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Dynamic motion of the floor pan and axial loading through the feet in frontal crash tests
Technical Paper
1995-13-0028
Published September 13, 1995 by International Research Council on Biokinetics of Impact in Switzerland
Sector:
Language:
English
Abstract
Data from frontal crash tests involving a Ford Taurus in various
configurations were examined to characterize the dynamic response
of the floor pan and the brake pedal during impact and associate
their behavior with the axial loads transmitted through the dummy
feet.
Analysis of the data from these crash tests suggests that there
are floor pan acceleration pulses of high amplitude and short
duration which are associated with small floor pan intrusion and
high distal tibia axial loads. Conversely, there are floor pan
acceleration pulses of low amplitude and long duration which are
associated with large floor pan intrusion and low distal tibia
axial loads.
The axial loads measured by the load cells just above the ankles
in the dummies were highly correlated with the peak acceleration of
the floor pan or brake pedal. However, these axial loads did not
correlate well with the amount of floor pan/brake pedal
intrusion.
Occupant simulations using crash pulses identified in the actual
crashes suggested that compressive axial loading through the ankle
can be reduced by including several centimeters of suitable energy
absorbing padding on the floor pan.