The development of the lower extremity of a human FE model and the influence of anatomical detailed modelling in vehicle‐to‐pedestrian impacts

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Kunitomi, Shouhei¹; Yamamoto, Yoshihiro¹; Kato, Ryosuke¹; Antona‐Makoshi, Jacobo¹; Konosu, Atsuhiro¹; Dokko, Yasuhiro²; Yasuki, Tsuyoshi²

The development of the lower extremity of a human FE model and the influence of anatomical detailed modelling in vehicle‐to‐pedestrian impacts

Proceedings of the 2017 International IRCOBI Conference on the Biomechanics of Injury

Affiliations

¹Japan Automobile Research Institute (JARI) in Tsukuba, Japan

²Japan Automobile Manufacturers Association, Inc. (JAMA) in Tokyo, Japan
Abstract and keywords

The goal of this study was to develop and validate a 50th percentile male pedestrian finite element model on a component‐to‐full scale and to clarify the influence of anatomical details in human modelling on the impacted body response and injury patterns. First, we developed a 50th percentile male Japan Automobile Manufacturers Association pedestrian model including anatomical detail, especially for the lower extremities using CT/MRI data, then we validated the model at the component/sub‐assembly levels as well as the full‐scale level using available post‐mortem human subject impact test data. As a result, we were able to develop a highly biofidelic Japan Automobile Manufacturers Association pedestrian finite element model which can precisely predict post‐mortem human subject injury patterns of the lower extremities under various impact conditions. Furthermore, focusing on the effectiveness of anatomical detailed modelling for the pelvis and knees, such as in the model developed in this study, the authors examined the influence of the modelling against body response as well as injury patterns. As a result, we found that the pelvis cortical bone thickness has a significant influence on the force deflection response as well as injury patterns of the pelvis. Furthermore, we clarified that detailed knee ligament modelling improves knee ligament injury patterns under pedestrian full‐scale impact conditions.

Keywords:
Links

URL: http://www.ircobi.org/wordpress/downloads/irc17/pdf-files/62.pdf

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2022	Brynskog E, Iraeus J, Pipkorn B, Davidsson J. Population variance in pelvic response to lateral impacts: a global sensitivity analysis. In: Proceedings of the 2022 International IRCOBI Conference on the Biomechanics of Injury. September 14-16, 2022; Porto, Portugal.173-196.
2020	Albert DL. Variations in user implementation of the CORA rating metric. Stapp Car Crash J. November 2020;64:1-30.
2023	Grindle DM. Protection of Standing and Seated Pedestrians Using Finite Element Analysis [PhD thesis]. Virginia Polytechnic Institute and State University; April 27, 2023.