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Simulation-driven design of helmets for head impact protection using an injury-based criterion

Deb, A and Gupta, NK and Biswas, U (2005) Simulation-driven design of helmets for head impact protection using an injury-based criterion. In: WIT Transactions on Engineering Sciences (2005) , MAY 08-12, 2005, Florianopolis, BRAZIL.

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Official URL: http://library.witpress.com/pages/listbooks.asp?ti...

Abstract

The current paper suggests a new procedure for designing helmets for head impact protection for users such as motorcycle riders. According to the approach followed here, a helmet is mounted on a featureless Hybrid 3 headform that is used in assessing vehicles for compliance to the FMVSS 201 regulation in the USA for upper interior head impact safety. The requirement adopted in the latter standard, i.e. not exceeding a threshold HIC(d) limit of 1000, is applied in the present study as a likely criterion for adjudging the efficacy of helmets. An impact velocity of 6 m/s (13.5 mph) for the helmet-headform system striking a rigid target can probably be acceptable for ascertaining a helmet's effectiveness as a countermeasure for minimizing the risk of severe head injury. The proposed procedure is demonstrated with the help of a validated LS-DYNA model of a featureless Hybrid 3 headform in conjunction with a helmet model comprising an outer polypropylene shell to the inner surface of which is bonded a protective polyurethane foam padding of a given thickness. Based on simulation results of impact on a rigid surface, it appears that a minimum foam padding thickness of 40 mm is necessary for obtaining an acceptable value of HIC(d).

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to WITPress.
Department/Centre: Others
Date Deposited: 08 Mar 2012 09:11
Last Modified: 08 Mar 2012 09:11
URI: http://eprints.iisc.ernet.in/id/eprint/43748

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