Injury Criteria for Combined Restraint Systems 856051
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
Author(s):
Lothar Grösch
Affiliated:
Daimler-Benz, Sindelfingen
Pages: 6
Event:
International Technical Conference on Enhanced Safety of Vehicles
Related Topics:
Restraint systems
Safety belts
Occupant protection
Airbag systems
Head
Injuries
Anthropometric test devices
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