Effectiveness of Countermeasures in Upper Interior Head Impact

Paper #:
  • 970391

Published:
  • 1997-02-24
Citation:
Deb, A., Calso, S., and Saha, N., "Effectiveness of Countermeasures in Upper Interior Head Impact," SAE Technical Paper 970391, 1997, https://doi.org/10.4271/970391.
Pages:
8
Abstract:
Trim covers made of impact resistant polymers on vehicle interior sheet metal can contribute to reduction of HIC(d) (Head Injury Criterion, dummy) during headform impact. Air-gap between trim and interior sheet metal can also induce deceleration of striking headform before it forces trim to contact sheet metal surface. As evidenced from laboratory component testing, situations may arise where additional protective measures may need to be incorporated between trim and sheet metal in order to attain acceptable levels of HIC(d). Two such alternatives in the form of energy-absorbing foam, and trim with molded collapsible stiffeners are discussed in this paper. The effectiveness of these countermeasures is evaluated through nonlinear finite element analysis, and favorable comparison with laboratory results is reported.
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