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THE UNIVERSITY OF ADELAIDE
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Publication Details

TitleProtection of the unhelmeted head against blunt impact: The pedestrian and the car bonnet
AuthorsHutchinson TP, Searson DJ, Anderson RWG, Dutschke JK, Ponte G, Van Den Berg AL
Year2011
TypeConference Paper
AbstractBackground. In recent years, increasing attention has been paid to improving car frontal design in order to minimise pedestrian injury. Many tests have been carried out using a free-flight instrumented headform projected against the car exterior. For pedestrians and other vulnerable road users, the bonnet should act as a cushion in an impact. Aims of this paper. General principles of bonnet design are stated. Particular attention is given to the issue of stiffness, and new implications are drawn. Findings. Regarding bonnet stiffness, there is an optimum: too stiff, and the bonnet is injurious; not stiff enough, and the pedestrianís head may bottom out, i.e., strike the very stiff structures in the engine compartment. In addition, the optimum bonnet stiffness will be different for different speeds of impact. Conclusions. There is a need for results covering the range of speeds at which serious pedestrian injuries occur. Theory does permit scaling of HIC (Head Injury Criterion) to different speeds, however, so not all speeds will need to be tested. Similar considerations apply to headform mass.
Conference Name2011 Australasian Road Safety Research, Policing and Education Conference
Conference AbbreviationRSR
Conference LocationPerth
Conference Date6-9 November 2011
Page Count10

Reference
Hutchinson TP, Searson DJ, Anderson RWG, Dutschke JK, Ponte G, Van Den Berg AL (2011) 'Protection of the unhelmeted head against blunt impact: The pedestrian and the car bonnet', 2011 Australasian Road Safety Research, Policing and Education Conference, Perth, 6-9 November 2011.


Files Available for Download
CASRunhelmetedheadonbluntobject1249.pdfOriginal PDF as published on conference CD