Elastic Stresses at Seals in Plain and Necked Open-Ended Cylinders Under Internal and External Pressures
The finite-element method of stress analysis has been used to compute elastic stresses at the seals in plain and necked cylinders under internal and external pressures, under open-ended conditions. The analysis indicates that although tensile axial as well as hoop stresses are present at the seals, away from the seals the stress conditions are significantly more severe, so that fatigue failures due to repeated pressures would not normally be expected in the vicinity of the seals for either type of cylinder made of ductile materials. Experiments indicate the validity of this conclusion. However, additional axial compressive loading must be provided when the absence of axial tensile stresses could be important, such as in the brittle liner of an open-ended compound vessel for very high cyclic pressures.
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