An External Explosive Airbag Model for an Innovative Inflatable Bumper (I-bumper) Concept 2008-01-0508
In the I-bumper (inflatable bumper) concept , two explosive airbags are released just before the main body-to-body crash in order to absorb the kinetic energy of colliding vehicles. The release also actuates other components in the I-bumper, including a movable bumper and an energy absorption morphing lattice structure. A small explosive charge will be used to deploy the airbag. A conventional airbag model will be used to reduce the crash energy in a controlled manner and reduce the peak impact force. An analytic model of the explosive airbag is developed in this paper for the I-bumper system and for its optimal design, while the complete system design (I-bumper) will be discussed in a separate paper.
Analytical formulations for an explosive airbag will be developed and major design variables will be identified. These are used to determine the required amount of explosive and predict airbag behavior, as well to predict their impact on the I-bumper system. Related design guidelines and procedures will also be introduced. This new explosive airbag model will be implemented in Matlab, and will be validated with a high fidelity model using an LS-DYNA simulation.