Physical and Numerical Modeling of Nonelastic Deformations During an Impact of Spherical Indenter on Ice Disc

Investigation of the changes in ice structure and characteristics under straining has many applications for the problems in the Arctic region, especially during low-speed interactions. This work introduces a complex approach based on the physical and numerical modeling of such deformation processes. The impact of a spherical indenter on an ice disc placed on a massive rigid support with the ability to slip on its surface is studied. As a result of the conducted experiment, instantaneous acceleration of the indenter is obtained. Moreover, local surface and volume deformations of the disc are defined. Numerical simulations are performed in two- and three-dimensional cases. The models' parameters influence on the solutions is identified; a comparison with the experiment is conducted. The applied grid-characteristic method provides an opportunity to accurately reconstruct occurring wave phenomena during the impact. Considered rheological models take into account the formation of the hydrostatic core and the elastoplastic zone. Finally, computations manage to reproduce unique secondary structures observed in experiments.