The Traffic Accident Reconstruction Origin -ARnews-

Re: Reduction of Passenger Vehicle Stiffness Coefficients...

Craig Luker (forensic@netshop.net)
Wed, 17 Jul 1996 15:42:39 -0400 (EDT)

The Accident Reconstruction Journal published the results of some
NHTSA sponsored tests where a 93 Civic and 90 Taurus were collided
with a typical tractor-trailer underride guard.

If you look at the crush and equivalent impact speeds (they were repeat
tests so the equivalent speed is necessary) then caluclate the stiffness
coefficients for that data it looks like the Taurus has approximately the
same values for bumper included collisions as for bumper override.
collisions. The Honda override values are about 50% of it's non-override
ones.

The Taurus results seem counter-intuitive. The article's author explained
it as possibly greater friction between the top of the Taurus bumper and
the underride guard. Unfortunately the exact vertical alignment of the
two cars to the guard was not given.
Craig Luker
forensic@netshop.net

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