| Popis: |
This paper presents the results of numerical simulation of the interaction of an elongated glass cylinder with a rigid wall with an initial velocity of 4.2 m/s. The problem is solved numerically, by the finite element method, in a three-dimensional formulation within the framework of the phenomenological approach to the mechanics of a deformable solid using the author's software package EFES. To describe the processes of deformation, fracture and cracking, the JH-2 model was used, which makes it possible to take into account the large deformations, high strain rates and high pressures that occur in the material. The used calculation algorithm takes into account the formation of discontinuities in the material and the fragmentation of bodies with the formation of new free surfaces. A detailed numerical analysis of the dynamics of the stress-strain state of a glass impactor and the effect of shock-wave processes on its fracture is carried out. It was found that the main role in the fracture of the glass impactor, with the considered kinematic and geometric parameters of interaction, are played wave processes. |
