Abstract
Occupant ejection is a leading cause of injury in rollover accidents. This accident mode has a much higher rate of fatalities and injuries than any other accident mode; front, side or rear. While restraint use is one way to prevent occupant ejection, occupant retention through the use of alternate types of glazing or protecting the existing glazing will greatly reduce the number of occupant ejections. If the roof is strong enough to prevent deformation loading of the glazing, then occupant ejection portal formation will decrease by reducing glazing failure. This effect has been seen in experimental testing such as dolly rollovers and drop tests with reinforced vehicles. A newer test fixture, the Jordan Rollover System (JRS), allows for examination of glazing failure as a function of roof deformation and roof strength for similar impacts for production vehicles of various strengths. This study illustrates that glazing failure, and hence occupant ejection portal creation, decreases with increasing roof strength and decreasing roof deformation.
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