ELASTOPLASTIC BUCKLING OF AXIALLY COMPRESSED CIRCULAR CYLINDRICAL-SHELLS

Buckling of axially compressed circular cylindrical shells is examined within the framework of small strain elastoplasticity. A linear bifurcation model is used along with the J2 flow and deformation theories. All four possibilities of simple supports (SS1-SS4) and clamped edges (CL1-CL4) are considered. A general solution is given with special emphasis on the axially symmetric modes. Numerical results show that the weakening effect of the relaxed simple supports (SS1-SS2) is considerably reduced in the plastic range. A detailed comparison with available experimental data points in favour of the deformation theory.