EEVC/WG10 proposed three component pedestrain subsystem tests. Euro-NCAP pedestrian tests have been conducted according to these procedures. The results from Euro-NCAP indicate that the upper legform impact test has the most difficulty fulfilling the current injury criteria. However, the number of severe injuries from impact against the bonnet leading edge has been decreasing recently. The objective of this research is to validate the test conditions and injury criteria of the EEVC upper legform impact test from accident analyses, impact tests with production cars and accident reconstruction tests. The top four factors affecting the injury risk of the femur/pelvis were the bonnet leading edge height, the pedestrian age, the vehicle registration year, and the bumper lead. The fracture of lower leg also affected the significance of the upper leg injury. The Weibull cumulative frequency curve was obtained as a biomechanical injury risk curve from accident reconstruction tests. At the 50 percentile injury risk level, 7.5 kN for impact force and 510 Nm for bending moment were obtained. The current injury criteria of 4 kN for impact force and 220 Nm for bending moment are too severe, It is necessary to reconsider the injury criteria and test conditions of the EEVC pedestrian upper legform impact test. (A)
Samenvatting