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The Influence of Body Mounted Shoulder Seat Belt Anchor (D-Ring) Displacement During Dynamic Vehicle-to-Ground Impacts
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2015 by SAE International in United States
Annotation ability available
For more than 30 years, field research and laboratory testing have consistently demonstrated that properly wearing a seat belt dramatically reduces the risk of occupant death or serious injury in motor vehicle crashes. In severe rollover crashes, deformation to vehicle body structures can relocate body-mounted seat belt anchors altering seat belt geometry. In particular, roof pillar mounted shoulder belt anchors (“D-rings”) are subject to vertical and lateral deformation in the vehicle coordinate system. The ROllover Component test System (ROCS) test device was utilized to evaluate seat belt system performance in simulated severe rollover roof-to-ground impacts. A mechanical actuator was designed to dynamically relocate the D-ring assembly during a roof-to-ground impact event in an otherwise rigid test vehicle fixture. Anthropomorphic test device (ATD) kinematics and kinetics and seat belt tensions were compared between tests with and without D-ring relocation. Results indicate that the displacement of the shoulder belt anchor does not have a substantial effect on either ATD axial neck loads or the restraint provided by the seat belt system while limiting the vertical motion of the ATD during a single roof-to-ground impact.
CitationToomey, D., Marth, D., Ballard, W., Belwafa, J. et al., "The Influence of Body Mounted Shoulder Seat Belt Anchor (D-Ring) Displacement During Dynamic Vehicle-to-Ground Impacts," SAE Technical Paper 2015-01-1756, 2015, https://doi.org/10.4271/2015-01-1756.
- Data Link Inc. Injuring Contacts in Light Vehicle Rollovers Report prepared for The NHTSA Crashworthiness Staffs Washington D.C. 1993
- Malliaris , C. and Digges , K. Crash Exposure and Crashworthiness of Sport Utility Vehicles SAE Paper 1999-01-0063 1999 10.4271/1999-01-0063
- Moore , T. et al. Biomechanical Factors and Injury Risk in High-Severity Rollovers Annu Proc Assoc Adv Automot Med 49 133 150 2005
- Bedewi , P. et al. An Investigation of Occupant Injury in Rollover: NASS-CDS Analysis of Injury Severity and Source by Rollover Attributes 18th International Technical Conference on the Enhanced Safety of Vehicles Nagoya, JPN May 2003
- Hu , J. et al. Injury Patterns and Sources of Non-Ejected Occupants in Trip-Over Crashes: A Survey of NASS-CDS Database from 1997-2002 Annu Proc Assoc Adv Automot Med 49 119 132 2005
- Moffatt , E. , Cooper , E. , Croteau , J. , Orlowski , K. et al. Matched-Pair Rollover Impacts of Rollcaged and Production Roof Cars Using the Controlled Rollover Impact System (CRIS) SAE Technical Paper 2003-01-0172 2003 10.4271/2003-01-0172
- McCoy , R. , Chou , C. , and Van de Velde , R. A Dynamic Component Rollover Crash Test System SAE Technical Paper 2006-01-0721 2006 10.4271/2006-01-0721
- McCoy , R. and Chou , C. A Study of Kinematics of Occupants Restrained with Seat Belt Systems in Component Rollover Tests SAE Technical Paper 2007-01-0709 2007 10.4271/2007-01-0709
- McCoy , R. Passive Safety Technologies and Belted ATD Neck Loads in Rollover Events SAE Technical Paper 2010-01-1008 2010 10.4271/2010-01-1008
- Mertz , H. , Irwin , A. , and Prasad , P. Biomechanical and Scaling Bases for Frontal and Side Impact Iinjury Assessment Reference Values Stapp Car Crash Journal 47 155 188 2003
- Nightingale , R. , McElhaney , J. , Camacho , D. , Kleinberger , M. et al. The Dynamic Responses of the Cervical Spine: Buckling, End Conditions, and Tolerance in Compressive Impacts SAE Technical Paper 973344 1997 10.4271/973344
- Toomey D. , Mason M. , Hardy W. , Yang K. , Kopacz J. , Van Ee C. Exploring the Role of Lateral Bending Postures and Asymmetric Loading on Cervical Spine Compression Responses IMECE2009-12911, Proceedings of ASME 2009 International Mechanical Engineering Congress & Exposition November 2009
- Pywell , J. , Rouhana , S. , McCleary , J. , and DeSaele , K. Characterization of Belt Restraint Systems in Quasistatic Vehicle Rollover Tests SAE Technical Paper 973334 1997 10.4271/973334
- Padmadaban , J. and Burnett , R. Seat Integrated and Conventional Restraints: A Study of Crash Injury/Fatality Rates in Rollovers Ann Adv Automot Med 52 267 280 2008