System Design Parameters in Determining Automotive Sidelite Glazing Performance

A study has been conducted to develop design criteria for materials for use in glazing systems and to identify the parameters affecting actual intrusion-resistance. The intent is to be able to provide the automotive consumer with enhancements in occupant security and safety through incorporation of enhanced protective glass (EPG) in body glass locations. Based on actual sidelite attacks and measurements of human applied forces, an appropriate and comprehensive test methodology has been developed. The test method extends beyond simple impact by providing a measure of the applied force or energy to gain entry to the vehicle through the sidelite as installed in a vehicle. Tests have revealed that the performance level depends not only on the particular glazing type utilized, but how it engages with the door system which in turn controls the in-service performance. Information generated by this methodology has compared favorably with time-to-vehicle-entry obtained from direct human attack. This type of comprehensive testing has provided valuable information for guiding glazing development and outlining parameters for proper design of door systems.

The sidelite testing and product evaluation has also provided insight into factors which relate to occupant interaction and safety when occupant contact with body glass occurs. Many of the relationships overlap between occupant security and safety, such that, if a reasonable degree of intrusion-resistance is provided, there will be a commensurate benefit in occupant safety (c.f., ejection-mitigation).