Effects of Safety Belt Pretensioning on ATD Motion in Rigid Fixture Rollover Testing 2011-01-1118
General Motors conducted a series of subsystem rigid fixture sled rollover tests to evaluate the effects of various safety belt pyrotechnic pretensioners on Anthropomorphic Test Device (ATD) head motion. Twelve tests were conducted using a rigid fixture comprised of a modified compact sport utility vehicle (SUV) body encased in a rigid exoskeleton. The testing simulated the pre-trip/trip, free flight and first roof to ground impact phases of a field representative curb trip initiation rollover crash test with a roof to ground impact angle of approximately 180 degrees. Various combinations of safety belt lap anchor, buckle and retractor pretensioners were tested and film analysis was used to measure trailing side ATD head motion relative to the vehicle. Additionally, a new analysis technique of measuring the reduction of lap webbing length during the crash event was developed for evaluating the ability of a restraint system to reduce ATD head motion during the rollover tests. The results indicated that with deployment times prior to occupant belt loading, certain pretensioner combinations were able to reduce the lateral and vertical motion of the trailing side ATD head when compared to non-pretensioner baseline tests.
Citation: White, J., Sevigny, J., Antonucci, A., Haldenwanger, M. et al., "Effects of Safety Belt Pretensioning on ATD Motion in Rigid Fixture Rollover Testing," SAE Int. J. Passeng. Cars – Mech. Syst. 4(1):904-916, 2011, https://doi.org/10.4271/2011-01-1118. Download Citation
James White, Jennifer Sevigny, Antonio Antonucci, Michael Haldenwanger, Bridget M. O'Brien-Mitchell, Stephen Joseph Cassatta, Michael Wendzinski, Gerald Cooper
General Motors Company, Cooper Consulting LLC
SAE 2011 World Congress & Exhibition
SAE International Journal of Passenger Cars - Mechanical Systems-V120-6, SAE International Journal of Passenger Cars - Mechanical Systems-V120-6EJ, Rear Impact, Rollover, and Side Impacts, 2011-SP-2303