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Small Occupant Neck Injury Biomechanics in Frontal Crash: A Study to Address the Variation in Restraint Performance with a Conventional 3-Point Single Loop Belt System
Technical Paper
2017-26-0003
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The seatbelt is the primary restraint device that increases the level of occupant protection in a frontal crash. The belt performance is enhanced by the supplemental restraint provided by the airbag; seat and knee bolster working in combination with this primary restraining device. Small occupants are vulnerable to upper neck injuries when seated very close to the steering wheel. A lot of research and data availability for this situation ultimately led to the development of countermeasures capable of reducing upper neck loading. However, no data or research is available on the lower neck dynamic response of a small occupant primarily a 5th percentile female seated away from the steering wheel.
MADYMO (Mathematical Dynamic Modeling), a biodynamic code is employed to validate a standard NHTSA (National Highway Traffic Safety Administration) frontal impact rigid barrier test with a 5th percentile ATD (Anthropomorphic Test Device) in the driver position. This validated model is utilized to understand the effect of the chest to steering wheel distance on the lower neck flexion values. This study demonstrates that with the conventional seatbelt system the occupant protection performance changes with a change in the chest to steering distance. Sensitivity analysis is employed to identify the most significant factor dictating the small occupant’s lower neck biomechanics.
The study shows that with an increase in distance between the chest to steering wheel, the lower neck flexion moment increase for a 5th percentile female when restrained by a conventional single loop seatbelt system. Analytical method in conjunction with computational simulations is used to explain the data trend.
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Citation
Thorbole, C., "Small Occupant Neck Injury Biomechanics in Frontal Crash: A Study to Address the Variation in Restraint Performance with a Conventional 3-Point Single Loop Belt System," SAE Technical Paper 2017-26-0003, 2017, https://doi.org/10.4271/2017-26-0003.Also In
References
- Glassbrenner , D. Estimating the lives saved by seat belts and air bags Washington DC, USA National Highway and Traffic Safety Administration 2003
- Kahane , Charles Jesse Fatality reduction by safety belts for front-seat occupants of cars and light trucks: Updated and expanded estimates based on 1986-99 FARS Data 2000
- National Highway Traffic Safety Administration Lives Saved in 2008 by Restraint Use And Minimum Drinking Age Laws (Report No. DOT HS 811 153) Washington, DC US Department of Transportation 2010
- Thorbole , Chandrashekhar K. Seatbelt submarining injury and its prevention countermeasures: How a cantilever seat pan structure exacerbate submarining Journal of family medicine and primary care 4.4 2015 587
- Walz , Marie NCAP test improvements with pretensioners and load limiters Traffic injury prevention 5.1 2004 18 25
- Foret-Bruno , Jean-Yves et al. Comparison of Thoracic Injury Risk in Frontal Car Crashes for Occupant Restrained without Belt Load Limiters and Those Restrained with 6 kN and 4 kN Belt Load Limiters Stapp car crash journal 45 2001 205 224
- Adomeit , D. and Heger , A. Motion Sequence Criteria and Design Proposals for Restraint Devices in Order to Avoid Unfavorable Biomechanic Conditions and Submarining SAE Technical Paper 751146 1975 10.4271/751146
- Bose , Dipan , Maria Segui-Gomez , ScD , and Crandall Jeff R. Vulnerability of female drivers involved in motor vehicle crashes: an analysis of US population at risk American journal of public health 101.12 2011 2368 2373
- Parenteau , Chantal S. et al. Restrained Male and Female Occupants in Frontal Crashes: Are We Different? 2013 IRCOBI Conference Proceedings 2013
- Moran , Stephan G. et al. Injury rates among restrained drivers in motor vehicle collisions: the role of body habitus Journal of Trauma and Acute Care Surgery 52.6 2002 1116 1120
- ALLEN BEN L. , Jr et al. A mechanistic classification of closed, indirect fractures and dislocations of the lower cervical spine Spine 7.1 1982 1 27
- Bauze , ROBERT J. , and Ardran Gordon M. Experimental production of forward dislocation in the human cervical spine Bone & Joint Journal 60.2 1978 239 245
- Braakman , Reinder , and Vinken Pierre Jacques Unilateral facet interlocking in the lower cervical spine Bone & Joint Journal 49.2 1967 249 257
- Panjabi , Manohar M. et al. Cervical facet joint kinematics during bilateral facet dislocation European Spine Journal 16.10 2007 1680 1688
- http://www.nhtsa.gov/Research
- Kanno , Y. , Masuda , M. , and Matsuoka , F. Evaluations of the Recommended New Parts for the Hybrid III Dummy - Neck Shield and Hip Joint SAE Technical Paper 960450 1996 10.4271/960450
- Agaram , Venkatesh et al. Hybrid III dummy neck response to airbag loading 17th International Technical Conference on the Enhanced Safety of Vehicles, Paper. No. 469 2001
- Prasad , P. and Daniel , R. A Biomechanical Analysis of Head, Neck, and Torso Injuries to Child Surrogates Due to Sudden Torso Acceleration SAE Technical Paper 841656 1984 10.4271/841656
- Chirvi , Sajal , Pintar Frank A. , and Yoganandan Narayan An Examination of Isolated and Interaction-Based Biomechanical Metrics for Potential Lower Neck Injury Criteria ASME 2015 International Mechanical Engineering Congress and Exposition American Society of Mechanical Engineers 2015
- Mertz Harold J. , Irwin Annette L. , and Prasad Priya Biomechanical and scaling bases for frontal and side impact injury assessment reference values Stapp car crash journal 47 2003 155
- Harberl , J. , Ritzl F. , and Eichinger S. The effect of fully seat-integrated front seat belt systems on vehicle occupants in frontal crashes National Highway Traffic Safety Administration 1989