Abstract
A thin shell analysis is performed to investigate the stress distribution of welded-pad reinforced nozzles in ellipsoidal pressure vessel heads. A comparison of the structural behavior of such a nozzle to an integrally reinforced nozzle shows that a sixty percent higher stress is present in a typical nozzle-vessel geometry. A parametric study is performed for welded-pad reinforced nozzles in ASME 2:1 pressure vessel heads. Results are presented as stress concentration factors and shear stress concentration factors as functions of nondimensional nozzle-vessel geometries.
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