车辆碰撞中乘员骨盆力学响应特性的研究*

doi:10.19562/j.chinasae.qcgc.2020.04.008

Abstract

Abstract: The mechanism of occupant pelvis injury and the effects of age on its impact response are studied in this paper. Firstly the finite element model for the elder pelvis is developed and verified. Then, three pelvis models with different age characteristics (elder pelvis model, middle-aged pelvis model GHBMC and child pelvis model CHARM-10) are used to compare their differences in material properties, physiological characteristics, mechanical response and impact injury. The results show that the elder and middle-aged pelvis models have similar physiological geometry, but they are quite different from the child pelvis model. The results of side impact experiment indicate that among three pelvis models for different ages, the elder pelvis model has the largest peak impact force and deflection at maximum force, but has the smallest deflection under impact. According to the fitting of impact response data, with the rise of impact energy, the peak impact force exhibits an exponential increase while the maximum deflection shows a linear increase for all three pelvis models of different ages. Finally the results of analysis on stress nephogram indicate that the parts of pelvis prone to injury and fracture are ischio-pubic rami, iliac-sacral junction and acetabulum

Key words: pelvis model, mechanical response, fracture

Wu Hequan, Hou Haibin, Hu Lin. Study on Mechanical Response Characteristicsof Occupant Pelvis in Vehicle Crash[J].Automotive Engineering, 2020, 42(4): 468-476.

References

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Study on Mechanical Response Characteristicsof Occupant Pelvis in Vehicle Crash

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