Optimization Study on Driver Lower Tibia Injury in MPDB

Pengpeng Han; Xinjiu Li; Ning He; Feifei Han

doi:10.54097/5fphty71

Authors

Pengpeng Han
Xinjiu Li
Ning He
Feifei Han

DOI:

https://doi.org/10.54097/5fphty71

Keywords:

Lower limb injury; foot support foam; optimization; MPDB condition.

Abstract

This study addresses the issue of excessive lower leg injury to the THOR dummy driver in a 50 km/h frontal 50% overlap rigid barrier collision (MPDB) for a specific vehicle model. A method to reduce lower limb injury by optimizing the foot support foam is proposed. Through simulation analysis, the effects of foam stiffness, installation angle, and other parameters on the axial force (Fz) and bending moment (My) of the lower leg are investigated. The results show that when ethylene-vinyl acetate (EVA) foam with a foaming rate of 30% and an installation angle of 45° is used, the axial force Fz of the lower leg decreases from 1.98 kN to 1.03 kN, and the tibia index (Ti) improves from 0.69 to 0.53. The lower leg score increases by 26.2%, meeting the C-NCAP target requirements. The optimization solution is validated through sled tests, demonstrating a significant reduction in lower leg biomechanical loads. This study provides a theoretical basis for the design of vehicle restraint systems.

Downloads

Download data is not yet available.

References

[1] Yang Chunzhong, Liu Cancan, Li Xiaodong, et al. Research on Driver Dummy Lower Leg Injury Under MPDB Conditions [C]. 2022 SAE-China Congress Proceedings. 2022.

[2] Han Feng, Ju Chunxian, Li Ning, et al. Research and Optimization of Occupant Lower Leg Injury Mechanism in Frontal Collision [J]. China Automotive, 2019(1):6.

[3] Pattimore D, Ward E, Thomas P, et al. The Nature and Cause of Lower Limb Injuries in Car Crashes [J]. SAE Technical Paper Series, 1996.

[4] Liu Zhenhai. Injury Assessment of Dummy Thigh in Frontal Collision [J]. Auto Engineer, 2012(10):39-43.

[5] Yang Jialin, Zhu Haitao, Zhang Xianglei. Research on Collision Severity and Occupant Injury in MPDB Tests [C]. 2020 SAE-China Congress Proceedings. Beijing: Mechanical Industry Press, 2020.

[6] Yang Shuai, Cheng Bao, Hou Yanjun. Research on Crash Compatibility Based on MPDB Condition [J]. Automobile Applied Technology, 2019(20):6.

[7] China Automotive Technology and Research Center Co., Ltd. C-NCAP Management Regulations (2021 Edition) [R]. Tianjin: CATARC, 2020.

[8] Zhu Haitao. Correlation Analysis of Driver Lower Leg Injuries [C]. SAE-China Congress Proceedings, 2007, Tianjin.

[9] SAE J2111 Instrumentation for Impact Test-Part 1-Electronic Instrumentation, REV.MAR95.

[10] Guo Qingxiang, Wang Taoying, Wang Nan. Analysis of Factors Affecting Dummy Lower Leg Injury in Frontal Collision [J]. Auto Engineer, 2015(1):6.