The influence of the shape of the head part of a cylindrical heavy alloy striker on the process of its interaction with an aluminum barrier.

The interaction of elongated cylindrical strikers made of tungsten alloy VNZh90 with a finite-thickness plate made of the D16T aluminum alloy is numerically modeled. The influence of the shape of the head of the striker on the process and the result of interaction is investigated. Interaction velocities ranging from 300 to 600 m/s and interaction angles from 0 to 75 degrees are considered. The behavior of the materials of the striker and barrier is described by an elastoplastic model. The limit value of the intensity of plastic deformations is used as a fracture criterion. Modeling is carried out in a three-dimensional statement using the finite element method using the author's algorithm and the EFES 2.0 software, which allows modeling the fragmentation of interacting bodies with the formation of new contact and free surfaces and erosion fracture of materials. The adequacy of the mathematical model and numerical algorithm is confirmed by the good agreement of experimental and numerical results. The interaction of the striker with the flat and conical shape of the head part with the barrier was investigated. The conditions under which the striker ricochets from the barrier were determined. [ABSTRACT FROM AUTHOR]