This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Optimal Choice of the Foam Design Parameters in Order to Meet the HIC Index Limit of the FMVSS201 Standard
ISSN: 0148-7191, e-ISSN: 2688-3627
Published July 09, 2002 by SAE International in United States
Annotation ability available
Event: International Body Engineering Conference & Exhibition and Automotive & Transportation Technology Congress
Automotive designers are dealing with refinement of the passenger compartment interior surfaces in order to satisfy the FMVSS201 standard that prescribes a limit value to the HIC index in specific impact test.
In these experimental impact tests a featureless headform hits against any location of the front passenger compartment of a motor car and the resulting HIC index is calculated.
One possibility of meeting the FMVSS201 standard is to cover the metallic structure with an appropriate layer of foam. To take advantage of this possibility the designer has to make an appropriate choice of the foam density and of the thickness of the foam layer.
A number of FEM simulations have been used to study the role of these two fundamental design variables by means of a complete experimental plane that also permits exploration of the possible interactions of the variables.
Results support the designer in making his choice in order to meet the regulatory requirements.
CitationBelingardi, G., Duella, R., and Caminiti, A., "Optimal Choice of the Foam Design Parameters in Order to Meet the HIC Index Limit of the FMVSS201 Standard," SAE Technical Paper 2002-01-2095, 2002, https://doi.org/10.4271/2002-01-2095.
- Standard No. 201: Occupant protection in interior impact, 49 CFR, Ch. V, Parts 571.201, Federal Motor Vehicle Safety Standards, National Highway Traffic Safety Administration, Dept. of Transportation, October 1998
- Locke D.J., Clark C.L.- “Energy-absorbing thermoplastics for head impact applications”, SAE International Congress and Exposition, paper 960154, 1996
- Chou C.C., Zhao Y., Lim G.G., Patel R.N., Shahab S.A., Patel P.J. - “Comparative analysis of different energy absorbing materials for interior head impact”, SAE paper 950332, 1995.
- Clifford C.C., Nyquist G.W. - “Analytical studies of the Head Injury Criterion (HIC)”, SAE paper 740082, 1974
- Avalle M., Belingardi G., Montanini R., Mangino E. “Energy absorption characteristic of polymeric structural foams for passive safety applications”, proc. of 6th Int. Conf. Florence ATA 1999 - Firenze, 17-19 November 1999
- Avalle M., Belingardi G., Montanini M. “Characterization of polymeric structural foams under compressive impact loading by means of energy-absorption diagram”, Int. J. of Impact Engineering, vol. 25, pp. 455-472, 2001
- Mines R.A.W., Li Q.M., Alias A., Birch R.S., Close J.A. - “On the measurement of the crush behaviour of structural foam”, proceedings of the 11th Int. Conference on Experimental Mechanics, Oxford, UK, (1998)
- ASTM D1621-94 - “Standard Test Method for Compressive Properties of Rigid Cellular Plastics”, 1994.
- Gibson L. J., Ashby M. F., “Cellular Solids: structure and properties”, 2 ed., Cambridge (UK), Cambridge University Press, 1997
- Pam-Crash Reference Manual, version 2000
- Sounik D.F., Gansen P., Clemons J.L., Liddle J.W. - “Head impact testing of polyurethane energy-absorbing (EA) foams”, SAE International Congress and Exposition, paper 970160, 1997
- Chou C.C., Wu C.C., Lim G.G., Patel R.N. - “Finite element analysis of dynamic response of trim panels under impacts”, proceedings of International Body Engineering Conference, Detroit, USA, (1996)
- Avalle M., Belingardi G., Vadori R., Masciocco G. “Characterisation of the strain rate sensibility in the dynamic bending behaviour of mild steel plates”, proc. of EUROMAT 2000, Tours (F), November 2000, pp. 505-510
- Barbat S.D., Prasad P. - “Finite element modeling of structural foam and head impact interaction with vehicle upper interior”, SAE paper 950885, 1995
- Deb A., Calso S. Saha N. - “Effectiveness of countermeasures in upper interior head impact”, SAE paper 970391, 1997