Design and Analysis of a Helmet Equipped with Graded Honeycomb Structure Under Impact of Flat and Hemi-spherical Anvils

Abstract

According to the importance of safety, lightweight energy absorbers such as honeycomb structures have drawn researchers' attention in recent years. In this research, a graded honeycomb structure is proposed in order to reduce head impact injuries during car accidents. Polypropylene polymer is used for the graded honeycomb structure. The structure was modeled by means of Abaqus software and according to the Japanese standard JIS T8133, flat and hemi-spherical anvils were considered to simulate head impact by initial velocities of 5.8 m/s and 4.8 m/s, respectively. Moreover, oblique impact by angle of 60 degrees was studied. Finally, the critical parameters such as absorbed energy, load magnitude and acceleration variations were attained. The obtained results were compared with associated criteria which confirmed the capability of the proposed structure to protect head during accidents.