Yaryzhko O. Experimental and calculation strain analysis of cylindrical shells in the shock region

The object of the dissertation research is a dynamic strained state of construction members of the cylindrical shell type under the local shock load. The purpose of the research work is experimental analysis of the strained state of cylindrical shells at different shock loads and development of experimental and calculation method for estimation of shell constructions at the shock region. On the basis of new results in experimental research of strain of cylindrical shells with different thickness under contact shock load by striker bars of different weight with various velocities there have been obtained dependency of maximal strain intensity values on the load and the shell parameters. A new analytical solution of the problem of cylindrical shell strain under the local shock load taking into account nonequilibrium distribution of the load in the contact area has been developed. The analytical solution structure and the experimental research results have allowed to work out experimental and calculation method of strain estimation of the dynamic cylindrical shell at the shock region. The method takes into account influence of the shell relative thickness, weight and velocity of striker bar, load point and strain change depending on the distance in the longitudinal, circumferential directions and the process time. The results and recommendations of the carried out applied research have been used at the Ukrainian enterprises. Sphere of application: analysis of the strained state of thin-shelled members under the shock load impact in different branches of machine-building industry