Evaluation of the Field Relevance of Several Injury Risk Functions

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					                                                                                                                      10S-44
                                   Stapp Car Crash Journal, Vol. 54 (November 2010), 49-72
                                 Stapp Car Crash Journal, Vol. 54 (November 2010), pp. pp.
                                           Copyright © 2010 The Stapp Association
                                          Copyright © 2010 The Stapp Association                                2010-22-0004


         Evaluation of the Field Relevance of Several Injury Risk Functions
                                                        Priya Prasad
                                                  Prasad Engineering, LLC

                                                      Harold J. Mertz
                                            General Motors Corporation (retired)

                                                   Dainius J. Dalmotas
                                                D.J. Dalm
				
DOCUMENT INFO
Description: An evaluation of the four injury risk curves proposed in the NHTSA NCAP for estimating the risk of AIS= 3 injuries to the head, neck, chest and AIS=2 injury to the Knee-Thigh-Hip (KTH) complex has been conducted. The predicted injury risk to the four body regions based on driver dummy responses in over 300 frontal NCAP tests were compared against those to drivers involved in real-world crashes of similar severity as represented in the NASS. The results of the study show that the predicted injury risks to the head and chest were slightly below those in NASS, and the predicted risk for the knee-thigh-hip complex was substantially below that observed in the NASS. The predicted risk for the neck by the Nij curve was greater than the observed risk in NASS by an order of magnitude due to the Nij risk curve predicting a non-zero risk when Nij = 0. An alternative and published Nte risk curve produced a risk estimate consistent with the NASS estimate of neck injury. Similarly, an alternative and published chest injury risk curve produced a risk estimate that was within the bounds of the NASS estimates. No published risk curve for femur compressive load could be found that would give risk estimates consistent with the range of the NASS estimates. Additional work on developing a femur compressive load risk curve is recommended. [PUBLICATION ABSTRACT]
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