PARAMETRIC STUDY OF MATERIAL PROPERTIES OF PROTECTIVE LINER OF SKI HELMET

Abstract eng:
 Ski   and   snowboard   helmets   are   designed   to   undergo   mechanical   testing according to the standard CSN EN 1077. The requirements of the standard   are based on the assumption, that the helmet is supposed to be a device which   protects mainly against the injury of skull or mechanical injury, mostly at low   speeds. However, during impacts at higher speeds a second issue can occur –   brain injury caused by enormous deceleration. The capabilities of the helmet to   absorb the energy is limited. To investigate the possibility of improvement of the   protective properties at higher speeds a parametric study of numerical model of   ski  helmet was made. Numerical model of the helmet was created using CAE   methods, the FE analysis was performed in LS­DYNA environment. Comparison   of   results   was   made   using   HIC   value   (probability   of   head/brain   injury).   As   parameter the material properties of the liner were considered.

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