Flex-PLI Application to High-Bumper Vehicles - Optimization of Supplemental Weight

Paper #:
  • 2013-01-0215

Published:
  • 2013-04-08
Citation:
Kawabe, Y., Pal, C., Okuyama, H., and Okabe, T., "Flex-PLI Application to High-Bumper Vehicles - Optimization of Supplemental Weight," SAE Int. J. Trans. Safety 1(2):278-285, 2013, https://doi.org/10.4271/2013-01-0215.
Pages:
8
Abstract:
The Flexible Pedestrian Legform Impactor (Flex-PLI) was developed to evaluate the risk of pedestrian lower extremity injuries. However, it has been pointed out that the post-crash kinematics of the Flex-PLI differs from those of a human body when it is hit by high-bumper vehicles. This paper describes the feasibility of applying the Flex-PLI to a wide range of vehicle types by adding a supplemental weight. The following aspects are discussed in this regard: A human body finite element (FE) model analysis shows that the upper body of the Flex-PLI is not involved in tibia and knee ligament injury indexes in the first contact with a high-bumper vehicle.A rigid bar model is introduced and its rotational energy ratio is formulated. The rotational energy ratio is employed to evaluate the post-crash kinematics of the Flex-PLI and a human leg model.The feasibility of adding a supplemental weight to the Flex-PLI with regard to the bumper height is discussed.
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