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Determining Tolerance to Compression and Viscous Injury in Frontal and Lateral Impacts
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Sector:
Event:
Stapp Car Crash Conference
Language:
English
Abstract
Considerable research has shown that there are two mechanisms of blunt injury. One is by crushing the tissue at low velocities of deformation (compression mechanism, C) and the other by a rate-dependent deformation at higher speeds that exceed the energy dissipation of the tissue (viscous mechanism, VC). Analysis of injury causation in experiments must consider both mechanisms. For an impact, there is a peak compression and Viscous response; however, it is not possible a priori to determine which mechanism is associated with the injury. Thus, there has been a need to identify the effective velocity separating the two mechanisms of injury.
This study provides new injury tolerances and probability functions for various body and tissue impacts based on injury data related to a compression or viscous mechanism. Six data sets were subjected to statistical analysis to predict injury based on maximum compression and Viscous response of the surrogate or tissue. A set of logistic regression statistics was generated for each data set by repeating the analysis at different levels of velocity. For each data set, goodness of fit was plotted versus velocity and revealed a unique velocity that was most effective in separating the two injury mechanisms. The correlation of VC to the injury became poorer as test data below the transition velocity were added to the statistical analysis.
This new method provides more objectively based tolerance levels of compression and Viscous response and the specific range of deformation velocities for which VC is applicable. Tolerance levels are specified for frontal and lateral impact of the chest and abdomen.
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Authors
Citation
Ridella, S. and Viano, D., "Determining Tolerance to Compression and Viscous Injury in Frontal and Lateral Impacts," SAE Technical Paper 902330, 1990, https://doi.org/10.4271/902330.Also In
References
- Viano D.C. King A.I. Melvin J.W. Weber K. Injury biomechanics research: An essential element in the prevention of trauma J. Biomechanics 22 5 403 417 1989
- Viano D.C. Lau I.V. A viscous tolerance criterion for soft tissue injury assessment J. Biomechanics 21 5 387 399 1988
- Rouhana S.W. Ridella S.A. Viano D.C. The effect of limiting impact force on abdominal injury: A preliminary study Proceedings of the Thirtieth Stapp Car Crash Conference 189 Society of Automotive Engineers Paper No. 861879 Warrendale, PA. 65 79 1986
- Lighthall J.W. 1988
- Kearney P.K. Ridella S.A. Viano D.C. Anderson T.E. Interaction of contact velocity and cord compression in determining the severity of spinal cord injury J. Neurotrauma 5 3 187 208 1988
- Lau I.V. Viano D.C. The Viscous Criterion-Bases and applications of an injury severity index for soft tissues Proceedings of the Thirtieth Stapp Car Crash Conference 189 Society of Automotive Engineers Paper No. 861882 Warrendale, PA. 123 142 1986
- Kroell C.K. Schneider D.C. Nahum A.M. Impact tolerance and response of the human thorax Proceedings of the Fifteenth Stapp Car Crash Conference Society of Automotive Engineers Paper No. 710851 Warrendale, PA. 84 134 1971
- Viano D.C. Lau I.V. Asbury C. King A.I. Begeman P. Biomechanics of the human chest, abdomen, and pelvis in lateral impact Accident Analysis and Prevention 21 6 553 574 1989
- Miller M.A. The biomechanical response of the lower abdomen to belt-restraint loading J. Trauma 29 11 1571 1584 1989
- Viano D.C. Lau I.V. Andrzejak D.V. Asbury C. Biomechanics of injury in lateral impact Accident Analysis and Prevention 21 6 535 551 1989
- Kroell C.K. Allen S.D. Warner C. Y. Perl T.R. Interrelationship of velocity and chest compression in blunt thoracic impact to swine II Proceedings of the Thirtieth Stapp Car Crash Conference Society of Automotive Engineers Paper No. 861881 Warrendale PA. 99 122 1986
- SAS Institute Inc. The LOGIST Procedure SAS Supplemental Library User's Guide: Version 5 Edition SAS Institute Inc. Cary, NC. 269 293 1985