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The Effects of Inboard Shoulder Belt and Lap Belt Loadings on Chest Deflection
Technical Paper
2018-22-0002
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English
Abstract
Chest injuries occur frequently in frontal collisions. During impact, tension in the lap belt is transferred to the inboard shoulder belt, which compresses the lower ribs of the occupant. In this research, inboard shoulder belt and lap belt geometries and forces were investigated to reduce chest deflection. First, the inboard shoulder belt geometry was changed by the lap/shoulder belt (L/S) junction for the rear seat occupant in sled tests using Hybrid III finite element simulation, sled tests and THOR simulation. As the L/S junction was closer to the ASIS (anterior superior iliac spine), chest deflection of the Hybrid III was smaller. The L/S junction around the ilium has the potential to reduce chest deflection without significant increase of head excursion. For THOR, although the chest deflection reduction effect due to closer L/S junction to the ASIS was observed, chest deflection was still substantially large since the lap belt overrode the ASIS.
Second, measures to hook the ASIS of the THOR by the lap belt were examined. Sled tests at 30 and 50 km/h were conducted with THOR in the rear seat, and it was demonstrated that the outboard lap belt and buckle pretensioners improved the lap belt and ASIS interaction, and were also useful in reducing the deflection at the inboard-side of the lower chest.
Finally, the lap belt overlap with the ASIS was compared among 10 volunteers, Hybrid III, and THOR. Some volunteers had the ASIS located at the torso-thigh junction, and the lap belt did not overlap the ASIS sufficiently. However, although the ASIS location of THOR is also at the torso-thigh junction, the lap belt overlapped the ASIS because of the abdomen’s and femur’s shape. In the future, it will be necessary to consider that the outboard lap belt and buckle pretensioners are also effective for the ASIS restraint of all human car occupants.
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Authors
Citation
Mizuno, K., Yoshida, R., Nakajima, Y., Tanaka, Y. et al., "The Effects of Inboard Shoulder Belt and Lap Belt Loadings on Chest Deflection," SAE Technical Paper 2018-22-0002, 2018, https://doi.org/10.4271/2018-22-0002.Data Sets - Support Documents
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References
- Aldman , B. 1962 Biodynamic studies on impact protection Acta Physiologica Scandinavia 56
- Beck , B. , Brown , J. , Bilston L.E. 2014 Assessment of Vehicle and restraint design changes for mitigating rear seat occupant injuries Traffic Injury Prevention 15 7 711 719
- Carroll , J. 2010 Overview of serious thorax injuries in European frontal car crash accidents and implications for crash accidents and implications for crash test dummy development IRCOBI Conference
- Digges , K. , Dalmotas D. , Prasad P. 2017 The need to control belt routing for silver NCAP ratings The 25th International Technical Conference on the Enhanced Safety of Vehicles
- Eickhoff , B. , Shrenk , W. , Zellmer , H. , Martin , M. 2011 Optimization of seat belt buckle motion for reducing chest deflection, using rib eye sensors The 22nd International Technical Conference on the Enhanced Safety of Vehicles
- Eickhoff , B. , Zellmer , H. , Forster , E. 2007 The mechanism of belt induced chest deflection: analysis and possibilities for reduction The 20th International Technical Conference on the Enhanced Safety of Vehicles
- Eggers , A. , Eickhoff , B. , Dobberstein , J. , Zellmer , H. , Adolph , T. 2014 Effects of variations in buckle position, double pretension and adaptive load limiting on advanced chest measurements of THOR and Hybrid III IRCOBI Conference
- Guerrero , M. , Butala , K. , Tangirala , R. , Klinkenberger , A. 2014 Comparison of the THOR and Hybrid III responses in oblique impacts SAE Int. J. Trans. Safety 2 2 279 300
- Håland , Y. , and Nilson , G. 1991 Seat belt pretensioners to avoid the risk of submarining – a study of lap belt slippage factors Proc. 13th International Conference on Experimental Safety Vehicles (ESV) 1060 1068
- Hardy , R.N. , Watson , J.W. , Cook R. , Zioupos P. , Forrester B. , Frampton R. , Page M. , Kennedy A. , Peach S. , Sproston P. 2005 Development and assessment of a bone scanning device to enhance restraint performance The 19th International Technical Conference on the Enhanced Safety of Vehicles
- Hong , S.W. , Park , W. , Hong , S. 2013 Thoracic injury characteristics of elderly drivers in real world car accidents The 24th International Technical Conference on the Enhanced Safety of Vehicles
- Horsch , J.D. , Hering , W.E. 1989 A kinematic analysis of lap-belt submarining for test dummies Proc. 33rd Stapp Car Crash Conference 281 288 Society of Automotive Engineers Warrendale, PA
- Hu , J. , Reed , M.P. , Rupp , J.D. , Fischer , K. , Lange , P. , Adler , A. 2017 Optimizing seat belt and airbag designs for rear seat occupant protection in frontal crasehes Stapp Car Crash Journal 661 67 100
- Hu J. , Fischer K. , Lange , P. , Adler , A. 2015 Effects of crash pulse, impact angle, occupant size, front seat location, and restraint system on rear seat occupant protecion SAE Technical Paper 2015- 01-1453
- Kemper , A.R. , Kennedy , E.A. , McNally , C. , Manoogian , S.J. , Stitzel , J.D. , Duma , S.M. 2011 Reducing chest injuries in automobile collisions: rib fracture timing and implications for thoracic injury criteria Annuals of Biomedical Engineering 39 8 2141 2151 2011
- Kent , R. , Robert , S. , Kerrigan , J. , Maltese , M. 2009 Pediatric thoracoabdominal biomechanics Stapp Car Crash Journal 53 373 401
- Kent , R. , Stacey , S. , Kindig , M. , Woods , W. , Evans , J. , Rouhana , S.W. , Higuchi , K. , Tanji , H. , Lawrence , S.S. 2008 Biomechanical response of the pediatric abdomen, part 2: injuries and their correlation with engineering parameters Stapp Car Crash Journal 52 135 166
- Kent , R. , Lee , S. , Darvish , K. , Wang , S. , Poster , C.S. , Lange , A.W. , Brede , C. , Lange , D. , Matsuoka , F. 2005 Structural and material changes in the aging thorax and their role in crash protection for older occupants Stapp Car Crash Journal 49 231 249
- Kent , R. , Lessley , D. , Sherwood , C. 2004 Thoracic response to dynamic, non-impact loading from a hub, distributed belt, diagonal belt, and double diagonal belts Stapp Car Crash Journal 48 495 519
- Kent R. , Shaw , G. , Lessley , D. , Crandall , J. , Kallieris , D. , Svensson , M. 2003 Comparison of belted Hybrid III, THOR and cadaver thoracic responses in oblique frontal and full frontal sled tests SAE Technical Paper 2015-01-1453
- Kuppa , S. , Saunders , J. , Fessahaie , O. 2005 Rear seat occupant protection in frontal crashes The 19th International Technical Conference on the Enhanced Safety of Vehicles
- Lee , E. , Craig , M. , Scarboro , M. 2015 Real-world rib fracture patterns in frontal crashes in different restraint conditions Traffic Injury Prevention 16 sup2 S115 S123
- Leung , Y.C. , Tarrière , C. , Lestrelin , D. , Hureau , J. , Got , C. , Guillon , F. , Patel , A. 1982 Submarining injuries of 3 pt. belted occupants in frontal collisions – Description, mechanisms and protection Proc. 26th Stapp Car Crash Conference 173 205 Society of Automotive Engineers Warrendale, PA
- Luet , C. , Trosseille , X. , Drazétic , P. , Potier , P. , Vallancien , G. 2012 Kinematics and dynamics of the pelvis in the process of submarining using PMHS sled tests Stapp Car Crash Journal 56 411 442
- MacLaughlin , T.F. , Sullivan , L.K. , O’Connor , C.S. 1989 Experimental investigation of rear seat submarining Proc. 12th International Conference on Experimental Safety Vehicles 261 271
- Matsuoka , F. , Kumagai , K. , Takahashi , H. 1989 Problem and improvement of HIII dummy rib cage feature Proc. 12th International Conference on Experimental Safety Vehicles 660 664
- Mertz , H. , Horsch , J. , Horn , G. , Lowne , R. 1991 Hybrid III sternal deflection associated with thoracic injury severities of ccupants restrained with force-limiting shoulder belts SAE Technical Paper 910812
- Mizuno , K. , Nezaki , S. , Ito , D. 2017 Comparison of chest injury measures of Hybrid III dummy International Journal of Crashworthiness 22 1 38 48
- Mroz K. , Pipkorn B. , Kim H.J. , Crandall J. 2017 Investigation of pelvis kinematics for various lap belt positions and an inflatable pelvis restraint cushion using a human body model of a female occupant The 25th International Technical Conference on the Enhanced Safety of Vehicles
- Nakane , N. , Nojiri , M. , Maekawa , R. , Esaki M. , Suzuki , S. , Masuda Y. , Hitosugi M. 2015 Analysis of abdominal injuries caused by the submarining phenomenon in the rear seat occupants The 24th International Technical Conference on the Enhanced Safety of Vehicles
- Östling M. , Sunnevång C , Svensson C. , Kock H.O. 2017 Potential future seating positions and the impact on injury risks in a Learning Intelligent Vehicle (LIV). VDI-Tagung Fahrzeugsicherheit
- Panzer , M. , Giudice , S. , Parent , D. 2015 THOR 50th male finite element model, user manual https://www.nhtsa.gov /biomechanicstrauma/THOR
- Park , J. , Ebert , S.M. , Reed , M.P. , Hallman , J.J. 2018 Comparison of three-point belt fit between humans and ATDs in rear seats Traffic Injury Prevention 19 sup1 S65 S69
- Park , J. , Ebert , S.M. , Reed , M.P. , Hallman , J.J. 2016 Effects of occupant and vehicle factors on three – point belt fit in rear seat IRCOBI Conference
- Pipkorn , B , López-Valdés , F.J. , Juste-Lorente , O. , Insausti , R. , Lundgren , C. , Sunnevång , C. 2016 Assessment of an innovative seat belt with independent control of the shoulder and lap portions using THOR tests, the THUMS model, and PMHS tests Traffic Injury Prevention 17 sup1 124 130
- Pipkorn , B. , López-Valdés , F.J. , Lundgren C. , Bråse D. , Sunnevång , C. 2009 Innovative seat belt system for reduced chest deflection The 21st International Technical Conference on the Enhanced Safety of Vehicles
- Reed , M.P. , Ebert , S.M. , Hallman , J.J. 2013 Effects of driver characteristics on seat belt fit Stapp Car Crash Journal 57 43 57
- Rouhana , S.W. , Horsch , J.D. , Kroell , C. 1989 Assessment of lap-shoulder belt restraint performance in laboratory testing Proc. 33rd Stapp Car Crash Conference 243 256 Society of Automotive Engineers Warrendale, PA
- Rouhana , S.W. , Bedewi , P.G. , Kankanala , S.V. , Prasad , P. , Zwolinski , J.J. , Meduvsky , A.G. , Rupp , J.D. , Jeffreys , T.A. , Schneider , LW 2003 Biomechanics of 4-point seat belt systems in frontal impacts Stapp Car Crash Journal 57 47 367 399
- Schneider , L.W. , Haffner , M.P , Eppinger , R.H. , Shalloum , M.J. , Beebe , M.S. , Rouhana , S.W. , King , A.I. , Hardy , W.H. , Neathery , R.F. 1992 Development of an advanced ATD thorax system for improved injury assessment in frontal crash environment Proc. 36th Stapp Car Crash Conference 129 155 Society of Automotive Engineers Warrendale, PA
- Shams , T. , Rangarajan , N. , McDonald , J. , Wang , Y. , Platten , G. , Shade , C. , Pope , P. , Haffner , M. 2005 Development of THOR-NT: enhanced of the THOR ALPHA – the NHTSA advanced frontal dummy The 19th International Technical Conference on the Enhanced Safety of Vehicles
- Shaw , G. , Lessley , D. , Ash , J. , Acosta , S. , Heltzel , S. , Riley , P. , Kim , T. , Crandall , J. 2016 Pelvic Restraint cushion sled test evaluation of pelvic forward motion Traffic Injury Prevention 19 3 250 255
- Shaw , G. , Crandall , J. , Butcher , J. 2000 Biofidelity evaluation of the THOR advanced frontal crash test dummy IRCOBI Conference
- Shimamura , M. , Ohashi , H. , Yamazaki , M. 2003 The effects of occupant age on patterns of rib fractures to belt-restrained drivers and front passengers in frontal crashes in Japan Stapp Car Crash Journal 47 349 365
- Subit , D. , Boruah , S. , Forman , J. , Salzar , R. , Crandall , J. 2013 Mechanical response of human ribs under antero-posterior bending: rib level variability and strain distribution Proc. of JSAE Spring Convention 61 13 1 6
- Uriot , J. , Baudrit , B. , Potier , P. , Trosseille , X. , Petit , P. , Guillemot , H. , Guérin , L. , Vallancien , G. 2006 Investigations on the belt-to-pelvis interaction in case of submaring Stapp Car Crash Journal 50 53 73
- Wells , R.P. , Norman , R.W. , Bishop , P. , Ranney , D.A. 1986 Assessment of the static fit of automobile lap-belt systems on front-seat passengers Ergonomics 29 8 955 976
- Yaguchi , M. , Ono , K. , Masuda , M. , Watamori , T. , Seshita , T. , Hibino , T. 2009 Comparison of dynamic responses of the THOR-NT and Hybrid III in offset frontal crash test The 21st International Technical Conference on the Enhanced Safety of Vehicles