Experimental Study of the Stability of Circular Cylindrical Shells Under Various Combinations of External Loads

Currently, circular cylindrical shells are quite widely used in construction practice. As a rule, such structures are affected by various combinations of external loads. As a result, a complex state of tension arises in them. Especially important in the study of structures of this type is the issue of stability because under such types of impact as compression, torsion, and external or internal pressure, this issue is crucial compared to the issue of strength. An experimental study of the stability of circular cylindrical shells made of 40X steel under proportional subcritical loading by axial compressive force, torque, and internal pressure in the deviatory deformation space of A.A. Ilyushin Э(3) is carried out. As a result of the study, critical parameters of stresses and deformations, as well as regions of stable shell states in the coordinate planes of A.A. Ilyushin's deviatory deformation space Э(3), were obtained. Experimental research on this issue is of great importance because it allows us to provide experimental justification for theoretical research in this field of scientific research.