The safe-end length effect on welding residual stresses in dissimilar metal welds of surge nozzles

Tae Kwang Song, Chang Young Oh, Ji Soo Kim, Yun Jae Kim, Kyung Soo Lee, Chi Yong Park

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The effects of safe-end length and kinematic boundary conditions during welding on weld residual stresses in dissimilar metal welds are systematically investigated using finite element analyses for typical pressurized water reactor surge nozzle configurations. The study is generalized by idealizing complex nozzle geometries as straight pipes with two welds. The impact of these variables on axial residual stresses at inner surface is examined, since these are of most concern for primary water stress corrosion cracking. Possible mechanisms controlling the development of welding residual stresses are used to qualitatively explain the predicted behavior.

Original languageEnglish
Pages (from-to)1957-1975
Number of pages19
JournalEngineering Fracture Mechanics
Volume78
Issue number9
DOIs
Publication statusPublished - 2011 Jun 1
Externally publishedYes

Keywords

  • Finite element welding simulation
  • Kinematic boundary condition effect
  • Safe-end length effect
  • Surge nozzle in pressurized water reactors
  • Welding residual stresses

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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