hydrocutting, destruction of covering, mathematical modeling. 

Hydrocutting - one of the modern methods applied to the effective removal of destroyed sites of airfield coverings. To select rational modes of the waterjet cutting is necessary to investigate difficult interrelated phenomena. The mathematical model of the tense-deformed state for a cement-concrete airfield covering at affecting on its surface of high-speed hydrostream within the framework mechanics of the multiphase systems is offered. The material of a covering is considered how the diphasic environment. The offered model allows to predict the destruction area of the cement-concrete covering. At quasistationary approach for a case of the flat deformed state the analytical decision is received. The decision determines the destruction depth of the isotropic material depending on the stream pressure and its diameter, and also from the values of tensile strength at a compression and a expansion. The empirical formula, which establishes the coverage destruction depth for a given feed rate of the jet is offered. The mode of an assessment of the destruction depth of an airfield covering convenient for practical calculations during hydrocutting is reasonable.

1. Burakov, Andrey Viktorovich Head of Laboratory, Military Training and Research Center of Air Force, Professor N. E. Zhukovskii and Y. A. Gagarin Air Force Academy, Voronezh

2. Dornyak, Olga Roaldovna Doctor of Technical Sciences, Head of Department, Voronezh State Academy of Forestry, Voronezh

3. Lazukin, V. F. D. Sc. in Pedagogics, Military Training and Research Center of Air Force, Professor N. E. Zhukovskii and Y. A. Gagarin Air Force Academy, Voronezh