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The Utility of Hybrid III and THOR Chest Deflection for Discriminating Between Standard and Force-Limiting Belt Systems
Technical Paper
2003-22-0013
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English
Abstract
Recent field data studies have shown that force-limiting belt systems reduce the occurrence of thoracic injuries in frontal crashes relative to standard (not force-limiting) belt systems. Laboratory cadaver tests have also shown reductions in trauma, as well as in chest deflection, associated with a force-limiting belt. On the other hand, tests using anthropomorphic test devices (ATDs) have shown trends indicating increased, decreased, or unchanged chest deflection. This paper attempts to resolve previous experimental studies by comparing the anterior-posterior and lateral chest deflections measured by the THOR and Hybrid III (H-III) dummies over a range of experimental conditions. The analysis involves nineteen 48-km/h and 57-km/h sled tests utilizing force-limiting and standard seat belt systems, both with an air bag. Tests on both the driver side and the passenger side are considered. The purpose of the study is to evaluate whether either dummy could differentiate between the two belt types over a range of sled pulse shapes, seating positions, and belt force limits. The comparison shows that both dummies exhibit significantly (p < 0.05) greater maximum chest deflection (Cmax) with the standard belt. In the driver-side tests (3 kN force limit), Cmax for THOR and H-III was 51.6% and 64.4% greater while, in the passenger-side tests (4 kN force limit), Cmax was 16.6% and 30.6% greater. Lateral deflections increased similarly, as did resultant chest acceleration. It is concluded that over the range of conditions considered here, both dummies consistently ranked the restraint systems appropriately. We conclude by hypothesizing several potential explanations for the different findings among studies in the literature.
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Kent, R., Lessley, D., Shaw, G., and Crandall, J., "The Utility of Hybrid III and THOR Chest Deflection for Discriminating Between Standard and Force-Limiting Belt Systems," SAE Technical Paper 2003-22-0013, 2003, https://doi.org/10.4271/2003-22-0013.Also In
References
- Adomeit D. 1977 Evaluation methods for the biomechanical quality of restraint systems during frontal loading Proc. 21st Stapp Car Crash Conference 911 932 Paper 770936 Society of Automotive Engineers Warrendale, PA
- Artis M. McDonald J. Beach D. Poland J. Campbell R. Rangarajan N. Delbridge D. Shams T. Huang T. 2001 THOR Alpha 50% Male Adavanced Frontal Dummy User's Manual – Version 1.1 General Engineering and Systems Analysis Company, Inc. Boonsboro, MD
- Butcher J. Shaw G. Bass C Kent R. Crandall J. 2001 Displacement measurements in the Hybrid III chest Paper No. 2001-01-0118 Society of Automotive Engineers Warrendale, PA
- Crandall J. Bass C Pilkey W. Morgan R. Eppinger R. Miller H. Sikorski J. 1997 Thoracic response and injury with belt, driver side air bag, and constant force retractor restraints International Journal of Crashworthiness 2 1 119 132
- Foret-Bruno J-Y. Hartemann F. Thomas C Fayon A. Tarriere C Got C. 1978 Correlation between thoracic lesions and force values measured at the shoulder belt of 92 belted occupants involved in real accidents Paper 780892 22nd Stapp Car Crash Conference Society of Automotive Engineers Warrendale, PA
- Foret-Bruno J-Y. Trosseille X. Le Coz J-Y. Bendjellal F. Steyer C. 1998 Thoracic injury risk in frontal car crashes with occupant restrained with belt load limiter Proc. 42nd Stapp Car Crash Conference 331 952 Paper 983166 Society of Automotive Engineers Warrendale, PA
- Foret-Bruno J-Y. Trosseille X. Page Y. Huere J-F Le Coz J-Y. Bendjellal F. Diboine A. Phalempin T. Villeforceix D. Baudrit P. Guillemot H. Coltat J-C 2001 Comparison of thoracic injury risk in frontal car crashes for occupants restrained without belt load limiters and those restrained with 6 kN and 4 kN belt load limiters Stapp Car Crash Journal 45 205 224
- Horsch J. Melvin J. Viano D. Mertz H. 1991 Thoracic injury assessment of belt restraint systems based on Hybrid III chest compression Proc. 35th Stapp Car Crash Conference 85 108 Society of Automotive Engineers Warrendale, PA
- Kallieris D. Rizzetti A. Mattern R. Morgan R. Eppinger R. Keenan L. 1995 On the synergism of the driver air bag and the 3-point belt in frontal collisions Paper 952700 Society of Automotive Engineers Warrendale, PA
- Kent R. W. Crandall J. R. Bolton J. R. Nusholtz G.S. Prasad P. Mertz H. 2001a The Influence of Superficial Soft Tissues and Restraint Condition on Thoracic Skeletal Injury Prediction Stapp Car Crash Journal 45 183 204
- Kent R. Bolton J. Crandall J. Prasad P. Nusholtz G. Mertz H. Kallieris D. 2001b Restrained Hybrid III dummy-based criteria for thoracic hard tissue injury prediction 2001 Conference of the International Research Council on the Biomechanics of Impact (IRCOBI) Isle of Man
- Kent R. Patrie J. Benson N. 2003a The Hybrid III dummy as a discriminator of injurious and non-injurious restraint loading Annual Conference of the Association for the Advancement of Automotive Medicine Des Plaines, IL
- Kent R. Patrie J. Poteau F. Matsuoka F. Mullen C. 2003b Development of an age-dependent thoracic injury criterion for frontal impact restraint loading Paper 72 Proc. Conference on the Enhanced Safety of Vehicles (ESV) Nagoya, Japan
- Kent R. Shaw G. Lessley D. Crandall J. Kallieris D. Svensson M. 2003c Comparison of belted Hybrid III, THOR, and cadaver thoracic responses in oblique frontal and full frontal sled tests Paper 2003-01-0160 Society of Automotive Engineers Warrendale, PA
- Kuppa S. Eppinger R. 1998 Development of an improved thoracic injury criterion Paper 983153 Proc. 42nd Stapp Car Crash Conference
- Mertz H. Williamson J. Lugt D. 1995 The effect of limiting shoulder belt load with airbag restraint Paper 950886 Society of Automotive Engineers Warrendale, PA
- Monash University Accident Research Center 1992 Feasibility of occupant protection measures Federal Office of Road Safety Canberra, Australia
- Morgan R. Eppinger R. Haffner M. Yoganandan N. Pintar F. Sances A. Crandall J. Pilkey W. Klopp G. Dallieris D. Miltner E. Mattern R. Kuppa S. Sharpless C. 1994 Thoracic trauma assessment formulations for restrained drivers in simulated frontal impacts Paper number 942206 Proc. 38th Stapp Car Crash Conference 15 34
- NHTSA 2001 Fifth/Sixth Report to Congress: Effectiveness of Occupant Protection Systems and Their Use Report DOT HS 809 442 U.S. Department of Transportation Washington, DC
- Petitjean A. Lebarbe M. Potier P. Trosseille X. Lassau J. 2002 Laboratory reconstructions of real world frontal crash configurations using the Hybrid III and THOR dummies and PMHS Paper Number 2002-22-0002 , Stapp Car Crash Journal 46 27 54
- Rangarajan N. Shams T. McDonald J. White R. Oster J. Hjerpe E. Haffner M. 1998 Response of THOR in frontal sled testing in different restraint conditions Proc. International Research Council on the Biomechanics of Impact (IRCOBI) Goteberg, Sweden
- Schneider L. King A. Beebe M. 1989 Design Requirements and Specifications: Thorax-Abdomen Development Task, Interim Report, Trauma Assessment Device Development Program Report DOT HS 807 511 U.S. Department of Transportation
- Shaw G. Crandall J. Butcher J. 2000 Biofidelity evaluation of the THOR advanced frontal crash test dummy Proc. International Research Conference on the Biomechanics of Impact (IRCOBI) Montpellier, France
- Shaw C Kent R. Sieveka E. Crandall J. 2001 Spinal kinematics of restrained occupants in frontal impacts 2001 Conference of the International Research Council on the Biomechanics of Impact (IRCOBI) Isle of Man
- Xu L Jensen J Brynes K Kim A Agaram V Davis K Hultman R Kostyniuk G Marshall M Mertz H Nusholtz G Rouhana S Scherer R 2000 Comparative performance evaluation of THOR and Hybrid III SAE paper no. 2000-01-0161 SAE Warrendale, PA