Research of the Connecting Form about the Spherical Shell and the Nozzle

Abstract

The Stress Distribution in the Connection of the Spherical Shell and the Opening Nozzle Is Very Complex. Sharp-Angled Transition and Round Transition Are Used Respectively in the Connection in the Light of the Spherical Shell with the Small Opening and the Large One. the Influence of the Two Connecting Forms on Stress Distribution Is Analyzed by Establishing Finite Element Model and Solving it. the Result Shows there Is Obvious Stress Concentration in the Connection. Round Transition Can Reduce the Maximum Stress in Comparison with Sharp-Angled Transition in both Cases of the Small Opening and the Large Opening, Mainly Reducing the Bending Stress and the Peak Stress, but Not the Membrane Stress. the Effect of Round Transition on Reducing Stress Was Not Significant. so Sharp-Angled Transition Should Be Adopted in the Connection when a Finite Element Model Is Built for Simplification in the Future.

Junctions in shell structures: A review

“…The obtained residual stresses were at the extent of heat affected the region from the weld. Luo [276] analysed by FEM the sharp-angle and round-angle transitions between the spherical shell and the nozzle on the stress distribution in the junction. The round transition could insignificantly reduce the maximum bending and the peak stresses as compared with the sharp-angle transition, but not the membrane stresses.…”