Abstract
The paper presents the results of finite element research concerning the fragmentation and bullet resistance of steel plates with various thicknesses as well as epoxy/aramid composite plate. Due to the large number of armed conflicts in various parts of the world, this issue is extremely important due to the safety of infantry soldiers in the areas of military operations. The work presents the results of preliminary numerical tests carried out in commercially available software using the finite element method. The fragment and bullet resistance of three steel plates with various thicknesses at different impact speeds is compared. The material model that was used for steel plates considers the elastically plastic behaviour of the material. Standard striking elements were used for both fracture and bulletproofing. In both cases, Johnson Cook's material model was used, which allows observation of the mushrooming process during impact. The article compares the damage caused by the impact of the bullet core and 9 × 19 mm bullet and then specifies the conditions for which steel plates meet the requirements of fragmentation and bullet resistance in accordance with PN-V 87001:12011. What is more, epoxy/aramid composite was analyzed as well.
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