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Comparison of the THOR and Hybrid III Lower Extremities in Laboratory Testing
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2007 by SAE International in United States
Annotation ability available
A comparison of the 50th percentile male THOR-LX and Hybrid III 50th percentile male dummy lower leg was conducted via component and full scale barrier testing. In the component tests, isolated THOR-LX and Hybrid III lower legs were impacted in two different test set-ups where the tibia was impacted at three different impact points. The foot without a shoe was impacted in two different test set-ups at six different impact points. A shoe impact study was also conducted to determine the effect of a shoe on the results and to determine how many impacts a shoe can withstand at each point before properties of the shoe begin to change. For these tests, the THOR-LX and Hybrid III lower legs were repeatedly impacted at four different points on the foot with a shoe. For the full scale barrier testing, the THOR-LX or Hybrid III lower legs were attached to a belted Hybrid III 50th percentile male dummy. The dummy was positioned in a compact car for each test. Each lower extremity type was tested in a left hand side 40% offset crash at 40mph and a full frontal New Car Assessment Program (NCAP) rigid barrier test at 35 mph.
This study concluded that the component testing revealed that the Achilles cable in the THOR-LX reduced the lower tibia moments about the y-axis (My) and increased the lower tibia axial forces (Fz) for dorsiflexion impacts. Upper tibia My for THOR-LX with a shoe in dorsiflexion inpacts was twice the value of My for THOR-LX without a shoe. The THOR-LX ankle reached full rotation more quickly than the Hybrid III ankle in dorsiflexion impacts contributing to the THOR-LX having higher Fz values in the lower tibia. The full scale vehicle tests showed similar performance between the THOR-LX and Hybrid III lower legs. The effects of floor pan intrusion were also evaluated.
CitationOlson, C., Rouhana, S., Spahn, B., and Scherer, R., "Comparison of the THOR and Hybrid III Lower Extremities in Laboratory Testing," SAE Technical Paper 2007-01-1168, 2007, https://doi.org/10.4271/2007-01-1168.
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