Influence of poisson’s ratio of material on initial velocity recovery factor in Taylor impact test

Abstract

The paper presents numerical simulation results of elastic deformation of cylindrical bodies during the dynamic impact against a rigid wall. Dependences are suggested for the recovery factor of the striker initial velocity and Poisson’s ratio of different materials. This recovery factor is defined as the energy expenditure of striking elements on strain potential energy which depends on Poisson’s ratio. The finite element method (FEM) is used to simulate an impact of plates, cylinders of a compact shape and thin cylinders against a rigid wall. Two series of calculations are carried out for different materials to study the influence of Poisson’s ratio on cylinder deformation. In the first series, the cylinder material is isotropic, while in the second, it is anisotropic auxetic with different orientations of symmetry axes relative to the loading axis. Tetrahedronal elements are used in FEM to simulate deformation. It is found that the higher Poisson’s ratio of the cylinder material, the more kinetic energy converts to potential energy.