Samenvatting
A kinematic view of the test dummy pelvis "unhooking" from the lap- belt was developed from a series of sled tests. The dynamics of the test resulted in reducing the vertical angle of the lap- belt and rearward rotation of the top of the pelvis. Both of these motions acted to "unhook" the belt from the pelvis. When a "critical" angle between the belt and pelvis was reached, the belt "slipped' from the pelvic spines and directly loaded the abdomen.