Abstract:

Femur injurie modifier assessments were investigated and Knee Mapping assessment procedure
was summarized to avoid over-modifiers due to femur injuries. The performances of a vehicle were assessed
according to the assessment method for femur protection in the front offset impact test in the Euro New Car
Assessment Program (Euro NCAP), and an evaluation process of femur injury was designed. Simulation
optimize analysis was done by a Knee Mapping Finite Element method for femur injuries at some potential hard
points (possible injuring femur). The results show that the femur injuries are efficiently reduced by providing
sufficient deformation space in the internal structure of instrument panel, and by designing energy absorbing
structure with foam and metal sheet behind the cover. Therefore, the optimized method satisfies the femur force
requirements of Knee Mapping and can avoid femur over-modifiers.

Key words: automotive engineering, passive safety, femur injuries, modifiers, knee mapping test, deformation space, energy absorbing structure