Abstract
We consider the fracture modes of circular metal plates on normal impact by a rigid spherical body, determine their dependence on the rigidity and plasticity characteristics of the plate material and on its boundary conditions and geometric dimensions referred to the ball diameter, and clarify how the fracture character changes as the impact point approaches the plate edge. For all variations in the collision conditions, we determine the value of the ballistic limit and construct the regions of possible estimation of its value under different, still unstudied experimental conditions.
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