Post buckling stress state of open section cylindrical shells subjected to constrained torsion

Abstract

The work concerns numerical and experimental studies on pre and post buckling of thin-walled steel cylindrical shells of open section subjected to constrained torsion. Two structure solutions different in geometry are considered: open section cylindrical shell without stiffeners and reinforced by closed section stringers. The shells have five various length to diameter aspect ratio. Numerical simulations were carried out and the stress distribution in neuralgic zones in pre and post buckling response was determined. Torsion experiments were performed and the results were compared to the numerical solutions with a reasonably good agreement. The exactness of experiment for the chosen cases of considered solutions was proved by establishing the base for FEM numerical model estimation