal collisions. In: Proceedings of the 2020 International IRCOBI Conference on the Biomechanics of Injury. 2020; Munich, Germany.278-288.
2021	Higuchi Y-k, Isshiki T, Antona-Makoshi J, Sato F, Konosu A, Takahashi Y. Investigation of the effect of non-struck-side lower limb on pelvic kinematics for the development of pedestrian pelvis impactor. In: Proceedings of the 2021 International IRCOBI Conference on the Biomechanics of Injury. September 8-10, 2021; Online.81-82.
2024	Asadi M, Bell C, Takahashi Y. Optimisation of a new pedestrian pelvis impactor. In: Proceedings of the 2024 International IRCOBI Conference on the Biomechanics of Injury. September 11-13, 2024; Stockholm, Sweden.1213-1214.