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A comparison study of different cyclist helmet designs by finite element analysis

Boekbijdrage - Boekhoofdstuk Conferentiebijdrage

This paper focuses on the mechanical characterisation of the helmets by using the finite element method as a first step in the helmet optimisation and improvement process. Considering the higher risk for head injury in traffic accidents, it is of crucial importance to be able to provide relevant and adequate head protection. The relation between different parameters (materials properties, vents number and localization, etc.) and the risk of head injury is evaluated. The finite element software that is used is MSC Marc Mentat. Starting from STL (standard triangulation language) files different finite elements models were built to compare the mechanical behaviour of the different types of cyclist helmets during the impact. The linear acceleration and the energy absorption were evaluated for abetter understanding of the mechanism through which the helmet protects the head during an impact. All materials studied here protect the head by reducing the linear acceleration by more than 80% and stress values into the head by more than 65%. The anisotropic foam studied in this paper seems to offer the best protection against linear acceleration, stress and deformation. The study showspromising results for the use of anisotropic foams in the process of improving the head protection offered by a helmet.
Boek: Proceedings of The 2008 Finite Element Workshop, 2008, Ulm, Germany
Pagina's: 13 - 23
ISBN:978-3-941573-00-0
Jaar van publicatie:2008