Comparison on rating methods for female dummy in NCAP frontal impact test

Lee, K. W.; Lim, Jung Min

doi:10.1007/s12239-014-0096-5

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…3 Most crash test programmes focused on the protection of front-seat occupants owing to their high occupancy. [4][5][6] In fact, for the Euro-NCAP and China-NCAP, including rear-seat occupants, the safety criteria for rear-seat occupants are not as comprehensive as those used for front-seat occupants. In this case, advanced safety technologies, including load-limiters, pre-tensioners and intelligent airbags, are used extensively in front-seat environments but less frequently in rear-seat environments.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of rear-seat restraint system based on new safety seat during frontal collisions

Hong

Liu

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Owing to the narrow rear-row space of compact cars, the head of a rear-seat occupant can easily hit against the headrest or the seatback of the front seat in frontal collisions, thereby causing injuries to the occupant. A prototype design of a new safety seat is proposed to increase the safety of rear-seat occupants. The aim of this study is to investigate the protective effects of the new safety seat and further optimise the rear-seat restraint system in 100% and 40% overlapped frontal collisions. First, a simulation model of the restraint system is developed and validated. Second, the effects of the original seat and the new safety seats with different torsional stiffness of the torsion spring on the injuries to a female rear-seat occupant are compared. Finally, the design parameters of the rear-seat restraint system are optimised globally to minimise injuries to the female rear-seat occupant. Compared with the original seat case, the head injury criterion HIC15 and thorax 3 ms resultant acceleration T3MS of the female rear-seat occupant in the new safety seat case reduce, whereas the neck injury criterion Nij increases. When the torsional stiffness of the torsion spring decreases gradually, HIC15 and T3MS decrease. The optimum torsional stiffness of the torsion spring determined via analysis is 10 N m/°. The optimal combination of the design parameters of the rear-seat restraint system is obtained. After optimisation, for the 100% overlapped collision, HIC15 and T3MS decrease by 40.20% and 5.75%, respectively, Nij decreases by 35.94% and the peak left and right femur forces ( FL and FR, respectively) decrease by 9.65% and 12.26%, respectively. For the 40% overlapped collision, HIC15 and T3MS reduce by 39.92% and 11.64%, respectively, and Nij, FL and FR decrease by 8.89%, 7.50% and 6.09%, respectively.

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Section: Introductionmentioning

confidence: 99%

Optimal design of rear-seat restraint system based on new safety seat during frontal collisions

Hong

Liu

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Gernot Woitch et al used digital dummy model to study the occupant injury under the work of active safety system in collision [3]. Lee K W et al analyzed the injury of 5 percentage female dummies in the co-pilot position during the frontal collision [4]. Domestic scholars have also done a lot of research in this field.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Occupant Grip on Ceiling Handrail and Injury Assessment in Collision

Xu¹,

Zhang²,

Ma³

et al. 2021

International Journal of Scientific Advances

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With the rapid increase in the number of cars, to bring a variety of convenience to mankind, at the same time, a number of traffic safety problems also followed, which causing serious injuries and property losses, bring more pain and regret to the people. Therefore, to accurately assess the damage of the personnel in the collision safety accident is very useful to improve the safety performance and functionality of the vehicle. so, the crash dummy plays an important role in the research of crash safety. At present, in the study of human body injury in the collision with dummy, the influence of roof handrails grasping state was not considered. Therefore, the software of LS-PREPOST and Oasys PRIM-ER are used to build model of automobile cockpit and dummy with hand grip ability, the acceleration environment of frontal crash was simulated by adding B-pillar acceleration curve from real vehicle crash test. Comparing injuries of dummies in free sitting posture and holding the roof armrest in collision. he simulation results show that when the dummy was grasping the roof armrest, the peak value of head acceleration and HIC values were 6.1% and 30.2% lower than the dummy was sitting freely, the maximum value of shear force, tensile force and bending moment of the neck were reduced by 87.4%, 76.9% and 42.9% respectively, and the maximum value of chest compression was reduced by 16.9%. The results provide a reference for the research of passive safety in collision.

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A Study On Optimal Design of Longitudinal Shape For Improving Small-Overlap Performance

Lưu

Anh

2021

Lecture Notes in Mechanical Engineering

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Comparison on rating methods for female dummy in NCAP frontal impact test

Cited by 6 publications

References 2 publications

Optimal design of rear-seat restraint system based on new safety seat during frontal collisions

Optimal design of rear-seat restraint system based on new safety seat during frontal collisions

The Influence of Occupant Grip on Ceiling Handrail and Injury Assessment in Collision

A Study On Optimal Design of Longitudinal Shape For Improving Small-Overlap Performance

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