Lykhachova O. Nonlinear deformation and buckling of cylindrical shells with cuts under axial compression

Object of the study - longitudinally compressed circular cylindrical shells with one transversal or longitudinal cut under axial compression, and ANSYS software. Aims of the work: a physical and numerical (by means of ANSYS software) simulation of the deformation and buckling of the shells for different loading conditions and different conditions of applying of an axial compression (loading schemes); the workability of ANSYS software for the numerical simulations of buckling process of the shells with a strong non-uniform stress strain state. Research methods: model experiment and numerical simulation. Theoretical and practical results: the experimental data of axially compressed shells with one cut were obtained; new characteristics of the shells buckling were discovered; the procedure of thin-walled shells design analyses within ANSYS software for a reliable estimation of buckling and failure loads was developed; linear and geometrically nonlinear buckling solutions were determined depending on the loading scheme; a possible replacement of expensive tests of real structures by numerical experiments within ANSYS software was proved. The scientific novelty: by means of experimental and numerical simulation, a nonlinear buckling behavior of the shells with one cut was studied first for 5 different scheme of axial loading; some new effects of the shell buckling were detected; for the first time, main features of linear and geometrically nonlinear buckling analyses were determined depending on the loading scheme. Implementation: the results were adopted for the lectures on CAD for students of PSACEA. Applications: aeronautic and space engineering, shipbuilding, building and civil engineering, chemical and petrochemical industry, mechanical engineering.