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Comparison of WorldSID and cadaver responses in low-speed and high-speed nearside impact

A series of lateral impact tests was performed in which the WorldSID midsize-male crash-test dummy was struck with a segmented padded impactor that separately loaded the thorax, abdomen, iliac wing, greater trochanter, and mid thigh. Tests were conducted using 8 m/s and 3 m/s initial impact velocities with velocity histories that mimic those produced in staged side-impact tests. A 5.1-cm abdomen offset was used to produce similar loading conditions as were used in a recently reported set of side-impact tests performed using seven male cadavers. WorldSID thorax, abdomen, iliac crest, pelvis, and mid thigh forces, internal/external deflections, and pelvis accelerations were compared to plus or minue 1SD corridors developed from the 3-m/s and 8-m/s cadaver responses. Results of these comparisons indicate that the WorldSID abdomen produces impact forces that are higher than the associated cadaver response corridor and external deflections that are lower than the associated response corridor for both the 3 m/s and 8 m/s loading conditions, suggesting that the abdomen rib stiffness should be reduced. Greater-trochanter and iliac-wing forces in 3-m/s tests were within, or slightly above, response corridors while these same measurements were substantially above response corridors for the 8-m/s tests. Lateral accelerations of the pelvis in the 3-m/s tests were slightly above target response corridors while lateral pelvic accelerations in the 8-m/s tests were within target response corridors. The combination of these results suggest that the WorldSID pelvis is too stiff and has too much tightly coupled mass.

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