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Injury Criteria for Combined Restraint Systems
Technical Paper
856051
Sector:
Language:
English
Abstract
The expected improved performance of a combined restraint system
where an airbag supplements the conventional safety belt was not
reflected in reduced g-values on the dummy's chest. However, by
the distribution of forces over the wider area of the airbag and
the corresponding reduction of the pressure exerted by the 3-point
belt, improved occupant protection is actually produced. Therefore,
a new method to measure the deflection of dummy ribs with strain
gauges has been developed. The resulting data indicate a
significantly reduced chest deflection when a combined system is
used.
Similarly, a concentrated load from a steering wheel in the
mouth area at a low HIC value means a higher injury risk compared
to a widely distributed load from an airbag at an even higher HIC
value. Consequently, an additional facial bone injury criterion
based on measurements of the specific loading on the dummy's
face would be useful, and an alternative calculation of HIC
focusing only on that portion of the head acceleration curve
assumed to have a brain-injury potential is necessary