Study on the Effect of Age on the Lower Extremity Injury of Pedestrians

doi:10.3901/JME.2020.02.106

Abstract

Abstract: In the accident of pedestrian collision, the lower limb is the main injured part. In order to improve the protection of pedestrians, the finite element model of pedestrian lower limbs with age difference is used to analyze the difference of pedestrian lower limb injury. According to the real pedestrian accident case from the China in-depth accident study(CIDAS) database, the PC-Crash software was used to reconstruct the accident, and the load and boundary conditions were set for the finite element model of the vehicle and pedestrian lower limb based on the output parameters of the accident reconstruction. By simulating the collision between the lower limbs and the sedan model, the differences between the young and the old groups were compared. The results discussed the shear displacement, bending angle, and the tensile force of the ligament and the bending moment and shear force of the long bone and further correlations between these injury parameters and severe AIS3+ injury were analyzed by logistic regression. Finally, the severe injury risk curves of young and old groups were obtained. The results showed that there was a difference in the risk of injury between the young group and the elderly group. When the probability of severe injury of AIS3+ was 50%, the damage threshold and tolerance limit of the long bone and kNee joint of the young group and the old group were obtained. The results of the study can provide a reference for the setting of age-related pedestrian lower limb injury assessment indicators.

Key words: car-pedestrian, age, lower limb injury, accident reconstruction, finite element, logistic regression

CLC Number:

U461

HU Lin, CHEN Kai, HUANG Jing, LIN Miao. Study on the Effect of Age on the Lower Extremity Injury of Pedestrians[J]. Journal of Mechanical Engineering, 2020, 56(2): 106-120.

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