The Volvo XC 70 2001 model is used to conduct the full scale rollover crash test to determine the glazing and roof performance. The biodynamic codeMADYMO is used to model the vehicle and its occupant. The acceleration obtained from the full scale rollover test is used to prescribe the motion to the computational model. The front side occupants are 50th percentile Hybrid III ATD's. A Finite Element belt model is used for the analysis because of its capability to simulate the slip of the occupant under the shoulder belt. The simulation is carried out with different restraint types to quantify the head lateral and vertical excursions. The restraint type includes the conventional three-point system, integrated restraint in which thebelt is attached to the seat, and a restraint type in which an extra shoulder belt is added to a conventional and an integrated restraint. The driver and the passenger head kinematics are compared for each restraint type.A comparison is made for driver and passenger head excursion for different restraint types to demonstrate the effectiveness of each restraint in reducing excursion. The study indicates that an integrated seat belt resultsin less lateral and vertical head excursion, as compared to the conventional restraint. This study also indicates no significant improvement in reducing head excursion by the addition of an extra shoulder belt compared toa conventional or an integrated restraint. The full text of this paper may be found at: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv21/09-0491.pdf For the covering abstract see ITRD E145407.
Abstract