Effect of cracks on vibration, buckling and parametric instability of cylindrical shells

This paper presents a study on the vibration, buckling and parametric instability behaviour of a circular cylindrical shell with a crack, subject to axial periodic loading. The effects of crack length and orientation are analysed using the finite element method. The results show that, under tension load, the frequency of the shell initially increases with the load, but then decreases as the load further increases, which leads to local buckling near the crack. The size and the orientation of the crack and the loading parameters all have significant effect on the dynamic stability behaviour of the shell under both compressive and tensile loading.