The Influence of Headform/Helmet Friction on Head Impact Biomechanics in Oblique Impacts at Different Tangential Velocities

Oblique impacts of the helmet against ground are most frequent scenarios in real-world motorcycle crashes. The combination two factors that largely affect results oblique impact tests discussed this work. This study aims to quantify effect friction at interface between headform and interior a different magnitudes tangential velocity. helmeted headform, with low high surface was dropped three anvils velocities resulting velocity (3.27 m/s, 5.66 8.08 m/s) same normal component (5.66 m/s). Three directions (front, left-side right-side) repetitions per condition were tested 54 impacts. Tangential variation showed little on linear acceleration results. On contrary, rotational headform’s depends magnitude direction. These indicate may result into underprediction variables would not be representative conditions.