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Biomechanical Assessment of a Rear-Seat Inflatable Seatbelt in Frontal Impacts
Published November 07, 2011 by The Stapp Association in United States
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This study evaluated the biomechanical performance of a rear-seat inflatable seatbelt system and compared it to that of a 3-point seatbelt system, which has a long history of good real-world performance. Frontal-impact sled tests were conducted with Hybrid III anthropomorphic test devices (ATDs) and with post mortem human subjects (PMHS) using both restraint systems and a generic rear-seat configuration. Results from these tests demonstrated: a) reduction in forward head excursion with the inflatable seatbelt system when compared to that of a 3-point seatbelt and; b) a reduction in ATD and PMHS peak chest deflections and the number of PMHS rib fractures with the inflatable seatbelt system and c) a reduction in PMHS cervical-spine injuries, due to the interaction of the chin with the inflated shoulder belt. These results suggest that an inflatable seatbelt system will offer additional benefits to some occupants in the rear seats. Further research is needed to assess the field effectiveness, customer comfort and acceptance and change in the belt usage rate with the inflatable seatbelt system.
- Srinivasan Sundararajan - Ford Motor Co.
- Stephen W. Rouhana - Ford Motor Co.
- Derek Board - Ford Motor Co.
- Ed DeSmet - Ford Motor Co.
- Priya Prasad - Ford Motor Company (retired)
- Jonathan D. Rupp - University of Michigan Transportation Research Institute
- Carl S. Miller - University of Michigan Transportation Research Institute
- Lawrence W. Schneider - University of Michigan Transportation Research Institute
CitationSundararajan, S., Rouhana, S., Board, D., DeSmet, E. et al., "Biomechanical Assessment of a Rear-Seat Inflatable Seatbelt in Frontal Impacts," SAE Technical Paper 2011-22-0008, 2011, https://doi.org/10.4271/2011-22-0008.
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