Biomechanical Considerations for Abdominal Loading by Seat Belt Pretensioners

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Biomechanical Considerations for Abdominal Loading by Seat Belt Pretensioners Powered By Docstoc
					                                                                                    Submission Number 10S-43
                                    Stapp Crash Journal, Vol. 54 (November 2010), pp. pp.
                                 Stapp CarCar Crash Journal, Vol. 54 (November 2010),381-406
                                           Copyright © 2010 The Stapp Association
                                           Copyright © 2010 The Stapp Association                                   2010-22-0016


                    Biomechanical Considerations for Abdominal Loading
                                by Seat Belt Pretensioners
                          Stephen W. Rouhana, Raed E. El-Jawahri, Tony R. Laituri
                                                      Ford Motor Company

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ABSTRACT – While seat belts are the most effective safety technology in vehicles today, there are continual efforts in the
industry to improve their ability to reduce the risk of injury. In this paper, seat belt pretensioners and current trends towards more
powerful systems were reviewed and analyzed. These more powerful systems may be, among other things, systems that develop
higher belt forces, systems that remove slack from belt webbing at higher retraction speeds, or both.

The analysis started with validation of the Ford Human Body Finite Element Model f
				
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Description: While seat belts are the most effective safety technology in vehicles today, there are continual efforts in the industry to improve their ability to reduce the risk of injury. In this paper, seat belt pretensioners and current trends towards more powerful systems were reviewed and analyzed. These more powerful systems may be, among other things, systems that develop higher belt forces, systems that remove slack from belt webbing at higher retraction speeds, or both. The analysis started with validation of the Ford Human Body Finite Element Model for use in evaluation of abdominal belt loading by pretensioners. The model was then used to show that those studies, done with lap-only belts, can be used to establish injury metrics for tests done with lap-shoulder belts. Then, previously-performed PMHS studies were used to develop AIS 2+ and AIS 3+ injury risk curves for abdominal interaction with seat belts via logistic regression and reliability analysis with interval censoring. Finally, some considerations were developed for a possible laboratory test to evaluate higher-powered pretensioners. [PUBLICATION ABSTRACT]
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