An approach to capture the residual strength of laminated safety glass according to the FMVSS 226 load case Ejection Mitigation with the finite-element software LS-DYNA

Abstract

Since March 2011, car manufacturers have to consider the newly released Federal Motor Vehicle Safety Standard 226 Ejection Mitigation (FMVSS 226) during the vehicle development and for the final testing prior to release. This safety standard shall prevent vehicle occupants from being ejected through the vehicle’s side windows made out of laminated safety glass, especially during rollover or side-impact accidents. For evaluation, initially, damaged safety glass panes are loaded with a head impactor with different velocities and at different positions. In order to develop a simulation model being able to represent such load cases, several drop tests on different safety glass geometries are performed and compared with simulation results gained with different modelling techniques. Special attention has to be given to the consideration of a crack pattern in the developed simulation model applied to the laminated safety glass prior the experimental drop testing. The proposed modelling technique will be evaluated using the finite-element software LS-DYNA.