Injury characteristics and protection of driver's tibia caused by accelerator pedal mounted on floor in frontal offset collision

doi:10.3969/j.issn.1674-8484.2024.01.004

Abstract

Abstract:

The driver's femur and tibia injury characteristics from the accelerator pedal mounted on floor in Euro NCAP frontal offset crash were investigated with formulating corresponding femur and tibia protection strategy. Including analyzing the characteristics of the foot kinematics and the injury curves during crash test for two kinds of vehicles equipped respectively with a body front panel and a floor mounted accelerator pedal on a same platform. An advanced strategy of femur and tibia protection was proposed by using tests and finite element simulation analysis, and was verified in the vehicle crash test. The results show that the tibia injury for the accelerator pedal on body front panel generates mainly in the lower tibia with the high bending moment in X direction caused by foot outward rotation; The injuries of the floor mounted accelerator pedal are small, which occurred in the upper tibia and femur with a high bending moment in Y direction and knee slider displacement caused by the impact of the tibia on the dashboard. By using the advanced strategy, the knee slider is improved by 72.2% with an upper tibia index (TI) of 48.6% compared to the strategy before optimization, while the knee slider displacement (D_S) is improved by 11.5% with an upper tibia index of 25% compared to the stages of vehicle mounted accelerator pedal on body front panel.

Key words: vehicle passive safety, frontal offset collision, accelerator pedal, tibia injury, femur injury

CLC Number:

U467.1

KANG Wei, WANG Gang, JU Chunxian, WANG Yu, GUO Jianbao. Injury characteristics and protection of driver's tibia caused by accelerator pedal mounted on floor in frontal offset collision[J]. Journal of Automotive Safety and Energy, 2024, 15(1): 39-46.

Figures/Tables 18

References 12

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评价	限值	车型A		车型B
评价	限值	伤害	得分	伤害	得分
右大腿力	3.8~9.07 kN	1.4 kN	4.00	1.2 kN	4.00
右膝滑移	6~15 mm	2.6 mm	4.00	8.3 mm	2.98
小腿右上TI	0.4~1.3	0.38	4.00	0.76	2.40
小腿右下TI	0.4~1.3	0.52	3.47	0.27	4.00
小腿右上F_Z	2~8 kN	1.40 kN	4.00	1.89 kN	4.00
小腿右下F_Z	2~8 kN	1.62 kN	4.00	2.40 kN	3.73

评价	限值	车型A		车型B
评价	限值	伤害	得分	伤害	得分
右大腿力	3.8~9.07 kN	1.4 kN	4.00	1.2 kN	4.00
右膝滑移	6~15 mm	2.6 mm	4.00	8.3 mm	2.98
小腿右上TI	0.4~1.3	0.38	4.00	0.76	2.40
小腿右下TI	0.4~1.3	0.52	3.47	0.27	4.00
小腿右上F_Z	2~8 kN	1.40 kN	4.00	1.89 kN	4.00
小腿右下F_Z	2~8 kN	1.62 kN	4.00	2.40 kN	3.73

	大腿	小腿
	D_S / mm	M_Y / Nm	TI
整车试验	8.30	168	0.76
仿真对标	7.13	156	0.70
方案1	5.70	136	0.63
方案2	5.50	132	0.60
方案3	1.70	63	0.33

	大腿	小腿
	D_S / mm	M_Y / Nm	TI
整车试验	8.30	168	0.76
仿真对标	7.13	156	0.70
方案1	5.70	136	0.63
方案2	5.50	132	0.60
方案3	1.70	63	0.33

	大腿	小腿
	D_S / mm	M_Y / Nm	TI
整车试验优化前	8.3	168	0.76
整车验证优化后	2.3	82	0.39