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Analytical Studies of the Head Injury Criterion (HIC)
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English
Abstract
The Head Injury Criterion (HIC) in FMVSS 208 for evaluating the potential head injury requires maximization of a mathematical expression, involving the time-average acceleration, by varying the limits (t1, t2) of the time interval over which the average is calculated.
This paper describes the HIC behavior through the analysis of a function of two independent variables t1 and t2. The analysis is carried out for any arbitrary acceleration profile a(t). It is found that maximization requires that a(t1) = a(t2). Also, for the unique values of t1 and t2 that maximize HIC, the average acceleration between t1 and t2 is 5/3 times the acceleration at t1 or t2. Illustrative examples are provided by applying this condition to simple pulses. Numerical results are presented in tables and graphs.
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Citation
Chou, C. and Nyquist, G., "Analytical Studies of the Head Injury Criterion (HIC)," SAE Technical Paper 740082, 1974, https://doi.org/10.4271/740082.Also In
References
- Gadd C. W. “Use of a Weighted-Impulse Criterion for Estimating Injury Hazard.” Paper 660793 12 New York Society of Automotive Engineers, Inc. 1966
- Patrick L. M. Lissner H. R. Gurdjian E. S. “Survival by Design-Head Protection.” Proceedings of Seventh Stapp Car Crash Conference 1963
- Department of Transportation NHTSA Docket Number 69-7 Occupant Crash Protection-Head Injury Criteria 208
- Hildebrand F. B. “Advanced Calculus for Applications.” Englewood Cliffs N. J Prentice Hall 1962 350 351
- Henrici P. “Elements of Numerical Analysis.” New York 1964
- Speigel M. R. “Mathematical Handbook of Formulas and Tables.” Schaum's Outline Series New York McGraw-Hill Book Co. 1968 235