Estimating the Minimum Space to Meet Federal Interior Head Impact Requirement

Paper #:
  • 950333

Published:
  • 1995-02-01
Citation:
Lim, G., Chou, C., Patel, R., Shahab, S. et al., "Estimating the Minimum Space to Meet Federal Interior Head Impact Requirement," SAE Technical Paper 950333, 1995, https://doi.org/10.4271/950333.
Pages:
13
Abstract:
NHTSA is expected to publish a final rule on Interior Head Impact (as an amendment to FMVSS 201) by early 1995. One of the Interior Head Impact Study objectives is to develop a methodology for estimating the minimum head impact space requirements to meet this regulation. The physical parameters affecting the HIC (Head Injury Criterion) are impact velocity, maximum headform stopping distance, peak deceleration, and pulse duration. The equations for estimating the HIC vs. Head Impact Space Requirements are formulated by relating these physical parameters to the Idealized Waveforms of Square Wave, Sine Wave, and Haversine Wave. This methodology has been extended to include the Generic Waveform. Tabulations of Maximum Headform Stopping Distance Requirement vs. Peak Deceleration, Pulse Duration, and HIC for the three Idealized Waveforms at 6.7 m/s (15 mph) impact speed have been generated to provide an estimate of the head impact package space requirement. Illustrations and examples are provided to demonstrate applications.
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