Features of deformation of metal body surfaces under impact of a water jet

7th Conference on Low temperature Plasma in the Processes of Functional Coating Preparation

Aganin, A.A.^1 ; Khismatullina, N.A.^1

Institute of Mechanics and Engineering, Kazan Science Center, Russian Academy of Sciences, 2/31 Lobachevsky str., Kazan

420111, Russia^1

关键词: Axis of symmetry;    Body materials;    Computational results;    Copper nickels;    Elastic-Plastic;    High velocity liquid;    Metal alloys;    Plastic state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/669/1/012031/pdf
DOI  :  10.1088/1742-6596/669/1/012031

来源: IOP

【 摘 要 】

The paper presents a mathematical model and computational results on dynamics of a perfect elastic-plastic body under the load arising during impact of a high-velocity liquid jet with the hemispherical end. The body is simulated by the isotropic linearly-elastic semi-space, its plastic state is described by the von Mises condition. The dependence of features of the body surface deformation on the body material is studied. The problem is considered in the axisymmetric statement. The axis of symmetry is that of the jet. The loaded domain is a circle with its radius rapidly growing from zero to the jet radius. The pressure in the loaded domain is non-uniform both in time and space. Three metal alloys (aluminium, copper-nickel and steel) are considered as the body material. The loading of the body surface in all the cases corresponds to the impact of a water jet with the radius 100 pm and the velocity 300 m/s. It has been shown that under such impact a nanometer pit arises on the body surface at the center of the domain of the jet action. The profile of the pit and its maximal depth depend on the body material.