Int. J. of Vehicle Safety   »   2017 Vol.9, No.4

 

 

Title: Thoracoabdominal injury analysis of a 6-year-old pedestrian finite element model in vehicle-pedestrian collisions

 

Authors: Wenle Lv; June Ruan; Haiyan Li; Shihai Cui; Lijuan He; Shijie Ruan

 

Addresses:
Center for Injury Biomechanics and Vehicle Safety, Tianjin University of Science and Technology, Tianjin 30022, China
University of Michigan, Ann Arbor, MI 48109, USA
Center for Injury Biomechanics and Vehicle Safety, Tianjin University of Science and Technology, Tianjin 30022, China
Center for Injury Biomechanics and Vehicle Safety, Tianjin University of Science and Technology, Tianjin 30022, China
Center for Injury Biomechanics and Vehicle Safety, Tianjin University of Science and Technology, Tianjin 30022, China
Center for Injury Biomechanics and Vehicle Safety, Tianjin University of Science and Technology, Tianjin 30022, China

 

Abstract: A holistic human body finite element model of a 6-year-old pedestrian was completed by integrating the skin, soft tissues and joint ligaments, based on the component models of a 6-year-old child. The complete model was verified by comparing to available cadaveric test data. Then it was used to simulate collisions of midsize car/SUV-paediatric pedestrian at different collision speeds, in order to study the effects of collision speed, and vehicle type on kinematic/biomechanical responses of paediatric chest and abdomen, and to predict the injuries of bones and internal organs according to compression/viscous criterion and strain. Simulation results showed that the number of rib fractures increased with the increase of collision speed in collision simulations of midsize car-paediatric pedestrian, but no rib fracture appeared in simulations of SUV-paediatric pedestrian impact. Maximum values of chest/abdomen/thigh impact forces, maximum deformation/VCmax of paediatric chest and abdomen, and maximum first principal strain of internal organs were proportional to collision speed. Predicted paediatric chest and abdominal injuries, obtained from the midsize car-pedestrian simulations, were found to be consistent when compression/viscous criterion and first principal strain were used as a yardstick for injury assessment. Additionally, compression/viscous criteria had some limitations on the prediction of rib fracture in SUV-pedestrian collision simulations.

 

Keywords: paediatric pedestrian; thoracoabdominal injury; finite element model; injury biomechanics.

 

DOI: 10.1504/IJVS.2017.10008209

 

Int. J. of Vehicle Safety, 2017 Vol.9, No.4, pp.279 - 297

 

Submission date: 28 Sep 2016
Date of acceptance: 17 Jan 2017
Available online: 03 Oct 2017

 

 

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