Abstract
There is increasing pressure to reduce injuries and fatalities by effectively using airbags for side impact and out-of-position impact loading conditions. The simulation of these scenarios is particularly difficult as the occupant is interacting with the airbag at early times during the airbag deployment when the detailed behaviour of the airbag can have a significant effect. A new airbag inflation simulation capability that overcomes this problem has been integrated into the crash simulation software MADYMO. This allows accurate simulation of the gas flow within the airbag throughout the inflation and unfolding process. The new module uses CFD techniques to numerically model the interior volume of the airbag in detail. The pressure field within the airbag is directly coupled to the standard WYMO FE model of the airbag. Hence, the acceleration and movement of the airbag and any bodies in contact with it can be predicted more accurately.
Published Version
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