The Inflatable Tubular Structure (ITS) airbag is a potentially life-saving device that has been implemented recently in some luxury passenger vehicles. When deployed, the ITS-airbag provides primarily protection of the front seat occupant’s head and face against upper side-interior car components. In the current research, a nonlinear Finite Element (FE) model for ITS-airbag system was proposed, developed, and tested in a side impact using dummy-head and neck FE model. The modeling technique of the unique behavior of the outer layer of the ITS-airbag is explained in details. Modeling such a complicated behavior of the ITS (axial shrinkage and radial expansion) was successfully performed by using a combination of diagonal truss elements combined with an isotropic fabric material.

Nonlinear FE side-impact simulations for a Hybrid-III dummy-head and neck model impacting a vehicle’s side glassing, roof-rail, and B-pillar using the ITS airbag system were conducted using the explicit FE code LS-DYNA. The developed ITS model has reduced the Head Injury Criteria (HIC) and the peak-acceleration of the dummy-head significantly. The results indicated the ability of the developed finite element model to represent the real ITS airbag system and therefore provide a reliable nonlinear FE simulation results that could be used to test, improve, and validate the implementation of the ITS airbag systems in more vehicles.

This content is only available via PDF.
You do not currently have access to this content.