Analysis of the effect of interaction between shear and bending load on the buckling strength of cylindrical shells Original Research Article

We must think of two different modes in analysing the buckling of a cylindrical shell under shear load. One is shear mode buckling, which occurs in the case of a short broad cylinder, and the other is bending mode buckling, which occurs in the case of a long slender cylinder. Some researchers have developed buckling strength evaluation methods for each mode. On the other hand, a certain reduction of buckling strength in the transition region between shear-mode-dominant and bending-mode-dominant regions has been observed from experiments. The present study is focused on the evaluation of the interaction between shear and bending load. An analytical evaluation method for this interaction effect is developed from the viewpoint of the propagation of plasticity, and the validity of this method is examined compared with finite element method analyses and experiments. Finally, it is suggested that this method makes it possible to evaluate the buckling strength for any combination of shear and bending load.