Phenomenological Model of Perforation Ceramic Plates

The research proposes a model of perforation the ceramic plates with the widening taper breach. The model allows us to determine the taper angle, that depends on the strength characteristics of ceramics and the ratio of the ceramic layer thickness and the diameter of the firing pin. The study showed that the main reason for such type of ceramic fracture is considerably lower ceramics tensile strength compared to its compressive strength. By using energetic fracture criterion, we developed a method for calculating the limit velocity for penetrating the ceramic target. Two-dimensional numerical simulation of the steel firing pins impact on corundum targets showed a satisfactory agreement between the calculated and experimentally obtained taper cracks configurations. This agreement takes place only if the compressive strength and tensile strength limit values are chosen in accordance with the developed model recommendations.

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