Trokhymchuk O. Calculation of massive and thin-walled cylindrical objects during their contact with rigid punches

Isotropic and orthotropic plates with curvilinear holes, contours of which are partly reinforced by thin elastic ribs of variable stiffness, with their force contact interaction with rigid ribbed or smooth punches. Development of methodology for identification, research and optimization of the stress state on the contour of the hole of the plate. To determine the contact stresses by methods of complex variable theory and mechanics of deformable solids it's built a system of singular integral differential equations with Gilbert kernels and logarithmic kernels and also developed approximate methods to solve them. Developed a methodology for calculating the strength and stiffness of the plates. The influence on the stress-strain state and strength of the plates of the hole's form, Physical geometric parameters of reinforcing ribs, orthotropy of the plate material, the magnitude of the contact zone, the number and types of stamps, as well as how they fit into the hole of the plate are investigated. The proposed theoretical basis of calculation makes it possible to use the developed methodology for the design of brake systems, devices for securing the physical devices into wells or tunnels, hook suspensions of cranes, etc. Individual results of an investigation are launched into production. Scope of application: engineering, construction and transport.