Abstract:

Flexible legform impactor (Flex-PLI) impact tests were done for a type of vehicle base on the
European New Car Assessment Program (Euro-NCAP) to reduce the impact injure onto pedestrian lower
legform. The key factors influencing the tibia injury and knee injury were analyzed based on the scores by
the Euro-NCAP assessment. The results show that vehicle front contact with tibia position stiffness has a
great influence on bending moment, and knee ligament elongation is associated with upper and lower relative
motion of knee joint. So that, the front-end structure design should avoid tibia bending moment being exceed
the standard caused by the great stiffness of vehicle front structure; and the design should adjust the knee
when upper and lower amount of intrusion to improve knee ligament elongation. These conclusions will provide
practice in front-end structure design for new vehicles.