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research-article

A Finite Element Model of a mid-size male for simulating pedestrian accidents

[+] Author and Article Information
Costin D. Untaroiu

Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, USA
costin@vt.edu

Wansoo Pak

Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, USA
wspak@vt.edu

Yunzhu Meng

Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, USA
mengyz@vt.edu

Jeremy M. Schap

Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA
jschap@wakehealth.edu

Bharath Koya

Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA
bkoya@wakehealth.edu

F. Scott Gayzik

Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA
sgayzik@wakehealth.edu

1Corresponding author.

ASME doi:10.1115/1.4037854 History: Received February 09, 2017; Revised August 31, 2017

Abstract

Pedestrians represent one of the most vulnerable road users and comprise nearly 22% the road crash related fatalities in the world. Therefore, protection of pedestrians in car-to-pedestrian collisions (CPC) has recently generated increased attention with regulations involving three subsystem tests. The development of a finite element (FE) pedestrian model could provide a complementary component that characterizes the whole-body response of vehicle-pedestrian interactions and assesses the pedestrian injuries. The main goal of this study was to develop and to validate a simplified full body FE model corresponding to a 50th male pedestrian in standing posture (M50-PS). The FE model mesh and defined material properties are based on a 50th percentile male occupant model. The lower limb-pelvis and lumbar spine regions of the human model were validated against the post-mortem human surrogate (PMHS) test data recorded in four-point lateral knee bending tests, pelvic\abdomen\shoulder\thoracic impact tests, and lumbar spine bending tests. Then, a pedestrian-to-vehicle impact simulation was performed using the whole pedestrian model and the results were compared to corresponding PMHS tests. Overall, the simulation results showed that lower leg response is mostly within boundaries of PMHS corridors. In addition, the model shows the capability to predict the most common lower extremity injuries observed in pedestrian accidents. Generally, the validated pedestrian model may be used by safety researchers in the design of front ends of new vehicles in order to increase pedestrian protection.

Copyright (c) 2017 by ASME
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