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

Journal Article
2013-01-0215
ISSN: 2327-5626, e-ISSN: 2327-5634
DOI: https://doi.org/10.4271/2013-01-0215
Published April 08, 2013 by SAE International in United States
Flex-PLI Application to High-Bumper Vehicles - Optimization of Supplemental Weight
Sector:
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.
Language: English

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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