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Impact response of Hybrid III dummy and cadaver knee-femur-pelvis complex

The purpose of this work was to compare the Hybrid III and PMHS responses to axial impacts of the lower limb. The tests consisted of impacting the knee joint of the subject in seated position with no back support at 2.8 m/s and 4 m/s with a 12kg pendulum. Force and resultant acceleration time histories were obtained for both kinds of subject and compared. The dummy and PMHS responses concerning the femur, the iliac crest corresponding to the impacted leg and the sacrum followed the same pattern and HIII peak values were in the PMHS corridors for both impact velocities. But nevertheless significant differences were observed. It appeared that the dummy knee impact force was larger in magnitude and shorter in duration than the cadaver knee load in both test conditions. The response of the iliac crest corresponding to the no impacted leg was outside the PMHS corridors. The cinematic of the PMHS was not reproduced by the dummy that had a backward movement and underestimated the rotation of the cadaver. The results showed that the Hybrid III femur-pelvis complex did not provide a completely realistic representation of the human one.