Modelling ballistic impact on military helmets: The relevance of projectile plasticity

The need to develop armour systems protect against attacks from various sources is increasingly a matter of personal, social and national security. To innovative it necessary monitor developments being made on the type, technology performance threats (weapons, projectiles, explosives, etc.) Specifically, use high protection level helmets battlefield essential. development evaluation methods that can predict injuries trauma therefore major importance. However, risk or arise induced accelerations an additional consideration. new materials layouts for study effects caused by ballistic impacts in human head scenarios. numerical simulation fundamental tool this process. work here presented focuses (finite elements analysis) consequences bullet military injuries. main objectives are assess probability using Head Injury Criterion, impact 9 mm NATO projectile PASGT helmet quantify relevance plasticity whole modelling derived phenomenon deformations evaluated fully three-dimensional models helmet, head, neck projectile. Impact studies done at angles ranging 0 75 ? . Results discussed terms HIC acceleration levels. Thorough comparison analyses rigid deformable observed plastic deformation significant energy dissipation mechanism • A complete neck, model developed injury helmets. Metallic composite shells assessed compared efficiency. It demonstrated should be considered due its absorption role.