Currently the ASME pressure Vessel Code, Section VIII, Division 3 gives design pressure equations for monobloc and layered cylindrical shells. These equations are based on the limit (collapse) pressure of the shells and do not include the effectof cross-bores. This Code also contains rules for openings in the cylindrical shells such as cross-bores that are identical to the rules given in the ASME Pressure Vessel Code Section VIII, Division 2.The purpose of this paper is to investigate the effect of cross-bores on the collapse pressure of thick-walled cylindrical shells using the elastic-perfectly plastic finite element stress analysis method and determine if the existing rules for openings,developed for thin-walled cylindrical shells, are also applicable to thick-walled cylindrical shells. The effect of the ratio of the cross-bore diameter to the shell internal diameter at various cylinder wall diameter ratios is presented, and thecriterion for openings requiring no reinforcement given in Division 2 is discussed and compared to the results obtained in this investigation.
展开▼
