Effect of Weld on Axial Buckling of Cylindrical Shells
Large oil storage tank (oil tank for short) shells are vulnerable to buckling damage when suffering the seismic loads. Numerical simulation analysis was taken to estimate the effects of the weld form, number and their location to axial buckling stress of cylindrical shells, considering not only the characteristic of welding processes, but also the effects probably caused by magnitude of residual stress and deformation on elephant foot buckling to oil tanks. It is revealed that the existence of circumferential welds had obvious negative effect on axial buckling critical stress compared with the structure without welds, while the effects of weld number and location were not as much; longitudinal welds had no visible effect on axial buckling critical stress; controlling the residual stress and deformation range caused by circumferential welds should be the key point during the tanks welding process.
Liangchi Zhang, Chunliang Zhang and Tielin Shi
Z. Fang et al., "Effect of Weld on Axial Buckling of Cylindrical Shells", Advanced Materials Research, Vols. 139-141, pp. 171-175, 2010