Afanaseva S.A., Belov N.N., Burakov V.A., Burkin V.V., Zykov E.N., Ishchenko A.N., Rodionov A.A., Simonenko V.G., Khabibullin M.V., Yugov N.T.
An initial stage of high-speed penetration of a needle-shaped metal body into the water and its interaction with the metal target are considered. The calculations are carried out in the frame of the continuum mechanics: for a solid body an elastic-plastic model, with allowance for destruction, is suggested, while for the water fluid mechanics equations are used. Over the considered range of speeds of 1.0.2.5 km/s, when the body is entering the water, a mode of developed cavitation occurs; the plastic deformation of the head part of the striker, and in some cases, its destruction, are observed, which leads to increase of the penetration resistance.
