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Thoracic Biomechanics with Air Bag Restraint
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 01, 1993 by SAE International in United States
Annotation ability available
Event: Stapp Car Crash Conference
The objective of the present study was to determine the biomechanics of the human thorax in a simulated frontal impact. Fourteen unembalmed human cadavers were subjected to deceleration sled tests at velocities of nine or 13 m/s. Air bag - knee bolster, air bag - lap belt, and air bag - three-point belt restraint systems were used with the specimen positioned in the driver's seat. Two chest bands were used to derive the deformation patterns at the upper and lower thoracic levels. Lap and shoulder belt forces were recorded with seatbelt transducers. After the test, specimens were evaluated using palpation, radiography, and a detailed autopsy. Thoracic trauma was graded according to the Abbreviated Injury Scale based on autopsy findings. Peak thoracic deformations were normalized with respect to the initial chest depth to facilitate comparison between the specimens.
Results indicated that under any restraint combination, regional differences exist in the deformation response between the upper and lower thoracic levels. The air bag - knee bolster tests indicated more uniform compressions of the thorax (based on chest band contours), demonstrated greater maximum lower chest deflections, produced fractures in the lower region of the thorax due to steering wheel contact, allowed greater hip and torso excursion, and produced significant steering wheel and column loading with permanent deformations. The air bag - lap belt experiments indicated uniform compressions of the thorax (chest band contours), produced minimal fractures, allowed greater torso excursion but less hip excursion, and produced significant steering wheel and column loading with residual deformations. The air bag - three-point belt system tests indicated high localized compressions of the thorax (chest band contours), produced multiple rib fractures consistent with shoulder belt loading, allowed less hip and torso excursion, and produced virtually no steering wheel and column loading. Based on the contours of thoracic deformation, kinematics and injury patterns, the biomechanical response of the human thorax is different between air bag - three point belt loading compared to the air bag - knee bolster/lap belt restraint combination.
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- Narayan Yoganandan - Medical College of Wisconsin and V. A. Medical Center
- Frank A. Pintar - Medical College of Wisconsin and V. A. Medical Center
- David Skrade - Medical College of Wisconsin and V. A. Medical Center
- Wayne Chmiel - Medical College of Wisconsin and V. A. Medical Center
- John M. Reinartz - Medical College of Wisconsin and V. A. Medical Center
- Anthony Sances - Medical College of Wisconsin and V. A. Medical Center
CitationYoganandan, N., Pintar, F., Skrade, D., Chmiel, W. et al., "Thoracic Biomechanics with Air Bag Restraint," SAE Technical Paper 933121, 1993, https://doi.org/10.4271/933121.
SAE 1993 Transactions: Journal of Passenger Cars
Number: V102-6; Published: 1994-09-01
Number: V102-6; Published: 1994-09-01
- “Driver Deaths Down Substantially in Cars Equipped with Air Bags,” Status Report Insurance Institute for Highway Safety 27 12 October 3 1992
- Eppinger RH On the development of a deformation measurement system and its application toward developing mechanically based indices 892426 Proc 33rd Stapp Car Crash Conference Society of Automotive Engineers Washington, D.C. October 4-6 1989 21 28
- “Evaluation of the Effectiveness of Occupant Protection,” Interim Report, U.S. Department of Transportation, National Highway Traffic Safety Administration June 1992
- Hagedorn AV Eppinger RH Morgan RM Pritz HB Khaewpong N Application of a deformation measurement system to mechanical systems Intl Research Council on Biokinetics of Impact Berlin, Germany September 1991
- Kallieris D Mattern R Schmidt G Klaus G Comparison on three-point belt and air bag-knee bolster systems. Injury criteria and injury severity at simulated frontal collisions Intl Research Council on Biokinetics of Impact Cologne, Germany Sept. 1982 166 183
- Melvin JW Weber K Review of biomechanical impact response and injury in the automotive environment Report No. DOT HS 807 042, U.S. Department of Transportation, National Highway Traffic Safety Administration Washington, D.C. 1985 201
- Robbins D H Lehman R J Nusholtz G S Melvin J W Benson J B Stalnaker R L Culver R “Quantification-of Thoracic Response and Injury: The Gathering of Data,” Report No. UM-HSRI-82-33-1 The University of Michigan, Highway Safety Research-Institute August 31 1982
- Snyder RG Snow CC Young JW Crosby WM Price GT Pathology of trauma attributed to restraint systems in crash impacts Aerospace Med 39 8 812 829 1968
- Snyder RG Young JW Snow CC Experimental impact protection with advanced automotive restraint systems Preliminary primate tests with air bag and inertia reel/inverted-Y yoke torso harness: Paper No. 670922 , Proc. 11th Stapp Car Crash Conference Society of Automotive Engineers Anaheim, California October 10-11 1967 406 431
- Walsh MJ Kelleher BJ Evaluation of air cushion and belt restraint systems in identical crash situations using dummies and cadavera Paper No. 780893 , Proc. 22nd Stapp Car Crash Conference Society of Automotive Engineers Ann Arbor, Michigan October 24-26 1978 295 339
- Walsh MJ Romeo DJ Results of cadaver and anthropomorphic dummy tests in identical crash situations Paper No. 760803 , Proc. 20th Stapp Car Crash Conference Society of Automotive Engineers Dearborn, Michigan October 18-20 1976 107 131
- Yoganandan N Skrade D Pintar FA Reinartz J Sances A Thoracic deformation contours in a frontal impact Paper No. 912891 , Proc. 35th Stapp Car Crash Conference Society of Automotive Engineers San Diego, California November 18-20 1991 47 63